<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c4274-243d-7a11-8376-af0a36240b46,g:cef36c12-9073-4b97-80b1-63eb41355d99-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="viv-20251231.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/DocumentandEntityInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019c4274-2b3d-7798-87d2-60db7238e4f5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentInformationTable_019c4274-2b3d-7798-87d2-60db7238e4f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2b3d-7326-aa13-e9c3abeaae11" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019c4274-2b3d-7798-87d2-60db7238e4f5" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2b3d-7326-aa13-e9c3abeaae11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7326-aa13-e9c3abeaae11_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2b3d-7326-aa13-e9c3abeaae11" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7326-aa13-e9c3abeaae11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7506-931b-894d21c7c4b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2b3d-7326-aa13-e9c3abeaae11" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7506-931b-894d21c7c4b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_019c4274-2b3d-744e-887f-99637468a727" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7506-931b-894d21c7c4b1" xlink:to="loc_ifrs-full_OrdinarySharesMember_019c4274-2b3d-744e-887f-99637468a727" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmericandepositorysharesMember_019c4274-2b3d-73ef-aba4-34f07822c68a" xlink:href="viv-20251231.xsd#viv_AmericandepositorysharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2b3d-7506-931b-894d21c7c4b1" xlink:to="loc_viv_AmericandepositorysharesMember_019c4274-2b3d-73ef-aba4-34f07822c68a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_019c4274-2b3d-7268-b596-fc1dd0c3e83a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019c4274-2b3d-7798-87d2-60db7238e4f5" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_019c4274-2b3d-7268-b596-fc1dd0c3e83a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_019c4274-2b3d-7268-b596-fc1dd0c3e83a_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_019c4274-2b3d-7268-b596-fc1dd0c3e83a" xlink:to="loc_dei_AddressTypeDomain_019c4274-2b3d-7268-b596-fc1dd0c3e83a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_019c4274-2b3d-7273-8ee6-32de291eb41c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_019c4274-2b3d-7268-b596-fc1dd0c3e83a" xlink:to="loc_dei_AddressTypeDomain_019c4274-2b3d-7273-8ee6-32de291eb41c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_BusinessContactMember_019c4274-2b3d-7853-b159-f8172fb7c147" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_BusinessContactMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_019c4274-2b3d-7273-8ee6-32de291eb41c" xlink:to="loc_dei_BusinessContactMember_019c4274-2b3d-7853-b159-f8172fb7c147" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019c4274-2b3d-7ea3-844f-cccb8d47f329" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentType_019c4274-2b3d-7ea3-844f-cccb8d47f329" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentRegistrationStatement_019c4274-2b3d-741a-9826-79e73a4befbe" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentRegistrationStatement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentRegistrationStatement_019c4274-2b3d-741a-9826-79e73a4befbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_019c4274-2b3d-7db2-80f0-f29d4fa27511" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentAnnualReport_019c4274-2b3d-7db2-80f0-f29d4fa27511" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019c4274-2b3d-72b3-b095-4cab9f4de900" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentPeriodEndDate_019c4274-2b3d-72b3-b095-4cab9f4de900" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019c4274-2b3d-78dd-8848-9ede6ff3d94f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentTransitionReport_019c4274-2b3d-78dd-8848-9ede6ff3d94f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentShellCompanyReport_019c4274-2b3d-77b4-a7d0-b71850c8c92c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentShellCompanyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentShellCompanyReport_019c4274-2b3d-77b4-a7d0-b71850c8c92c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019c4274-2b3d-7e49-8c48-8e5adde4ac9f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityFileNumber_019c4274-2b3d-7e49-8c48-8e5adde4ac9f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019c4274-2b3d-7356-b33a-90c532f1e4be" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityRegistrantName_019c4274-2b3d-7356-b33a-90c532f1e4be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019c4274-2b3d-76de-9cd1-62b6f201d2bd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019c4274-2b3d-76de-9cd1-62b6f201d2bd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ContactPersonnelName_019c4274-2b3d-720d-bbac-0001e00cf1fa" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_ContactPersonnelName_019c4274-2b3d-720d-bbac-0001e00cf1fa" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019c4274-2b3d-7977-8a59-0c1964cc1d81" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_CityAreaCode_019c4274-2b3d-7977-8a59-0c1964cc1d81" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019c4274-2b3d-7a55-9f44-5108f5f4a36a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_LocalPhoneNumber_019c4274-2b3d-7a55-9f44-5108f5f4a36a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019c4274-2b3d-7150-aa39-747f3350c777" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressAddressLine1_019c4274-2b3d-7150-aa39-747f3350c777" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019c4274-2b3d-7b1b-b92b-374eead7cec0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressAddressLine2_019c4274-2b3d-7b1b-b92b-374eead7cec0" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine3_019c4274-2b3d-7607-8921-ed4d22dde1db" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine3"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressAddressLine3_019c4274-2b3d-7607-8921-ed4d22dde1db" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019c4274-2b3d-7352-8ef6-516155043598" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressPostalZipCode_019c4274-2b3d-7352-8ef6-516155043598" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019c4274-2b3d-7b45-8b8c-90eed3cea657" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressCityOrTown_019c4274-2b3d-7b45-8b8c-90eed3cea657" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_019c4274-2b3d-7b2a-b5a4-b24918338528" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAddressCountry_019c4274-2b3d-7b2a-b5a4-b24918338528" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ContactPersonnelEmailAddress_019c4274-2b3d-7ee6-a55d-d732e97434ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_ContactPersonnelEmailAddress"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_ContactPersonnelEmailAddress_019c4274-2b3d-7ee6-a55d-d732e97434ed" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019c4274-2b3d-737a-bb41-d5e5dc654e1f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_Security12bTitle_019c4274-2b3d-737a-bb41-d5e5dc654e1f" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019c4274-2b3d-7311-ad16-4a323f1bec8f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_TradingSymbol_019c4274-2b3d-7311-ad16-4a323f1bec8f" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019c4274-2b3d-7a67-b9c0-4dbaad240e52" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_SecurityExchangeName_019c4274-2b3d-7a67-b9c0-4dbaad240e52" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019c4274-2b3d-70f2-a4d1-57141392e8a8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019c4274-2b3d-70f2-a4d1-57141392e8a8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_019c4274-2b3d-787e-a970-9c222c0b5e00" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_019c4274-2b3d-787e-a970-9c222c0b5e00" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_019c4274-2b3d-7a9a-b666-82c455b21449" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityVoluntaryFilers_019c4274-2b3d-7a9a-b666-82c455b21449" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019c4274-2b3d-7c63-8e74-ff389c6d0482" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityCurrentReportingStatus_019c4274-2b3d-7c63-8e74-ff389c6d0482" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019c4274-2b3d-745c-9ea8-49ba3f2f60aa" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityInteractiveDataCurrent_019c4274-2b3d-745c-9ea8-49ba3f2f60aa" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019c4274-2b3d-742f-a1b2-621da5b698d1" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityFilerCategory_019c4274-2b3d-742f-a1b2-621da5b698d1" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019c4274-2b3d-77b3-9ac2-77b8b72c883e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityEmergingGrowthCompany_019c4274-2b3d-77b3-9ac2-77b8b72c883e" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_019c4274-2b3d-7bc1-843e-222d895ee3c6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_IcfrAuditorAttestationFlag_019c4274-2b3d-7bc1-843e-222d895ee3c6" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAccountingStandard_019c4274-2b3d-7861-bc6e-744cc435a5ef" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAccountingStandard"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentAccountingStandard_019c4274-2b3d-7861-bc6e-744cc435a5ef" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019c4274-2b3d-7d99-bf39-14d9d19d52d6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityShellCompany_019c4274-2b3d-7d99-bf39-14d9d19d52d6" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019c4274-2b3d-7bcc-ba3e-11124a5e05be" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityCentralIndexKey_019c4274-2b3d-7bcc-ba3e-11124a5e05be" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019c4274-2b3d-7001-b2a6-e0bd92341d69" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_CurrentFiscalYearEndDate_019c4274-2b3d-7001-b2a6-e0bd92341d69" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019c4274-2b3d-7ec0-a6fc-15d9e6c03450" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentFiscalYearFocus_019c4274-2b3d-7ec0-a6fc-15d9e6c03450" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019c4274-2b3d-7bc4-8048-9ba9268ba907" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019c4274-2b3d-7bc4-8048-9ba9268ba907" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019c4274-2b3d-7b77-b46d-2d16b90e4a56" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_AmendmentFlag_019c4274-2b3d-7b77-b46d-2d16b90e4a56" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorName_019c4274-2b3d-7fc6-83e3-65ea33f403e2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_AuditorName_019c4274-2b3d-7fc6-83e3-65ea33f403e2" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorFirmId_019c4274-2b3d-7dc7-8f28-c9d2c542f2e2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_AuditorFirmId_019c4274-2b3d-7dc7-8f28-c9d2c542f2e2" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorLocation_019c4274-2b3d-7534-bd29-233dc614098f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_AuditorLocation_019c4274-2b3d-7534-bd29-233dc614098f" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAccountingStandard_019c4274-2b3d-7e7c-9a88-949db27aa846" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAccountingStandard"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_EntityAccountingStandard_019c4274-2b3d-7e7c-9a88-949db27aa846" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_019c4274-2b3d-7fa3-8cf1-aeccfbca47b2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019c4274-2b3d-7dea-a614-6bb30fe7ec8e" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_019c4274-2b3d-7fa3-8cf1-aeccfbca47b2" xlink:type="arc" order="41"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/ConsolidatedStatementsofIncome" xlink:type="simple" xlink:href="viv-20251231.xsd#ConsolidatedStatementsofIncome"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/ConsolidatedStatementsofIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:href="viv-20251231.xsd#viv_IfrsStatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsStatementTable_019c4274-2c13-7f37-b61d-7fa552db3514" xlink:href="viv-20251231.xsd#viv_IfrsStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_viv_IfrsStatementTable_019c4274-2c13-7f37-b61d-7fa552db3514" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2c13-74d2-9849-4f2cfba51c9f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_IfrsStatementTable_019c4274-2c13-7f37-b61d-7fa552db3514" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2c13-74d2-9849-4f2cfba51c9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-74d2-9849-4f2cfba51c9f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2c13-74d2-9849-4f2cfba51c9f" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-74d2-9849-4f2cfba51c9f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-7b58-a0a4-47c7b51d9c7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2c13-74d2-9849-4f2cfba51c9f" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-7b58-a0a4-47c7b51d9c7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_019c4274-2c13-70a6-8cec-55ba272e2427" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-7b58-a0a4-47c7b51d9c7e" xlink:to="loc_ifrs-full_OrdinarySharesMember_019c4274-2c13-70a6-8cec-55ba272e2427" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PreferenceSharesMember_019c4274-2c13-7a6d-ab2c-87ffe691d3c5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PreferenceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2c13-7b58-a0a4-47c7b51d9c7e" xlink:to="loc_ifrs-full_PreferenceSharesMember_019c4274-2c13-7a6d-ab2c-87ffe691d3c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2c13-71ec-9c16-4d263d884f4a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromRenderingOfTelecommunicationServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2c13-71ec-9c16-4d263d884f4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CostOfSales_019c4274-2c13-7a92-aae7-43dbede39fe5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CostOfSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_CostOfSales_019c4274-2c13-7a92-aae7-43dbede39fe5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossProfit_019c4274-2c13-7421-81a7-22ebb5b33bee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_GrossProfit_019c4274-2c13-7421-81a7-22ebb5b33bee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OperatingExpenseIncomeExcludingCostOfSales_019c4274-2c13-7d2c-b0cc-48c8ce850eb0" xlink:href="viv-20251231.xsd#viv_OperatingExpenseIncomeExcludingCostOfSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_viv_OperatingExpenseIncomeExcludingCostOfSales_019c4274-2c13-7d2c-b0cc-48c8ce850eb0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SellingExpense_019c4274-2c13-7b20-97cb-018157e4cbe0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SellingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_SellingExpense_019c4274-2c13-7b20-97cb-018157e4cbe0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeneralAndAdministrativeExpense_019c4274-2c13-7ee6-8eea-f67ce7c1a954" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_GeneralAndAdministrativeExpense_019c4274-2c13-7ee6-8eea-f67ce7c1a954" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherOperatingIncomeExpense_019c4274-2c13-78ee-9453-7c72845105c4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherOperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_OtherOperatingIncomeExpense_019c4274-2c13-78ee-9453-7c72845105c4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_019c4274-2c13-7c6c-9538-ad1ea513dc4e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_019c4274-2c13-7c6c-9538-ad1ea513dc4e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossFromOperatingActivities_019c4274-2c13-79b5-b02c-73a59a4f8711" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossFromOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_ProfitLossFromOperatingActivities_019c4274-2c13-79b5-b02c-73a59a4f8711" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceIncomeExpensesNet_019c4274-2c13-7a98-945a-37468006c66c" xlink:href="viv-20251231.xsd#viv_FinanceIncomeExpensesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_viv_FinanceIncomeExpensesNet_019c4274-2c13-7a98-945a-37468006c66c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossBeforeTax_019c4274-2c13-70c7-9e14-5884c8597851" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_ProfitLossBeforeTax_019c4274-2c13-70c7-9e14-5884c8597851" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019c4274-2c13-7c7a-911d-5094280d7d8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncomeTaxExpenseContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_IncomeTaxExpenseContinuingOperations_019c4274-2c13-7c7a-911d-5094280d7d8d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c4274-2c13-71f2-95ed-37dad708a4fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_ProfitLoss_019c4274-2c13-71f2-95ed-37dad708a4fe" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToAbstract_019c4274-2c13-7b5a-821d-e4cc5e2f66e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_ProfitLossAttributableToAbstract_019c4274-2c13-7b5a-821d-e4cc5e2f66e3" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019c4274-2c13-7143-b5d5-0428d345e2b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProfitLossAttributableToAbstract_019c4274-2c13-7b5a-821d-e4cc5e2f66e3" xlink:to="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019c4274-2c13-7143-b5d5-0428d345e2b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_019c4274-2c13-732b-a11a-25c3e9798e6f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProfitLossAttributableToAbstract_019c4274-2c13-7b5a-821d-e4cc5e2f66e3" xlink:to="loc_ifrs-full_ProfitLossAttributableToNoncontrollingInterests_019c4274-2c13-732b-a11a-25c3e9798e6f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DilutedEarningsLossPerShare_019c4274-2c13-7182-85ec-03f4cf31b654" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DilutedEarningsLossPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsStatementLineItems_019c4274-2c13-7313-a2f4-ad8d7d81b448" xlink:to="loc_ifrs-full_DilutedEarningsLossPerShare_019c4274-2c13-7182-85ec-03f4cf31b654" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/ConsolidatedStatementsofChangesinEquity" xlink:type="simple" xlink:href="viv-20251231.xsd#ConsolidatedStatementsofChangesinEquity"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/ConsolidatedStatementsofChangesinEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable_019c4274-2c13-7ac6-b712-75027232f7a1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_StatementOfChangesInEquityTable_019c4274-2c13-7ac6-b712-75027232f7a1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfReservesAxis_019c4274-2c13-7a59-816a-09551b3177f6" xlink:href="viv-20251231.xsd#viv_TypeOfReservesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_019c4274-2c13-7ac6-b712-75027232f7a1" xlink:to="loc_viv_TypeOfReservesAxis_019c4274-2c13-7a59-816a-09551b3177f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveDomain_019c4274-2c13-7a59-816a-09551b3177f6_default" xlink:href="viv-20251231.xsd#viv_ReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypeOfReservesAxis_019c4274-2c13-7a59-816a-09551b3177f6" xlink:to="loc_viv_ReserveDomain_019c4274-2c13-7a59-816a-09551b3177f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveDomain_019c4274-2c13-7f74-9c6a-28eda51d6ed6" xlink:href="viv-20251231.xsd#viv_ReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypeOfReservesAxis_019c4274-2c13-7a59-816a-09551b3177f6" xlink:to="loc_viv_ReserveDomain_019c4274-2c13-7f74-9c6a-28eda51d6ed6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReservesMember_019c4274-2c13-7324-8ddd-66a3dce2fd33" xlink:href="viv-20251231.xsd#viv_CapitalReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ReserveDomain_019c4274-2c13-7f74-9c6a-28eda51d6ed6" xlink:to="loc_viv_CapitalReservesMember_019c4274-2c13-7324-8ddd-66a3dce2fd33" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesMember_019c4274-2c13-71e7-b8a5-30ba07289e48" xlink:href="viv-20251231.xsd#viv_IncomeReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ReserveDomain_019c4274-2c13-7f74-9c6a-28eda51d6ed6" xlink:to="loc_viv_IncomeReservesMember_019c4274-2c13-71e7-b8a5-30ba07289e48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2c13-75fb-bf01-c49837908b54" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_019c4274-2c13-7ac6-b712-75027232f7a1" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2c13-75fb-bf01-c49837908b54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2c13-75fb-bf01-c49837908b54_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2c13-75fb-bf01-c49837908b54" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2c13-75fb-bf01-c49837908b54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2c13-7a28-b0df-12b6e67b79d9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2c13-75fb-bf01-c49837908b54" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2c13-7a28-b0df-12b6e67b79d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2c13-7a28-b0df-12b6e67b79d9" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember_019c4274-2c13-7af4-89de-8a06ead818b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_IssuedCapitalMember_019c4274-2c13-7af4-89de-8a06ead818b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SpecialGoodwillReserveMember_019c4274-2c13-7b32-9d04-ecbe73698b98" xlink:href="viv-20251231.xsd#viv_SpecialGoodwillReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_SpecialGoodwillReserveMember_019c4274-2c13-7b32-9d04-ecbe73698b98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember_019c4274-2c13-7a5a-8c42-863ba069f381" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasurySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_TreasurySharesMember_019c4274-2c13-7a5a-8c42-863ba069f381" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalReserveMember_019c4274-2c13-7f09-b714-3ad71bbdcec5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CapitalReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_CapitalReserveMember_019c4274-2c13-7f09-b714-3ad71bbdcec5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesLegalReserveMember_019c4274-2c13-718f-a161-aaa1676b459a" xlink:href="viv-20251231.xsd#viv_IncomeReservesLegalReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_IncomeReservesLegalReserveMember_019c4274-2c13-718f-a161-aaa1676b459a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxIncentiveReserveMember_019c4274-2c13-7407-91aa-53ac236593ac" xlink:href="viv-20251231.xsd#viv_TaxIncentiveReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_TaxIncentiveReserveMember_019c4274-2c13-7407-91aa-53ac236593ac" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveForRemunerationAndInvestmentsMember_019c4274-2c13-7cc8-9104-1a8f20f76cb1" xlink:href="viv-20251231.xsd#viv_ReserveForRemunerationAndInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_ReserveForRemunerationAndInvestmentsMember_019c4274-2c13-7cc8-9104-1a8f20f76cb1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReserveExpansionAndModernizationReserveMember_019c4274-2c13-7fbd-a675-8c24b845fc2a" xlink:href="viv-20251231.xsd#viv_IncomeReserveExpansionAndModernizationReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_IncomeReserveExpansionAndModernizationReserveMember_019c4274-2c13-7fbd-a675-8c24b845fc2a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarningsMember_019c4274-2c13-77dd-83bc-44e8a3b4aece" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_RetainedEarningsMember_019c4274-2c13-77dd-83bc-44e8a3b4aece" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProposedAdditionalDividendsMember_019c4274-2c13-754d-b7c1-7c1149d88e1c" xlink:href="viv-20251231.xsd#viv_ProposedAdditionalDividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_ProposedAdditionalDividendsMember_019c4274-2c13-754d-b7c1-7c1149d88e1c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReservesMember_019c4274-2c13-75e3-9c2a-f3b83f654a7c" xlink:href="viv-20251231.xsd#viv_CapitalReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_viv_CapitalReservesMember_019c4274-2c13-75e3-9c2a-f3b83f654a7c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherEquityInterestMember_019c4274-2c13-78c5-81dc-c9a512f7f3d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherEquityInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_OtherEquityInterestMember_019c4274-2c13-78c5-81dc-c9a512f7f3d4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterestsMember_019c4274-2c13-7d46-98e2-2df31200522b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncontrollingInterestsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2c13-7cd0-b774-a59a9d4c3731" xlink:to="loc_ifrs-full_NoncontrollingInterestsMember_019c4274-2c13-7d46-98e2-2df31200522b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c4274-2c13-778b-a0b0-d27b4c8ab109" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_Equity_019c4274-2c13-778b-a0b0-d27b4c8ab109" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DividendsRecognisedAsDistributionsToOwnersOfParentRelatingToPriorYears_019c4274-2c13-793d-bdb4-44e17de828b8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DividendsRecognisedAsDistributionsToOwnersOfParentRelatingToPriorYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_DividendsRecognisedAsDistributionsToOwnersOfParentRelatingToPriorYears_019c4274-2c13-793d-bdb4-44e17de828b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughPrescribedEquityInstrumentsIncludingUnclaimedDividendsAndInterestOnEquityEquity_019c4274-2c13-7b8f-b466-806da629c553" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughPrescribedEquityInstrumentsIncludingUnclaimedDividendsAndInterestOnEquityEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_IncreaseDecreaseThroughPrescribedEquityInstrumentsIncludingUnclaimedDividendsAndInterestOnEquityEquity_019c4274-2c13-7b8f-b466-806da629c553" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxIncentivesOnCorporateIncomeTaxReturnAdjustments_019c4274-2c13-77c8-899e-680c23564d54" xlink:href="viv-20251231.xsd#viv_TaxIncentivesOnCorporateIncomeTaxReturnAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_TaxIncentivesOnCorporateIncomeTaxReturnAdjustments_019c4274-2c13-77c8-899e-680c23564d54" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CancellationOfCommonSharesToBeHeldInTreasury_019c4274-2c13-78a2-8ed8-b5c763bd8693" xlink:href="viv-20251231.xsd#viv_CancellationOfCommonSharesToBeHeldInTreasury"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_CancellationOfCommonSharesToBeHeldInTreasury_019c4274-2c13-78a2-8ed8-b5c763bd8693" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RepurchaseOfCommonShares_019c4274-2c13-7394-bc2c-1f1974b1f083" xlink:href="viv-20251231.xsd#viv_RepurchaseOfCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_RepurchaseOfCommonShares_019c4274-2c13-7394-bc2c-1f1974b1f083" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RightOfWithdrawalApprovalOfAcquisitionOfGarliava_019c4274-2c13-7f30-90a3-ef33ae82998e" xlink:href="viv-20251231.xsd#viv_RightOfWithdrawalApprovalOfAcquisitionOfGarliava"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_RightOfWithdrawalApprovalOfAcquisitionOfGarliava_019c4274-2c13-7f30-90a3-ef33ae82998e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseFromPremiumOnAcquisitionOfSubsidiaryEquity_019c4274-2c13-7a29-a372-ee16bea5b8fd" xlink:href="viv-20251231.xsd#viv_DecreaseFromPremiumOnAcquisitionOfSubsidiaryEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_DecreaseFromPremiumOnAcquisitionOfSubsidiaryEquity_019c4274-2c13-7a29-a372-ee16bea5b8fd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EffectsOfNonControllingShareholdersOnInvestmentsInVivoVentures_019c4274-2c13-719d-af91-41761e7d8831" xlink:href="viv-20251231.xsd#viv_EffectsOfNonControllingShareholdersOnInvestmentsInVivoVentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_EffectsOfNonControllingShareholdersOnInvestmentsInVivoVentures_019c4274-2c13-719d-af91-41761e7d8831" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary_019c442a-7be9-7f53-b8b3-eb851d947e20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughAcquisitionOfSubsidiary_019c442a-7be9-7f53-b8b3-eb851d947e20" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalTransactionForAcquisition_019c4434-5ba4-7d29-a575-6ec1c8edd4ee" xlink:href="viv-20251231.xsd#viv_CapitalTransactionForAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_CapitalTransactionForAcquisition_019c4434-5ba4-7d29-a575-6ec1c8edd4ee" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalTransactionsShareConsolidationAndStockSplitProcesses_019c4441-d0f2-7305-a056-fc9c8f166fcf" xlink:href="viv-20251231.xsd#viv_CapitalTransactionsShareConsolidationAndStockSplitProcesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_CapitalTransactionsShareConsolidationAndStockSplitProcesses_019c4441-d0f2-7305-a056-fc9c8f166fcf" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncome_019c4274-2c13-7e3b-aa60-ae1031730c31" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_OtherComprehensiveIncome_019c4274-2c13-7e3b-aa60-ae1031730c31" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c4274-2c13-7773-97c7-2430c1a95dfd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_ProfitLoss_019c4274-2c13-7773-97c7-2430c1a95dfd" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeToLegalReserve_019c4274-2c13-7bd5-8a5e-878268f77520" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeToLegalReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_AllocationOfIncomeToLegalReserve_019c4274-2c13-7bd5-8a5e-878268f77520" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityGross_019c4274-2c13-71f3-b824-329f14e66175" xlink:href="viv-20251231.xsd#viv_InterestOnEquityGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_InterestOnEquityGross_019c4274-2c13-71f3-b824-329f14e66175" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityAndDividendsGrossAmount_019c4274-2c13-7c16-a4a6-814e82daa2dc" xlink:href="viv-20251231.xsd#viv_InterestOnEquityAndDividendsGrossAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_InterestOnEquityAndDividendsGrossAmount_019c4274-2c13-7c16-a4a6-814e82daa2dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareCancellationShareBuybackProgram_019c4274-2c13-7c97-ab51-16bd855663dc" xlink:href="viv-20251231.xsd#viv_ShareCancellationShareBuybackProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_ShareCancellationShareBuybackProgram_019c4274-2c13-7c97-ab51-16bd855663dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterimDividends_019c4274-2c13-7364-813f-5568ad5ad698" xlink:href="viv-20251231.xsd#viv_InterimDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_InterimDividends_019c4274-2c13-7364-813f-5568ad5ad698" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeToAdditionalDividendProposed_019c4274-2c13-79cb-91c1-7b8bf3601b0e" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeToAdditionalDividendProposed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_AllocationOfIncomeToAdditionalDividendProposed_019c4274-2c13-79cb-91c1-7b8bf3601b0e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveForRemunerationAndInvestments_019c4274-2c13-709b-8832-20547b699467" xlink:href="viv-20251231.xsd#viv_ReserveForRemunerationAndInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_ReserveForRemunerationAndInvestments_019c4274-2c13-709b-8832-20547b699467" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeToReversalExpansionAndModernizationReserve_019c4274-2c13-7deb-ae8f-43c75d99cc0d" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeToReversalExpansionAndModernizationReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfIncomeAbstract_019c4274-2c13-7ce4-8106-91c40865b62b" xlink:to="loc_viv_AllocationOfIncomeToReversalExpansionAndModernizationReserve_019c4274-2c13-7deb-ae8f-43c75d99cc0d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c4274-2c13-717c-baea-f0f9686cb719" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAndLiabilities_019c4274-2c13-7a1f-a5fe-8db43ef5d34a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAndLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_019c4274-2c13-75f7-a7a5-6eacb7f98f43" xlink:to="loc_ifrs-full_EquityAndLiabilities_019c4274-2c13-7a1f-a5fe-8db43ef5d34a" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/Cybersecurity" xlink:type="simple" xlink:href="viv-20251231.xsd#Cybersecurity"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/Cybersecurity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_019c492e-c407-70ad-b525-4d691ebcf027" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_019c492e-92ab-7ad4-9187-77653b8e1311" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_019c492e-c407-70ad-b525-4d691ebcf027" xlink:to="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_019c492e-92ab-7ad4-9187-77653b8e1311" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_019c492e-c407-70ad-b525-4d691ebcf027" xlink:to="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementProcessesIntegratedFlag_019c493a-de51-7eb9-a454-6ca8c8b8dc2d" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:to="loc_cyd_CybersecurityRiskManagementProcessesIntegratedFlag_019c493a-de51-7eb9-a454-6ca8c8b8dc2d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_019c4948-a2c4-703e-be9f-2eb7c4e69e07" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:to="loc_cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_019c4948-a2c4-703e-be9f-2eb7c4e69e07" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_019c494c-d04b-7938-a910-3f33a7023982" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementThirdPartyEngagedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:to="loc_cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_019c494c-d04b-7938-a910-3f33a7023982" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_019c494f-ee9f-7fca-8bc2-4857a2a1537c" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_019c492f-1d93-789d-a4c7-b4fff892efc1" xlink:to="loc_cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_019c494f-ee9f-7fca-8bc2-4857a2a1537c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_019c492f-41e3-7d87-8b7b-0f995a626783" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_019c492e-c407-70ad-b525-4d691ebcf027" xlink:to="loc_cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_019c492f-41e3-7d87-8b7b-0f995a626783" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_019c4951-cef9-7c70-a2c5-5cca96a9d538" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_019c492f-41e3-7d87-8b7b-0f995a626783" xlink:to="loc_cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_019c4951-cef9-7c70-a2c5-5cca96a9d538" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_019c4952-fe09-7e90-b070-a6c73fe734e5" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_019c492f-41e3-7d87-8b7b-0f995a626783" xlink:to="loc_cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_019c4952-fe09-7e90-b070-a6c73fe734e5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_cyd_CybersecurityRiskRoleOfManagementTextBlock_019c4954-11f3-766b-8e47-991d63be91f7" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskRoleOfManagementTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_019c492f-41e3-7d87-8b7b-0f995a626783" xlink:to="loc_cyd_CybersecurityRiskRoleOfManagementTextBlock_019c4954-11f3-766b-8e47-991d63be91f7" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PROVISIONANDCONTINGENCIESTables" xlink:type="simple" xlink:href="viv-20251231.xsd#PROVISIONANDCONTINGENCIESTables"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PROVISIONANDCONTINGENCIESTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7e17-9805-31c8fa7e6d0f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7a9e-abe6-c7dfa9cce4d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7e17-9805-31c8fa7e6d0f" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7a9e-abe6-c7dfa9cce4d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-7507-824f-41c0258239e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7a9e-abe6-c7dfa9cce4d2" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-7507-824f-41c0258239e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7507-824f-41c0258239e3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-7507-824f-41c0258239e3" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7507-824f-41c0258239e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-7507-824f-41c0258239e3" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLaborMember_019c4274-2cde-776f-8542-9190e1b9309a" xlink:href="viv-20251231.xsd#viv_ProvisionForLaborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:to="loc_viv_ProvisionForLaborMember_019c4274-2cde-776f-8542-9190e1b9309a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-7001-84d7-a82529e431f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:to="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-7001-84d7-a82529e431f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7cc8-b5f6-eb4e2f77ccab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LegalProceedingsProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:to="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7cc8-b5f6-eb4e2f77ccab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7f17-9914-489fb505ecdc" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7bbb-938a-0219847bbb6e" xlink:to="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7f17-9914-489fb505ecdc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsExplanatory_019c4274-2cde-73cb-bf90-a10b67e59f38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsExplanatory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7e17-9805-31c8fa7e6d0f" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsExplanatory_019c4274-2cde-73cb-bf90-a10b67e59f38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfProvisionContingenciesTableTextBlock_019c4274-2cde-73c2-b6cb-57fd0add6fa5" xlink:href="viv-20251231.xsd#viv_DisclosureOfProvisionContingenciesTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7e17-9805-31c8fa7e6d0f" xlink:to="loc_viv_DisclosureOfProvisionContingenciesTableTextBlock_019c4274-2cde-73c2-b6cb-57fd0add6fa5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OTHERMATTERSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#OTHERMATTERSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OTHERMATTERSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfOtherMattersLineItems_019c4274-2e74-7a94-881e-577840d2985a" xlink:href="viv-20251231.xsd#viv_DisclosureOfOtherMattersLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfOtherMattersTable_019c4274-2e74-7e38-a739-9f084b0ba46b" xlink:href="viv-20251231.xsd#viv_DisclosureOfOtherMattersTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfOtherMattersLineItems_019c4274-2e74-7a94-881e-577840d2985a" xlink:to="loc_viv_DisclosureOfOtherMattersTable_019c4274-2e74-7e38-a739-9f084b0ba46b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FineForNonComplianceWithEnvironmentalLegislation_019c4274-2e74-72e1-bb6c-bd708669153d" xlink:href="viv-20251231.xsd#viv_FineForNonComplianceWithEnvironmentalLegislation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfOtherMattersLineItems_019c4274-2e74-7a94-881e-577840d2985a" xlink:to="loc_viv_FineForNonComplianceWithEnvironmentalLegislation_019c4274-2e74-72e1-bb6c-bd708669153d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATIONSDetail1" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATIONSDetail1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATIONSDetail1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c7222-aab7-7b18-895c-0884d9c2931f" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c7222-aab7-7b18-895c-0884d9c2931f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7222-aab7-7da8-b276-c25c68a20648" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c7222-aab7-7b18-895c-0884d9c2931f" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7222-aab7-7da8-b276-c25c68a20648" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7222-aab7-7da8-b276-c25c68a20648_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7222-aab7-7da8-b276-c25c68a20648" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7222-aab7-7da8-b276-c25c68a20648_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7222-aab7-7061-9227-09ada4d23ccc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7222-aab7-7da8-b276-c25c68a20648" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7222-aab7-7061-9227-09ada4d23ccc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c7222-aab7-72c8-bc7e-8453f4f71ecf" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7222-aab7-7061-9227-09ada4d23ccc" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c7222-aab7-72c8-bc7e-8453f4f71ecf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7223-01da-7174-a071-a5b7168675ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c7222-aab7-7b18-895c-0884d9c2931f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7223-01da-7174-a071-a5b7168675ea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7223-01da-7174-a071-a5b7168675ea_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7223-01da-7174-a071-a5b7168675ea" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7223-01da-7174-a071-a5b7168675ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7223-01da-7800-814f-218bf55b69f4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7223-01da-7174-a071-a5b7168675ea" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7223-01da-7800-814f-218bf55b69f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerraNetworksBrasilLTDAMember_019c7223-b99d-7fb8-af7c-1eda890acee2" xlink:href="viv-20251231.xsd#viv_TerraNetworksBrasilLTDAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7223-01da-7800-814f-218bf55b69f4" xlink:to="loc_viv_TerraNetworksBrasilLTDAMember_019c7223-b99d-7fb8-af7c-1eda890acee2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_019c7222-aab7-7027-9a86-56843c8336c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_019c7222-aab7-7027-9a86-56843c8336c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-776f-a9bf-8cdd87c413d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-776f-a9bf-8cdd87c413d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-72c8-af9e-acbc7f9b2c90" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-72c8-af9e-acbc7f9b2c90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c722d-8573-7c78-9267-9ea8581957b5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c722d-8573-7c78-9267-9ea8581957b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c722d-8573-728e-84a1-9d80fc8963da" xlink:href="viv-20251231.xsd#viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c722d-8573-728e-84a1-9d80fc8963da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c722d-8573-7575-ac33-5c9b2146c20b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c722d-8573-7575-ac33-5c9b2146c20b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentLiabilities_019c722d-8573-7761-a093-828023595dab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_OtherCurrentLiabilities_019c722d-8573-7761-a093-828023595dab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAssets_019c722d-8573-7b6c-87fe-30a267dcd40a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_OtherAssets_019c722d-8573-7b6c-87fe-30a267dcd40a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-7c3f-a665-bdcd7c6eb476" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-7c3f-a665-bdcd7c6eb476" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-7c3f-9a40-b5dab0a70d65" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-7c3f-9a40-b5dab0a70d65" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentLoansFinancialInstitutions_019c722d-8573-7b7b-83fd-edf39999cabf" xlink:href="viv-20251231.xsd#viv_NonCurrentLoansFinancialInstitutions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_NonCurrentLoansFinancialInstitutions_019c722d-8573-7b7b-83fd-edf39999cabf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets_019c722d-8573-7c09-817e-a9aa29af0a75" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_OtherNoncurrentAssets_019c722d-8573-7c09-817e-a9aa29af0a75" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionAndCollection_019c722d-8573-71d5-b722-1c86e8bb4680" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionAndCollection"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_IncomeTaxAndSocialContributionAndCollection_019c722d-8573-71d5-b722-1c86e8bb4680" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c722d-8573-7e04-9904-0d71ef714f89" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c722d-8573-7e04-9904-0d71ef714f89" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-743d-9dbe-5330ca3bc16c" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-743d-9dbe-5330ca3bc16c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-7a95-9306-b00a6e5ea3c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-7a95-9306-b00a6e5ea3c1" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c722d-8573-74e3-9456-374fb4b54084" xlink:href="viv-20251231.xsd#viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c722d-8573-74e3-9456-374fb4b54084" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-7ac7-9cb9-fec5bb011aff" xlink:href="viv-20251231.xsd#viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c722d-8573-7ac7-9cb9-fec5bb011aff" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesAssumedAsOfAcquisitionDate_019c722d-8573-7892-bbbd-b8eca79275a3" xlink:href="viv-20251231.xsd#viv_LiabilitiesAssumedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_viv_LiabilitiesAssumedAsOfAcquisitionDate_019c722d-8573-7892-bbbd-b8eca79275a3" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c722d-8573-760e-9298-11f320e99b27" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c722d-8573-760e-9298-11f320e99b27" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-73e9-8be6-f1ab58b1b5f4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c722d-8573-73e9-8be6-f1ab58b1b5f4" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c722d-8573-7190-8b4d-882f5335f7ee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7222-aab7-7c3d-b4a6-5ee81a2d04c5" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c722d-8573-7190-8b4d-882f5335f7ee" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATIONSDetail2" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATIONSDetail2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATIONSDetail2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c727a-c80f-7cd9-a34d-3d29ee126dae" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c727a-c80f-7cd9-a34d-3d29ee126dae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c727a-c80f-7ec9-9dce-922d249bddc8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c727a-c80f-7cd9-a34d-3d29ee126dae" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c727a-c80f-7ec9-9dce-922d249bddc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c727a-c80f-7ec9-9dce-922d249bddc8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c727a-c80f-7ec9-9dce-922d249bddc8" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c727a-c80f-7ec9-9dce-922d249bddc8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c727a-c80f-7e7d-9e66-0adc48e6b7d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c727a-c80f-7ec9-9dce-922d249bddc8" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c727a-c80f-7e7d-9e66-0adc48e6b7d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c727a-c80f-707b-816b-fc2566cabfe3" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c727a-c80f-7e7d-9e66-0adc48e6b7d1" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c727a-c80f-707b-816b-fc2566cabfe3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-71e7-b9b3-41fed1cc3ff1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-71e7-b9b3-41fed1cc3ff1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c727a-c80f-76e9-8b64-6128aba14e6e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c727a-c80f-76e9-8b64-6128aba14e6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c727a-c80f-722d-aaea-a38471c2e20f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c727a-c80f-722d-aaea-a38471c2e20f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAssets_019c727a-c80f-7cdc-bdc8-d76d713ca6a5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_OtherAssets_019c727a-c80f-7cdc-bdc8-d76d713ca6a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-7353-b938-d7e6143ac21c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-7353-b938-d7e6143ac21c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets_019c727a-c80f-7e32-9a84-e277668c7da5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_OtherNoncurrentAssets_019c727a-c80f-7e32-9a84-e277668c7da5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c727a-c80f-7623-a300-7233cb1a2517" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c727a-c80f-7623-a300-7233cb1a2517" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-766f-93b1-ae920f68780d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c727a-c80f-766f-93b1-ae920f68780d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7657-bc9d-7f6d-87fa-81f7f1709a82" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7657-bc9d-7f6d-87fa-81f7f1709a82" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c7657-bc9d-70b2-a83e-b2f471580425" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwill_019c7657-bc9d-70b2-a83e-b2f471580425" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SuppliersRecognisedAsOfAcquisitionDate_019c7664-61ec-7369-b688-a133e07296cc" xlink:href="viv-20251231.xsd#viv_SuppliersRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_SuppliersRecognisedAsOfAcquisitionDate_019c7664-61ec-7369-b688-a133e07296cc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7658-9166-7565-bfab-2fd405575b46" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7658-9166-7565-bfab-2fd405575b46" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentLiabilities_019c7659-f467-7348-a2a7-fba8ac0b0e10" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_OtherCurrentLiabilities_019c7659-f467-7348-a2a7-fba8ac0b0e10" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7659-f467-7672-92fe-62da7041c99e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7659-f467-7672-92fe-62da7041c99e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentDebenturesRecognisedAsOfAcquisitionDate_019c7665-29d8-794b-af98-d01859236985" xlink:href="viv-20251231.xsd#viv_NonCurrentDebenturesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_NonCurrentDebenturesRecognisedAsOfAcquisitionDate_019c7665-29d8-794b-af98-d01859236985" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentLeasesRecognisedAsOfAcquisitionDate_019c7666-0366-78cb-b7eb-0b7614540d18" xlink:href="viv-20251231.xsd#viv_NonCurrentLeasesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_NonCurrentLeasesRecognisedAsOfAcquisitionDate_019c7666-0366-78cb-b7eb-0b7614540d18" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c765c-7ab0-7dad-9026-4bbd0ea41fcf" xlink:href="viv-20251231.xsd#viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c765c-7ab0-7dad-9026-4bbd0ea41fcf" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c765c-f49d-79ad-a933-28d47391d916" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c765c-f49d-79ad-a933-28d47391d916" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c765d-5b0d-7dc4-be54-8efe3248f916" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c765d-5b0d-7dc4-be54-8efe3248f916" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate_019c7667-23cc-7ab2-ab5a-e3be697798ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_NoncontrollingInterestInAcquireeRecognisedAtAcquisitionDate_019c7667-23cc-7ab2-ab5a-e3be697798ea" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c765d-b6e6-7112-8050-cea104f0d4e7" xlink:href="viv-20251231.xsd#viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c765d-b6e6-7112-8050-cea104f0d4e7" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentPersonalBenefitsRecognisedAsOfAcquisitionDate_019c7666-b5ad-7836-90dd-173838eca042" xlink:href="viv-20251231.xsd#viv_NonCurrentPersonalBenefitsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_NonCurrentPersonalBenefitsRecognisedAsOfAcquisitionDate_019c7666-b5ad-7836-90dd-173838eca042" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfTheNetAssets_019c765e-ffcd-720c-9dc6-cc1c09100f87" xlink:href="viv-20251231.xsd#viv_FairValueOfTheNetAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_FairValueOfTheNetAssets_019c765e-ffcd-720c-9dc6-cc1c09100f87" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInterestsOfAcquirer_019c7667-8842-7978-85fd-4345148240bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityInterestsOfAcquirer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_EquityInterestsOfAcquirer_019c7667-8842-7978-85fd-4345148240bd" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentDebenturesRecognisedAsOfAcquisitionDate_019c7685-e5ff-7c1e-b32c-993d45197f3c" xlink:href="viv-20251231.xsd#viv_CurrentDebenturesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_CurrentDebenturesRecognisedAsOfAcquisitionDate_019c7685-e5ff-7c1e-b32c-993d45197f3c" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentLeasesRecognisedAsOfAcquisitionDate_019c7685-e5ff-78a8-80f9-40c14b1a1e84" xlink:href="viv-20251231.xsd#viv_CurrentLeasesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_CurrentLeasesRecognisedAsOfAcquisitionDate_019c7685-e5ff-78a8-80f9-40c14b1a1e84" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentPersonalBenefitsRecognisedAsOfAcquisitionDate_019c7685-e5ff-73e7-b5f5-0d2a1c828e6c" xlink:href="viv-20251231.xsd#viv_CurrentPersonalBenefitsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_viv_CurrentPersonalBenefitsRecognisedAsOfAcquisitionDate_019c7685-e5ff-73e7-b5f5-0d2a1c828e6c" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7687-6efc-7ea0-961b-b1daed1f919c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c727a-c80f-76d6-876d-35b98530c279" xlink:to="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7687-6efc-7ea0-961b-b1daed1f919c" xlink:type="arc" order="27"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATIONSDetail3" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATIONSDetail3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATIONSDetail3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c723a-f5d7-79c2-9222-d8a91dc5e24e" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c723a-f5d7-79c2-9222-d8a91dc5e24e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7601-718c-7bdf-bc63-809825920d72" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c723a-f5d7-79c2-9222-d8a91dc5e24e" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7601-718c-7bdf-bc63-809825920d72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7bdf-bc63-809825920d72_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7601-718c-7bdf-bc63-809825920d72" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7bdf-bc63-809825920d72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7676-be72-2747dfb45495" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7601-718c-7bdf-bc63-809825920d72" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7676-be72-2747dfb45495" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c7601-718c-7ab8-b56c-d4916e3c6d6d" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7676-be72-2747dfb45495" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c7601-718c-7ab8-b56c-d4916e3c6d6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c7656-3aa1-7680-845a-f070bf4de9a9" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7676-be72-2747dfb45495" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c7656-3aa1-7680-845a-f070bf4de9a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CyberCoBrasilMember_019c7713-76e7-7837-869b-df5abc63283d" xlink:href="viv-20251231.xsd#viv_CyberCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7601-718c-7676-be72-2747dfb45495" xlink:to="loc_viv_CyberCoBrasilMember_019c7713-76e7-7837-869b-df5abc63283d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7601-718c-75c0-9407-b72e413023d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c723a-f5d7-79c2-9222-d8a91dc5e24e" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7601-718c-75c0-9407-b72e413023d5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-75c0-9407-b72e413023d5_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7601-718c-75c0-9407-b72e413023d5" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-75c0-9407-b72e413023d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-7eb3-bf8d-84d661cd7560" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7601-718c-75c0-9407-b72e413023d5" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-7eb3-bf8d-84d661cd7560" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c7601-718c-7b92-baf3-126cb8a74984" xlink:href="viv-20251231.xsd#viv_TelefnicaInfraestruturaESeguranaLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-7eb3-bf8d-84d661cd7560" xlink:to="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c7601-718c-7b92-baf3-126cb8a74984" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TISMember_019c7714-2a69-7429-9ca5-29ea7d79740e" xlink:href="viv-20251231.xsd#viv_TISMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7601-718c-7eb3-bf8d-84d661cd7560" xlink:to="loc_viv_TISMember_019c7714-2a69-7429-9ca5-29ea7d79740e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsAbstract_019c7602-5ef9-7baf-a0d9-1ce8abb06abf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_ifrs-full_AssetsAbstract_019c7602-5ef9-7baf-a0d9-1ce8abb06abf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_019c7602-5ef9-7baf-a0d9-1ce8abb06abf" xlink:to="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-79cd-b2dc-3f95c93c2bb1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:to="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-79cd-b2dc-3f95c93c2bb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c7601-718c-73a0-8a56-616078122a5c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:to="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c7601-718c-73a0-8a56-616078122a5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeAndOtherReceivablesRecognisedAsOfAcquisitionDate_019c7615-6d7a-7e2a-a860-9d746c1d1f6f" xlink:href="viv-20251231.xsd#viv_TradeAndOtherReceivablesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:to="loc_viv_TradeAndOtherReceivablesRecognisedAsOfAcquisitionDate_019c7615-6d7a-7e2a-a860-9d746c1d1f6f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate_019c7618-2f0a-7481-a4e1-82a8c06423e4" xlink:href="viv-20251231.xsd#viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_019c7603-18e9-7ba9-a6d4-b6444df62991" xlink:to="loc_viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate_019c7618-2f0a-7481-a4e1-82a8c06423e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_019c7602-5ef9-7baf-a0d9-1ce8abb06abf" xlink:to="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-7a0f-800f-4f77d20e8300" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:to="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-7a0f-800f-4f77d20e8300" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7657-2f89-7a32-98a3-b1f33034f41c" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:to="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7657-2f89-7a32-98a3-b1f33034f41c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7611-f38d-7c66-a80d-4805389dfebb" xlink:href="viv-20251231.xsd#viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:to="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7611-f38d-7c66-a80d-4805389dfebb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c7601-718c-75ad-86db-a7acaf47e796" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c7601-718c-75ad-86db-a7acaf47e796" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c7633-f3f6-7d30-8982-b770c07e250b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_019c7603-5418-7cc5-9fc1-77e570b7a758" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c7633-f3f6-7d30-8982-b770c07e250b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-705d-8070-d1dc56de7363" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_019c7602-5ef9-7baf-a0d9-1ce8abb06abf" xlink:to="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7601-718c-705d-8070-d1dc56de7363" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesAbstract_019c7604-bad3-7d7e-baeb-4572907eb088" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_ifrs-full_LiabilitiesAbstract_019c7604-bad3-7d7e-baeb-4572907eb088" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesAbstract_019c7604-e180-7ff4-a700-f4415d6d48f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_019c7604-bad3-7d7e-baeb-4572907eb088" xlink:to="loc_ifrs-full_CurrentLiabilitiesAbstract_019c7604-e180-7ff4-a700-f4415d6d48f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-70b9-9fc9-a73deae42dac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_019c7604-e180-7ff4-a700-f4415d6d48f2" xlink:to="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-70b9-9fc9-a73deae42dac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c7601-718c-741c-8ed0-3a82640e5fec" xlink:href="viv-20251231.xsd#viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_019c7604-e180-7ff4-a700-f4415d6d48f2" xlink:to="loc_viv_CurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c7601-718c-741c-8ed0-3a82640e5fec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c7623-d5fe-7335-a1e1-e2a8dab5ef35" xlink:href="viv-20251231.xsd#viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_019c7604-e180-7ff4-a700-f4415d6d48f2" xlink:to="loc_viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c7623-d5fe-7335-a1e1-e2a8dab5ef35" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_019c7604-bad3-7d7e-baeb-4572907eb088" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-7bb1-932e-59f1a3e9293a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-7bb1-932e-59f1a3e9293a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c7625-5cfe-728d-84d5-1f97205d12e1" xlink:href="viv-20251231.xsd#viv_NonCurrentLoansAndFinancingRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_viv_NonCurrentLoansAndFinancingRecognizedAtTheAcquisitionDate_019c7625-5cfe-728d-84d5-1f97205d12e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c762a-8057-71fa-b666-93a1f09020c6" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_viv_IncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c762a-8057-71fa-b666-93a1f09020c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-774b-b0ed-f4fd6ea8470a" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_viv_DeferredIncomeTaxAndSocialContributionLiabilitiesRecognisedAsOfAcquisitionDate_019c7601-718c-774b-b0ed-f4fd6ea8470a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c7601-718c-76fa-9e6c-057ede2d263f" xlink:href="viv-20251231.xsd#viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c7601-718c-76fa-9e6c-057ede2d263f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNonCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c762b-e1be-797b-802b-faa02fd938b7" xlink:href="viv-20251231.xsd#viv_OtherNonCurrentLiabilitiesRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_019c7605-187f-7c4c-84f2-503071b063ce" xlink:to="loc_viv_OtherNonCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c762b-e1be-797b-802b-faa02fd938b7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesAssumedAsOfAcquisitionDate_019c7601-718c-7247-bca3-5f4c2f47f4d4" xlink:href="viv-20251231.xsd#viv_LiabilitiesAssumedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_019c7604-bad3-7d7e-baeb-4572907eb088" xlink:to="loc_viv_LiabilitiesAssumedAsOfAcquisitionDate_019c7601-718c-7247-bca3-5f4c2f47f4d4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_019c7685-4491-7100-86cb-fa7eba2e8de1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_019c7685-4491-7100-86cb-fa7eba2e8de1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c7685-4491-7e95-b0ac-dacc0de47721" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_019c7685-4491-7e95-b0ac-dacc0de47721" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c7685-4491-7a12-ae4a-6b9473ae76a5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c723a-f5d7-7819-8550-89071178129d" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c7685-4491-7a12-ae4a-6b9473ae76a5" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATIONSDetail4" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATIONSDetail4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATIONSDetail4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c7714-7097-72ad-8bd6-37ff6147ea8d" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c7714-7097-72ad-8bd6-37ff6147ea8d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7714-7097-7af0-87ce-faec7cc0d0ce" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c7714-7097-72ad-8bd6-37ff6147ea8d" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7714-7097-7af0-87ce-faec7cc0d0ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7714-7097-7af0-87ce-faec7cc0d0ce_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7714-7097-7af0-87ce-faec7cc0d0ce" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7714-7097-7af0-87ce-faec7cc0d0ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7714-7097-715d-a984-3459d520c3be" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7714-7097-7af0-87ce-faec7cc0d0ce" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7714-7097-715d-a984-3459d520c3be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CyberCoBrasilMember_019c7714-7097-73b3-a72d-f03b048abdca" xlink:href="viv-20251231.xsd#viv_CyberCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7714-7097-715d-a984-3459d520c3be" xlink:to="loc_viv_CyberCoBrasilMember_019c7714-7097-73b3-a72d-f03b048abdca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7714-7097-7506-80d8-821883b73044" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c7714-7097-72ad-8bd6-37ff6147ea8d" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7714-7097-7506-80d8-821883b73044" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7714-7097-7506-80d8-821883b73044_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7714-7097-7506-80d8-821883b73044" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7714-7097-7506-80d8-821883b73044_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7714-7097-7021-a929-2522be379a54" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7714-7097-7506-80d8-821883b73044" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7714-7097-7021-a929-2522be379a54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TISMember_019c7714-7097-72f6-b7e3-b84ebb36abba" xlink:href="viv-20251231.xsd#viv_TISMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7714-7097-7021-a929-2522be379a54" xlink:to="loc_viv_TISMember_019c7714-7097-72f6-b7e3-b84ebb36abba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-705f-8093-a6a5855306ca" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-705f-8093-a6a5855306ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-7b1c-866e-542e71c12830" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-7b1c-866e-542e71c12830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SuppliersRecognisedAsOfAcquisitionDate_019c7714-7097-7478-98e0-be8c8ee1471e" xlink:href="viv-20251231.xsd#viv_SuppliersRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_SuppliersRecognisedAsOfAcquisitionDate_019c7714-7097-7478-98e0-be8c8ee1471e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c7714-7097-7444-97fd-4054ced0fc60" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_019c7714-7097-7444-97fd-4054ced0fc60" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c7714-7097-7c8e-a320-876647c91ff9" xlink:href="viv-20251231.xsd#viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_ProvisionsNonCurrentRecognisedAsOfAcquisitionDate_019c7714-7097-7c8e-a320-876647c91ff9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-7bcc-900f-9843dd24dec9" xlink:href="viv-20251231.xsd#viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_OtherCurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-7bcc-900f-9843dd24dec9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c7714-7097-70db-b3d0-8d15d34f7fdf" xlink:href="viv-20251231.xsd#viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_OtherCurrentLiabilitiesRecognizedAtTheAcquisitionDate_019c7714-7097-70db-b3d0-8d15d34f7fdf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-76a2-9e8c-c45538ae741f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-76a2-9e8c-c45538ae741f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-74d4-8742-ac15b6bb3625" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-74d4-8742-ac15b6bb3625" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7714-7097-70c4-858d-cfaa177bec14" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_DeferredIncomeTaxAndSocialSecurityContributionsRecognisedAsOfAcquisitionDate_019c7714-7097-70c4-858d-cfaa177bec14" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-7809-9bc9-f28a6d690cbb" xlink:href="viv-20251231.xsd#viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_OtherNonCurrentLiabilitiesRecognisedAsOfAcquisitionDate_019c7714-7097-7809-9bc9-f28a6d690cbb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-7126-b936-21a0d24d2334" xlink:href="viv-20251231.xsd#viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-7126-b936-21a0d24d2334" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c7714-7097-73d7-a64d-781589c0d6b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentRecognisedAsOfAcquisitionDate_019c7714-7097-73d7-a64d-781589c0d6b9" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-71aa-9f98-7692e7e5d4ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-71aa-9f98-7692e7e5d4ae" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-79a8-844c-ddcd4cb9f4e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_ifrs-full_FinancialAssetsRecognisedAsOfAcquisitionDate_019c7714-7097-79a8-844c-ddcd4cb9f4e8" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfTheNetAssets_019c7714-7097-7009-a030-67dcd72b53cd" xlink:href="viv-20251231.xsd#viv_FairValueOfTheNetAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7714-7097-7b90-b904-691ed8e2ddd0" xlink:to="loc_viv_FairValueOfTheNetAssets_019c7714-7097-7009-a030-67dcd72b53cd" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATIONSAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATIONSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATIONSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7218-f767-777c-ab42-16d918dd8778" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7218-f767-777c-ab42-16d918dd8778" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-777c-ab42-16d918dd8778_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7218-f767-777c-ab42-16d918dd8778" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-777c-ab42-16d918dd8778_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7218-f767-777c-ab42-16d918dd8778" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c7218-f767-7573-984a-7b64ee8fd1c1" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c7218-f767-7573-984a-7b64ee8fd1c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c75f9-59dd-7552-b369-6a6d55cac3d7" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c75f9-59dd-7552-b369-6a6d55cac3d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c76f7-4653-75d1-bb21-a00ac4b0f7b9" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c76f7-4653-75d1-bb21-a00ac4b0f7b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c763e-5694-7822-9822-5ef815986f9b" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c763e-5694-7822-9822-5ef815986f9b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivaEAndVivoVenturesMember_019c767d-7e3b-7282-8c68-794e3982102e" xlink:href="viv-20251231.xsd#viv_VivaEAndVivoVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_VivaEAndVivoVenturesMember_019c767d-7e3b-7282-8c68-794e3982102e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayIIIInvestmentFundInCreditRightsMember_019c7709-8c37-7956-a7c7-28bfd77a7f34" xlink:href="viv-20251231.xsd#viv_VivoPayIIIInvestmentFundInCreditRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_VivoPayIIIInvestmentFundInCreditRightsMember_019c7709-8c37-7956-a7c7-28bfd77a7f34" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CyberCoBrasilMember_019c7727-822e-704d-83a3-fd75ac386dff" xlink:href="viv-20251231.xsd#viv_CyberCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7218-f767-7a71-8575-06df722ca0c0" xlink:to="loc_viv_CyberCoBrasilMember_019c7727-822e-704d-83a3-fd75ac386dff" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c7219-1e9e-7627-b4e2-ca455c5f253b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c7219-1e9e-7627-b4e2-ca455c5f253b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-7627-b4e2-ca455c5f253b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c7219-1e9e-7627-b4e2-ca455c5f253b" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-7627-b4e2-ca455c5f253b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-73ac-af7e-952818d691f9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c7219-1e9e-7627-b4e2-ca455c5f253b" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-73ac-af7e-952818d691f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_019c7219-1e9e-79f3-acd2-b1f73b47ce0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-73ac-af7e-952818d691f9" xlink:to="loc_ifrs-full_BrandNamesMember_019c7219-1e9e-79f3-acd2-b1f73b47ce0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CommercialRelationshipMember_019c7219-4700-7460-88fa-e0b3fbf52465" xlink:href="viv-20251231.xsd#viv_CommercialRelationshipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-73ac-af7e-952818d691f9" xlink:to="loc_viv_CommercialRelationshipMember_019c7219-4700-7460-88fa-e0b3fbf52465" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CustomerPortfolioMember_019c7644-f637-7d12-89f1-b2956398e353" xlink:href="viv-20251231.xsd#viv_CustomerPortfolioMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c7219-1e9e-73ac-af7e-952818d691f9" xlink:to="loc_viv_CustomerPortfolioMember_019c7644-f637-7d12-89f1-b2956398e353" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c7250-42b9-70bc-b2f6-437a7af44e19" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_MaturityAxis_019c7250-42b9-70bc-b2f6-437a7af44e19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c7250-42b9-70bc-b2f6-437a7af44e19_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c7250-42b9-70bc-b2f6-437a7af44e19" xlink:to="loc_ifrs-full_MaturityDomain_019c7250-42b9-70bc-b2f6-437a7af44e19_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c7250-42b9-70bc-b2f6-437a7af44e19" xlink:to="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2024Member_019c7657-6186-773c-95bb-053cbbe8ddb4" xlink:href="viv-20251231.xsd#viv_A2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:to="loc_viv_A2024Member_019c7657-6186-773c-95bb-053cbbe8ddb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2025Member_019c7250-42b9-7879-b1c1-c9220e695816" xlink:href="viv-20251231.xsd#viv_A2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:to="loc_viv_A2025Member_019c7250-42b9-7879-b1c1-c9220e695816" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2026Member_019c7250-42b9-7555-99b9-74d68d6940d2" xlink:href="viv-20251231.xsd#viv_A2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:to="loc_viv_A2026Member_019c7250-42b9-7555-99b9-74d68d6940d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2033Member_019c7657-e097-7047-83f5-3f00f4c7ff3f" xlink:href="viv-20251231.xsd#viv_A2033Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:to="loc_viv_A2033Member_019c7657-e097-7047-83f5-3f00f4c7ff3f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2034Member_019c7250-42b9-7e2b-8b79-a7a9d05b85ed" xlink:href="viv-20251231.xsd#viv_A2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c7250-42b9-70eb-9e17-79f7ad9b1c26" xlink:to="loc_viv_A2034Member_019c7250-42b9-7e2b-8b79-a7a9d05b85ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfPaymentAxis_019c725e-1d31-7489-9f5c-942fbc9e2bd1" xlink:href="viv-20251231.xsd#viv_TypeOfPaymentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_viv_TypeOfPaymentAxis_019c725e-1d31-7489-9f5c-942fbc9e2bd1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfPaymentDomain_019c725e-1d31-7489-9f5c-942fbc9e2bd1_default" xlink:href="viv-20251231.xsd#viv_TypeOfPaymentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypeOfPaymentAxis_019c725e-1d31-7489-9f5c-942fbc9e2bd1" xlink:to="loc_viv_TypeOfPaymentDomain_019c725e-1d31-7489-9f5c-942fbc9e2bd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfPaymentDomain_019c725e-1d31-70df-a3ab-3f022812e550" xlink:href="viv-20251231.xsd#viv_TypeOfPaymentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypeOfPaymentAxis_019c725e-1d31-7489-9f5c-942fbc9e2bd1" xlink:to="loc_viv_TypeOfPaymentDomain_019c725e-1d31-70df-a3ab-3f022812e550" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentInCashMember_019c725e-1d31-7bf5-92e4-e0f511a8f7ff" xlink:href="viv-20251231.xsd#viv_PaymentInCashMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfPaymentDomain_019c725e-1d31-70df-a3ab-3f022812e550" xlink:to="loc_viv_PaymentInCashMember_019c725e-1d31-7bf5-92e4-e0f511a8f7ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentAccordingToContractualClausesIPCASELICMember_019c725e-1d31-70d5-b5cc-4500ab62bf99" xlink:href="viv-20251231.xsd#viv_PaymentAccordingToContractualClausesIPCASELICMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfPaymentDomain_019c725e-1d31-70df-a3ab-3f022812e550" xlink:to="loc_viv_PaymentAccordingToContractualClausesIPCASELICMember_019c725e-1d31-70d5-b5cc-4500ab62bf99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameAxis_019c7267-76b3-7950-8f9a-b492fdb97016" xlink:href="viv-20251231.xsd#viv_ShareholdersNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_viv_ShareholdersNameAxis_019c7267-76b3-7950-8f9a-b492fdb97016" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameDomain_019c7267-76b3-7950-8f9a-b492fdb97016_default" xlink:href="viv-20251231.xsd#viv_ShareholdersNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_ShareholdersNameAxis_019c7267-76b3-7950-8f9a-b492fdb97016" xlink:to="loc_viv_ShareholdersNameDomain_019c7267-76b3-7950-8f9a-b492fdb97016_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameDomain_019c7267-76b3-7c2b-879e-00d5054cd604" xlink:href="viv-20251231.xsd#viv_ShareholdersNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_ShareholdersNameAxis_019c7267-76b3-7950-8f9a-b492fdb97016" xlink:to="loc_viv_ShareholdersNameDomain_019c7267-76b3-7c2b-879e-00d5054cd604" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ControllingShareholdersMember_019c7267-76b3-75eb-b329-74587a7c94fc" xlink:href="viv-20251231.xsd#viv_ControllingShareholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ShareholdersNameDomain_019c7267-76b3-7c2b-879e-00d5054cd604" xlink:to="loc_viv_ControllingShareholdersMember_019c7267-76b3-75eb-b329-74587a7c94fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c7267-76b3-7962-9861-72c88c7f5494" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c7267-76b3-7962-9861-72c88c7f5494" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7267-76b3-7962-9861-72c88c7f5494_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7267-76b3-7962-9861-72c88c7f5494" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7267-76b3-7962-9861-72c88c7f5494_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7267-76b3-7b2e-9595-f4bf47319991" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7267-76b3-7962-9861-72c88c7f5494" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7267-76b3-7b2e-9595-f4bf47319991" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember_019c7267-76b3-78e4-a6a7-b816fe59d414" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7267-76b3-7b2e-9595-f4bf47319991" xlink:to="loc_ifrs-full_IssuedCapitalMember_019c7267-76b3-78e4-a6a7-b816fe59d414" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c760f-80c0-769d-8525-a48c8e8f7f70" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_RangeAxis_019c760f-80c0-769d-8525-a48c8e8f7f70" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c760f-80c0-769d-8525-a48c8e8f7f70_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c760f-80c0-769d-8525-a48c8e8f7f70" xlink:to="loc_ifrs-full_RangeDomain_019c760f-80c0-769d-8525-a48c8e8f7f70_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c760f-80c0-7495-a081-112c9eed7142" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c760f-80c0-769d-8525-a48c8e8f7f70" xlink:to="loc_ifrs-full_RangeDomain_019c760f-80c0-7495-a081-112c9eed7142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c760f-b129-79d3-b87f-96908ec22625" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c760f-80c0-7495-a081-112c9eed7142" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c760f-b129-79d3-b87f-96908ec22625" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c7610-205f-75e7-ac50-1d9672de5ca5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c760f-80c0-7495-a081-112c9eed7142" xlink:to="loc_ifrs-full_TopOfRangeMember_019c7610-205f-75e7-ac50-1d9672de5ca5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c761c-22b3-7fb1-bfef-408ba361361f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2c14-7042-bab5-01acd2d0abe3" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c761c-22b3-7fb1-bfef-408ba361361f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7fb1-bfef-408ba361361f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c761c-22b3-7fb1-bfef-408ba361361f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7fb1-bfef-408ba361361f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7051-af7a-133206f3c967" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c761c-22b3-7fb1-bfef-408ba361361f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7051-af7a-133206f3c967" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaInfraS.L.UnipersonalMember_019c761c-e966-766c-b5a3-6161953b3080" xlink:href="viv-20251231.xsd#viv_TelefonicaInfraS.L.UnipersonalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7051-af7a-133206f3c967" xlink:to="loc_viv_TelefonicaInfraS.L.UnipersonalMember_019c761c-e966-766c-b5a3-6161953b3080" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c763e-f3c6-7854-84d6-8879eeaa8260" xlink:href="viv-20251231.xsd#viv_TelefnicaInfraestruturaESeguranaLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7051-af7a-133206f3c967" xlink:to="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c763e-f3c6-7854-84d6-8879eeaa8260" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TISMember_019c7727-822e-7dba-a5cc-0ea1421bdfb4" xlink:href="viv-20251231.xsd#viv_TISMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c761c-22b3-7051-af7a-133206f3c967" xlink:to="loc_viv_TISMember_019c7727-822e-7dba-a5cc-0ea1421bdfb4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ExecutionOfProjectsRelatedToInvestmentsAndMaintenanceOfTheSTFCService_019c7218-bc2b-7b1e-ba37-735247e68529" xlink:href="viv-20251231.xsd#viv_ExecutionOfProjectsRelatedToInvestmentsAndMaintenanceOfTheSTFCService"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_ExecutionOfProjectsRelatedToInvestmentsAndMaintenanceOfTheSTFCService_019c7218-bc2b-7b1e-ba37-735247e68529" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationToNetAssetsAcquired_019c7218-f767-7aa9-9575-49fd4bb70891" xlink:href="viv-20251231.xsd#viv_AllocationToNetAssetsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AllocationToNetAssetsAcquired_019c7218-f767-7aa9-9575-49fd4bb70891" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital_019c7218-f767-79c6-9008-d83f4bd428d3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_IssuedCapital_019c7218-f767-79c6-9008-d83f4bd428d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCompeteAgreementRecognizedSeparatelyFromTheBusinessCombinationAtFairValue_019c7218-f767-7dcb-81c8-65154e5942d3" xlink:href="viv-20251231.xsd#viv_NonCompeteAgreementRecognizedSeparatelyFromTheBusinessCombinationAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_NonCompeteAgreementRecognizedSeparatelyFromTheBusinessCombinationAtFairValue_019c7218-f767-7dcb-81c8-65154e5942d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TheFairValueOfTheBrand_019c7219-1e9e-7cea-bbcb-644423669cf4" xlink:href="viv-20251231.xsd#viv_TheFairValueOfTheBrand"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_TheFairValueOfTheBrand_019c7219-1e9e-7cea-bbcb-644423669cf4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AverageRoyaltyRateOnNetRevenue_019c7219-1e9e-7b02-8bd5-94182c90504e" xlink:href="viv-20251231.xsd#viv_AverageRoyaltyRateOnNetRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AverageRoyaltyRateOnNetRevenue_019c7219-1e9e-7b02-8bd5-94182c90504e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AfterTaxDiscountRate_019c7219-1e9e-72a1-b9a1-8594ffd24d75" xlink:href="viv-20251231.xsd#viv_AfterTaxDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AfterTaxDiscountRate_019c7219-1e9e-72a1-b9a1-8594ffd24d75" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxRateAccordingToBrazilianTaxLaw_019c7219-1e9e-7b72-b2ed-54aff374f478" xlink:href="viv-20251231.xsd#viv_TaxRateAccordingToBrazilianTaxLaw"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_TaxRateAccordingToBrazilianTaxLaw_019c7219-1e9e-7b72-b2ed-54aff374f478" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_019c7219-1e9e-7ac9-879b-260c15d41cdb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_019c7219-1e9e-7ac9-879b-260c15d41cdb" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfTheBusinessRelationship_019c7219-4700-7f47-a2e7-eb2f24daf272" xlink:href="viv-20251231.xsd#viv_FairValueOfTheBusinessRelationship"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_FairValueOfTheBusinessRelationship_019c7219-4700-7f47-a2e7-eb2f24daf272" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RecognitionOfContingentLiabilities_019c7222-5102-73f8-b519-0a0489f07213" xlink:href="viv-20251231.xsd#viv_RecognitionOfContingentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_RecognitionOfContingentLiabilities_019c7222-5102-73f8-b519-0a0489f07213" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedImpactOnReductionCapacity_019c7250-42b9-7e12-bebe-27c4d1e9e3e3" xlink:href="viv-20251231.xsd#viv_EstimatedImpactOnReductionCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_EstimatedImpactOnReductionCapacity_019c7250-42b9-7e12-bebe-27c4d1e9e3e3" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProbabilityOfCompetitionIncreasesPercentage_019c7250-42b9-74bf-ba35-8ec1b3270ca5" xlink:href="viv-20251231.xsd#viv_ProbabilityOfCompetitionIncreasesPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_ProbabilityOfCompetitionIncreasesPercentage_019c7250-42b9-74bf-ba35-8ec1b3270ca5" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RevenueLoss_019c7250-42b9-70fc-85f7-72f6e0606cad" xlink:href="viv-20251231.xsd#viv_RevenueLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_RevenueLoss_019c7250-42b9-70fc-85f7-72f6e0606cad" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PerpetualGrowthRate_019c7250-42b9-7b59-ad05-00ad99ca7aa2" xlink:href="viv-20251231.xsd#viv_PerpetualGrowthRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PerpetualGrowthRate_019c7250-42b9-7b59-ad05-00ad99ca7aa2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfNonCompete_019c7250-42b9-7579-8459-419b675994c3" xlink:href="viv-20251231.xsd#viv_FairValueOfNonCompete"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_FairValueOfNonCompete_019c7250-42b9-7579-8459-419b675994c3" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmortizationPeriodOfNonCompeteClause_019c7250-42b9-79fa-a337-124f1e3a80d6" xlink:href="viv-20251231.xsd#viv_AmortizationPeriodOfNonCompeteClause"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AmortizationPeriodOfNonCompeteClause_019c7250-42b9-79fa-a337-124f1e3a80d6" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentOfNonCompeteClause_019c725e-1d31-7a8d-af0b-88df49894df2" xlink:href="viv-20251231.xsd#viv_PaymentOfNonCompeteClause"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PaymentOfNonCompeteClause_019c725e-1d31-7a8d-af0b-88df49894df2" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ContingentConsiderationConditionalUponAchievingPerformanceTargets_019c725e-1d31-774c-8583-eb591c19fe2c" xlink:href="viv-20251231.xsd#viv_ContingentConsiderationConditionalUponAchievingPerformanceTargets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_ContingentConsiderationConditionalUponAchievingPerformanceTargets_019c725e-1d31-774c-8583-eb591c19fe2c" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FairValueOfAcquiredReceivables_019c725e-1d31-7446-babf-3512443ffd28" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FairValueOfAcquiredReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_FairValueOfAcquiredReceivables_019c725e-1d31-7446-babf-3512443ffd28" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossContractualAmountsReceivableForAcquiredReceivables_019c725e-1d31-7042-9e6d-b362dbcbaf2a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossContractualAmountsReceivableForAcquiredReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_GrossContractualAmountsReceivableForAcquiredReceivables_019c725e-1d31-7042-9e6d-b362dbcbaf2a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLossRecognizedUponAcquisition_019c725e-1d31-76c0-8e91-0dbb64793bd2" xlink:href="viv-20251231.xsd#viv_ProvisionForLossRecognizedUponAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_ProvisionForLossRecognizedUponAcquisition_019c725e-1d31-76c0-8e91-0dbb64793bd2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetOperatingRevenue_019c725e-1d31-7574-b870-53e6a9d9936e" xlink:href="viv-20251231.xsd#viv_NetOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_NetOperatingRevenue_019c725e-1d31-7574-b870-53e6a9d9936e" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c725e-1d31-7861-9754-77ba095b62a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_ProfitLoss_019c725e-1d31-7861-9754-77ba095b62a0" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfSharesIssued_019c7267-76b3-7ca5-a9c4-af55b3fa845c" xlink:href="viv-20251231.xsd#viv_PercentageOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PercentageOfSharesIssued_019c7267-76b3-7ca5-a9c4-af55b3fa845c" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmortizationPeriod_019c7267-d7e7-7c44-ac4e-3b43e0d679a2" xlink:href="viv-20251231.xsd#viv_AmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AmortizationPeriod_019c7267-d7e7-7c44-ac4e-3b43e0d679a2" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_019c7605-a612-71a9-a6d1-ea9d9590e7e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransactionsWithOwners_019c7605-a612-71a9-a6d1-ea9d9590e7e4" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TotalShareCapital_019c760b-db4e-765e-8c68-18ad12126ffc" xlink:href="viv-20251231.xsd#viv_TotalShareCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_TotalShareCapital_019c760b-db4e-765e-8c68-18ad12126ffc" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInterestsOfAcquirer_019c7635-2cf1-7f1b-bc6d-c078409a0597" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityInterestsOfAcquirer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_EquityInterestsOfAcquirer_019c7635-2cf1-7f1b-bc6d-c078409a0597" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c763e-5694-7790-97c7-c9b2e38484de" xlink:href="viv-20251231.xsd#viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_OtherNoncurrentAssetsRecognisedAsOfAcquisitionDate_019c763e-5694-7790-97c7-c9b2e38484de" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c763e-f3c6-7b74-be1a-6425c34e2adb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_019c763e-f3c6-7b74-be1a-6425c34e2adb" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates_019c7648-14bf-729f-a64f-1355695b5076" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_AdjustmentsForGainLossOnDisposalOfInvestmentsInSubsidiariesJointVenturesAndAssociates_019c7648-14bf-729f-a64f-1355695b5076" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfTheFixedAndIntangibleAssets_019c764f-dae2-790b-8fc2-077636ba7b12" xlink:href="viv-20251231.xsd#viv_FairValueOfTheFixedAndIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_FairValueOfTheFixedAndIntangibleAssets_019c764f-dae2-790b-8fc2-077636ba7b12" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesIncurred_019c7652-d853-7bb5-ad70-27cd40a0ec09" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilitiesIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_LiabilitiesIncurred_019c7652-d853-7bb5-ad70-27cd40a0ec09" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialContributionOnTheAllocationOfFairValueAttributedToTheContingentLiability_019c7678-550e-73bb-8d32-bda044a16d9c" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialContributionOnTheAllocationOfFairValueAttributedToTheContingentLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_DeferredIncomeTaxAndSocialContributionOnTheAllocationOfFairValueAttributedToTheContingentLiability_019c7678-550e-73bb-8d32-bda044a16d9c" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PPEFairValueAttributedToFixedAssetItems_019c7679-c4dc-7ebb-a832-68fa9c69e0a6" xlink:href="viv-20251231.xsd#viv_PPEFairValueAttributedToFixedAssetItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PPEFairValueAttributedToFixedAssetItems_019c7679-c4dc-7ebb-a832-68fa9c69e0a6" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PPEFairValueAttributedToRightOfUseAssets_019c767a-69d5-7874-a7db-67a22163ed10" xlink:href="viv-20251231.xsd#viv_PPEFairValueAttributedToRightOfUseAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PPEFairValueAttributedToRightOfUseAssets_019c767a-69d5-7874-a7db-67a22163ed10" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfFairValueAttributedToIntangibleAssets_019c767d-213f-7e3f-85c3-bd1bf10e23a5" xlink:href="viv-20251231.xsd#viv_AllocationOfFairValueAttributedToIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_AllocationOfFairValueAttributedToIntangibleAssets_019c767d-213f-7e3f-85c3-bd1bf10e23a5" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueAttributedToTheContingentLiabilityUpdatedByTheSELICRate_019c767e-a746-709c-aeee-4dceb37e25eb" xlink:href="viv-20251231.xsd#viv_FairValueAttributedToTheContingentLiabilityUpdatedByTheSELICRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_FairValueAttributedToTheContingentLiabilityUpdatedByTheSELICRate_019c767e-a746-709c-aeee-4dceb37e25eb" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentForPartOfTheQuotasAlreadySubscribed_019c76f2-d1dd-751d-bb16-3091140cc2c7" xlink:href="viv-20251231.xsd#viv_PaymentForPartOfTheQuotasAlreadySubscribed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PaymentForPartOfTheQuotasAlreadySubscribed_019c76f2-d1dd-751d-bb16-3091140cc2c7" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BrandCostAndExpenses_019c76fa-8781-7285-9062-eb40563a2f61" xlink:href="viv-20251231.xsd#viv_BrandCostAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_BrandCostAndExpenses_019c76fa-8781-7285-9062-eb40563a2f61" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty_019c76fb-5885-740a-bcf1-4061dc4de15f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty_019c76fb-5885-740a-bcf1-4061dc4de15f" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedPortfolioDecline_019c76fd-7d2f-7d3d-8a84-c32bcc726347" xlink:href="viv-20251231.xsd#viv_EstimatedPortfolioDecline"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_EstimatedPortfolioDecline_019c76fd-7d2f-7d3d-8a84-c32bcc726347" xlink:type="arc" order="42"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfTheCustomerPortfolio_019c7701-2bdb-7c78-84a5-9861af0e9d8d" xlink:href="viv-20251231.xsd#viv_FairValueOfTheCustomerPortfolio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_FairValueOfTheCustomerPortfolio_019c7701-2bdb-7c78-84a5-9861af0e9d8d" xlink:type="arc" order="43"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_019c770c-3292-7a1b-8f6b-873df02ac500" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_NumberOfSharesIssued_019c770c-3292-7a1b-8f6b-873df02ac500" xlink:type="arc" order="44"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital_019c770f-9b40-76e3-b971-d7392211d537" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InitialUnitNominalValue_019c7714-6148-77e9-9c7c-f54577521f6e" xlink:href="viv-20251231.xsd#viv_InitialUnitNominalValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_InitialUnitNominalValue_019c7714-6148-77e9-9c7c-f54577521f6e" xlink:type="arc" order="46"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdingInTheCompany_019c771a-d582-7851-bea3-5df7735b0108" xlink:href="viv-20251231.xsd#viv_ShareholdingInTheCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_ShareholdingInTheCompany_019c771a-d582-7851-bea3-5df7735b0108" xlink:type="arc" order="47"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherReserves_019c771c-4584-720b-8ae0-8f1fcadce5d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_OtherReserves_019c771c-4584-720b-8ae0-8f1fcadce5d2" xlink:type="arc" order="48"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PresentValueOfTheFinancingWithTTech_019c771d-fa0e-7f7d-b4b8-cacab76b751c" xlink:href="viv-20251231.xsd#viv_PresentValueOfTheFinancingWithTTech"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_PresentValueOfTheFinancingWithTTech_019c771d-fa0e-7f7d-b4b8-cacab76b751c" xlink:type="arc" order="49"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_019c7721-2023-7adf-9e54-cefd9f182790" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_ifrs-full_CashFlowsUsedInObtainingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities_019c7721-2023-7adf-9e54-cefd9f182790" xlink:type="arc" order="50"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InitialRecognitionOfTheInvestment_019c7722-760c-7762-a8b8-fb20441dc04b" xlink:href="viv-20251231.xsd#viv_InitialRecognitionOfTheInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfNatureOfOperationsLineItems_019c7218-bc2b-7ca7-ace9-639f0c1f8349" xlink:to="loc_viv_InitialRecognitionOfTheInvestment_019c7722-760c-7762-a8b8-fb20441dc04b" xlink:type="arc" order="51"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/CashandCashEquivalentsAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#CashandCashEquivalentsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/CashandCashEquivalentsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c47e8-d447-7cd2-b86c-036c8faae88a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c47e7-50e4-72aa-a3b6-ce824f2606f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c47e8-d447-7cd2-b86c-036c8faae88a" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c47e7-50e4-72aa-a3b6-ce824f2606f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c47e8-d447-761e-aca4-035114c50a88" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c47e7-50e4-72aa-a3b6-ce824f2606f1" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c47e8-d447-761e-aca4-035114c50a88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c47e8-d447-761e-aca4-035114c50a88_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c47e8-d447-761e-aca4-035114c50a88" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c47e8-d447-761e-aca4-035114c50a88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c47e8-d447-7546-a1d1-d58af27352a5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c47e8-d447-761e-aca4-035114c50a88" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c47e8-d447-7546-a1d1-d58af27352a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalTechnologyMemberMember_019c47e8-d447-77f8-9668-b9062d8ffeac" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalTechnologyMemberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c47e8-d447-7546-a1d1-d58af27352a5" xlink:to="loc_viv_TelefonicaGlobalTechnologyMemberMember_019c47e8-d447-77f8-9668-b9062d8ffeac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProportionOfAverageRemunerationOfShortTermInvestmentsCorrespondedToCdi_019c47e6-5523-7017-b569-dab6a3fa0647" xlink:href="viv-20251231.xsd#viv_ProportionOfAverageRemunerationOfShortTermInvestmentsCorrespondedToCdi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c47e8-d447-7cd2-b86c-036c8faae88a" xlink:to="loc_viv_ProportionOfAverageRemunerationOfShortTermInvestmentsCorrespondedToCdi_019c47e6-5523-7017-b569-dab6a3fa0647" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalents_019c47e8-d447-7518-a4c6-9e3599454681" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c47e8-d447-7cd2-b86c-036c8faae88a" xlink:to="loc_ifrs-full_CashAndCashEquivalents_019c47e8-d447-7518-a4c6-9e3599454681" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail1" xlink:type="simple" xlink:href="viv-20251231.xsd#TRADEACCOUNTSRECEIVABLEDetail1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-7c79-93d4-aac2ef45fa07" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-7c79-93d4-aac2ef45fa07" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7603-a929-8b8541de9258" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-7c79-93d4-aac2ef45fa07" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7603-a929-8b8541de9258" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7603-a929-8b8541de9258_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7603-a929-8b8541de9258" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7603-a929-8b8541de9258_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7892-a038-086d6ac89587" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7603-a929-8b8541de9258" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7892-a038-086d6ac89587" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c4274-2c14-721f-b206-1a098ac7f25b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7892-a038-086d6ac89587" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c4274-2c14-721f-b206-1a098ac7f25b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2c14-7457-bc26-21b22f66e9a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7892-a038-086d6ac89587" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2c14-7457-bc26-21b22f66e9a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeAndOtherReceivablesServicesAndGoods_019c4274-2c14-7e1e-b0ca-12f3ca73aa43" xlink:href="viv-20251231.xsd#viv_TradeAndOtherReceivablesServicesAndGoods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_TradeAndOtherReceivablesServicesAndGoods_019c4274-2c14-7e1e-b0ca-12f3ca73aa43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeAndOtherReceivablesInterconnectionAmounts_019c4274-2c14-7792-b26e-b95a9e3ccd2e" xlink:href="viv-20251231.xsd#viv_TradeAndOtherReceivablesInterconnectionAmounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_TradeAndOtherReceivablesInterconnectionAmounts_019c4274-2c14-7792-b26e-b95a9e3ccd2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InvestmentFundReceivables_019c4274-2c14-7b72-bafc-dda54dea3a9f" xlink:href="viv-20251231.xsd#viv_InvestmentFundReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_InvestmentFundReceivables_019c4274-2c14-7b72-bafc-dda54dea3a9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeReceivablesDueFromRelatedParties_019c4274-2c14-7987-bd08-15b15b8ef47f" xlink:href="viv-20251231.xsd#viv_TradeReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_TradeReceivablesDueFromRelatedParties_019c4274-2c14-7987-bd08-15b15b8ef47f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherReceivables_019c4274-2c14-770a-853d-2bc3615444bc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_ifrs-full_TradeAndOtherReceivables_019c4274-2c14-770a-853d-2bc3615444bc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c4274-2c14-775d-b4b1-7d3f63f93cd9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeAndOtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_019c4274-2c14-775d-b4b1-7d3f63f93cd9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentReceivables_019c4274-2c14-7c3b-83fd-3831a85a60fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_ifrs-full_NoncurrentReceivables_019c4274-2c14-7c3b-83fd-3831a85a60fb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeAndOtherReceivablesUnbilledAmounts_019c4274-2c14-7927-b9cc-8132402e3b8f" xlink:href="viv-20251231.xsd#viv_TradeAndOtherReceivablesUnbilledAmounts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-723c-aace-3628255d2db8" xlink:to="loc_viv_TradeAndOtherReceivablesUnbilledAmounts_019c4274-2c14-7927-b9cc-8132402e3b8f" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail2" xlink:type="simple" xlink:href="viv-20251231.xsd#TRADEACCOUNTSRECEIVABLEDetail2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-73dc-b814-6189533a2d01" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-700b-8594-eba833c50ab4" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-73dc-b814-6189533a2d01" xlink:to="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-700b-8594-eba833c50ab4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusAxis_019c4274-2c14-76ff-86af-4c5cacf727d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4274-2c14-700b-8594-eba833c50ab4" xlink:to="loc_ifrs-full_PastDueStatusAxis_019c4274-2c14-76ff-86af-4c5cacf727d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-76ff-86af-4c5cacf727d6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c4274-2c14-76ff-86af-4c5cacf727d6" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-76ff-86af-4c5cacf727d6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PastDueStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_PastDueStatusAxis_019c4274-2c14-76ff-86af-4c5cacf727d6" xlink:to="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentMember_019c4274-2c14-772f-8df1-baa822c62f89" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_CurrentMember_019c4274-2c14-772f-8df1-baa822c62f89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneMonthMember_019c4274-2c14-7218-8567-787467027768" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneMonthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_NotLaterThanOneMonthMember_019c4274-2c14-7218-8567-787467027768" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_019c4274-2c14-7b1c-a4ee-66ad6afa1462" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_LaterThanOneMonthAndNotLaterThanTwoMonthsMember_019c4274-2c14-7b1c-a4ee-66ad6afa1462" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_019c4274-2c14-7c94-ae40-8ad764b19ebe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_LaterThanTwoMonthsAndNotLaterThanThreeMonthsMember_019c4274-2c14-7c94-ae40-8ad764b19ebe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember_019c4274-2c14-73db-b4ee-1c1f34cdca87" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_LaterThanThreeMonthsAndNotLaterThanFourMonthsMember_019c4274-2c14-73db-b4ee-1c1f34cdca87" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourMonthsMember_019c4274-2c14-74e7-8094-0d9ddc3dd17f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourMonthsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PastDueStatusDomain_019c4274-2c14-775e-8c06-2991ab422e43" xlink:to="loc_ifrs-full_LaterThanFourMonthsMember_019c4274-2c14-74e7-8094-0d9ddc3dd17f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivables_019c4274-2c14-7d2a-825e-a92b43271f6e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c4274-2c14-73dc-b814-6189533a2d01" xlink:to="loc_ifrs-full_TradeReceivables_019c4274-2c14-7d2a-825e-a92b43271f6e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail3" xlink:type="simple" xlink:href="viv-20251231.xsd#TRADEACCOUNTSRECEIVABLEDetail3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c4274-2c14-7e44-8378-767d47e11cca" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c4274-2c14-7e44-8378-767d47e11cca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7074-b771-55935c6efa1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_019c4274-2c14-7e44-8378-767d47e11cca" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7074-b771-55935c6efa1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7074-b771-55935c6efa1e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7074-b771-55935c6efa1e" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-7074-b771-55935c6efa1e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-71f5-b7e2-f49dc0bfb50e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2c14-7074-b771-55935c6efa1e" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-71f5-b7e2-f49dc0bfb50e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2c14-7676-a9f1-7871b2b00083" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-71f5-b7e2-f49dc0bfb50e" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2c14-7676-a9f1-7871b2b00083" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AllowanceForCreditLossesMember_019c4274-2c14-75db-8c1c-09e6a92974da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AllowanceForCreditLossesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2c14-71f5-b7e2-f49dc0bfb50e" xlink:to="loc_ifrs-full_AllowanceForCreditLossesMember_019c4274-2c14-75db-8c1c-09e6a92974da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractAssets_019c4274-2c14-7f70-ad39-4d59a4367995" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContractAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_ifrs-full_ContractAssets_019c4274-2c14-7f70-ad39-4d59a4367995" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueContractAssets_019c4274-2c14-7631-9e75-68bb489d4b91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueContractAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughCumulativeCatchupAdjustmentsToRevenueContractAssets_019c4274-2c14-7631-9e75-68bb489d4b91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DecreaseThroughImpairmentContractAssets_019c4274-2c14-798d-8a79-946d0861ee93" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DecreaseThroughImpairmentContractAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_ifrs-full_DecreaseThroughImpairmentContractAssets_019c4274-2c14-798d-8a79-946d0861ee93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractAssets_019c4274-2c14-7fd9-85da-ced02e06a6b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContractAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLossesOnContractAssets_019c4274-2c14-7bcc-8d2f-873fdfb5ae30" xlink:href="viv-20251231.xsd#viv_ProvisionForLossesOnContractAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_viv_ProvisionForLossesOnContractAssets_019c4274-2c14-7bcc-8d2f-873fdfb5ae30" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseByAdditionsReversalOtherProvisions_019c4274-2c14-7216-bb80-c0d1b156e804" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseByAdditionsReversalOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_viv_IncreaseDecreaseByAdditionsReversalOtherProvisions_019c4274-2c14-7216-bb80-c0d1b156e804" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WriteOffOnProvisionForLossesContractAssets_019c4274-2c14-77cd-ac96-76f7df2c556b" xlink:href="viv-20251231.xsd#viv_WriteOffOnProvisionForLossesContractAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_019c4274-2c14-758a-87dd-cd24528e279b" xlink:to="loc_viv_WriteOffOnProvisionForLossesContractAssets_019c4274-2c14-77cd-ac96-76f7df2c556b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLossesOnContractAssets_019c4274-2c14-79d3-98cc-00c6249869c3" xlink:href="viv-20251231.xsd#viv_ProvisionForLossesOnContractAssets"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail4" xlink:type="simple" xlink:href="viv-20251231.xsd#TRADEACCOUNTSRECEIVABLEDetail4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEDetail4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableLineItems_019c4274-2c14-788d-a7ba-f6cde8e8d4a8" xlink:href="viv-20251231.xsd#viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableTable_019c4274-2c14-7a19-af86-fa13b6c09d27" xlink:href="viv-20251231.xsd#viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableLineItems_019c4274-2c14-788d-a7ba-f6cde8e8d4a8" xlink:to="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableTable_019c4274-2c14-7a19-af86-fa13b6c09d27" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2c14-7c9d-8879-9bd456194d64" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableTable_019c4274-2c14-7a19-af86-fa13b6c09d27" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2c14-7c9d-8879-9bd456194d64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2c14-7c9d-8879-9bd456194d64_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2c14-7c9d-8879-9bd456194d64" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2c14-7c9d-8879-9bd456194d64_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2c14-7a2a-8c7c-8715aaf1aa3c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2c14-7c9d-8879-9bd456194d64" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2c14-7a2a-8c7c-8715aaf1aa3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c4274-2c14-75e6-8526-bd9bafe7a0ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2c14-7a2a-8c7c-8715aaf1aa3c" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c4274-2c14-75e6-8526-bd9bafe7a0ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c4845-53d0-7e2c-af8d-f8229f8ea1c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableTable_019c4274-2c14-7a19-af86-fa13b6c09d27" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c4845-53d0-7e2c-af8d-f8229f8ea1c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7e2c-af8d-f8229f8ea1c3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4845-53d0-7e2c-af8d-f8229f8ea1c3" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7e2c-af8d-f8229f8ea1c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7943-80fb-d5a4473baeeb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4845-53d0-7e2c-af8d-f8229f8ea1c3" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7943-80fb-d5a4473baeeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c4845-f1c1-7dfd-a57d-5266a21760a7" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7943-80fb-d5a4473baeeb" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c4845-f1c1-7dfd-a57d-5266a21760a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c4846-d99a-743b-95c9-f52d8c9ab580" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7943-80fb-d5a4473baeeb" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c4846-d99a-743b-95c9-f52d8c9ab580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c4847-2b2c-793e-8988-720a8f366f7b" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4845-53d0-7943-80fb-d5a4473baeeb" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c4847-2b2c-793e-8988-720a8f366f7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfEstimatedImpairmentLossesForAccountsReceivableLineItems_019c4274-2c14-788d-a7ba-f6cde8e8d4a8" xlink:to="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForCreditLossesOnFinancialAssetsAccount_019c4274-2c14-70d7-a057-cb51bf0a8487" xlink:href="viv-20251231.xsd#viv_ProvisionForCreditLossesOnFinancialAssetsAccount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:to="loc_viv_ProvisionForCreditLossesOnFinancialAssetsAccount_019c4274-2c14-70d7-a057-cb51bf0a8487" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseInCreditLossAllowanceRecognisedInProfitOrLoss_019c4274-2c14-7720-9dfe-a08eeafdd27c" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseInCreditLossAllowanceRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:to="loc_viv_IncreaseDecreaseInCreditLossAllowanceRecognisedInProfitOrLoss_019c4274-2c14-7720-9dfe-a08eeafdd27c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WriteOffOfProvisionForCreditLossesOnFinancialInvestors_019c4274-2c14-7fbd-95c2-581c3fab0ef3" xlink:href="viv-20251231.xsd#viv_WriteOffOfProvisionForCreditLossesOnFinancialInvestors"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:to="loc_viv_WriteOffOfProvisionForCreditLossesOnFinancialInvestors_019c4274-2c14-7fbd-95c2-581c3fab0ef3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughBusinessCombinationsAllowanceAccountForCreditLossesOfFinancialAssets_019c4274-2c14-7f2b-8687-b4a6bcec9e73" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughBusinessCombinationsAllowanceAccountForCreditLossesOfFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInAllowanceAccountForCreditLossesOfFinancialAssetsAbstract_019c4274-2c14-749d-b9b5-5c5d36a1ca0e" xlink:to="loc_viv_IncreaseDecreaseThroughBusinessCombinationsAllowanceAccountForCreditLossesOfFinancialAssets_019c4274-2c14-7f2b-8687-b4a6bcec9e73" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForCreditLossesOnFinancialAssetsAccount_019c4274-2c14-7542-b0d4-a406ca5f8c8a" xlink:href="viv-20251231.xsd#viv_ProvisionForCreditLossesOnFinancialAssetsAccount"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEAdditionalinformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#TRADEACCOUNTSRECEIVABLEAdditionalinformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TRADEACCOUNTSRECEIVABLEAdditionalinformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c481d-b49e-76af-8f47-4b81fddc70a1" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4819-4a9f-7724-98ef-00110919dc41" xlink:href="viv-20251231.xsd#viv_DisclosureOfTradeAccountsReceivablesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c481d-b49e-76af-8f47-4b81fddc70a1" xlink:to="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4819-4a9f-7724-98ef-00110919dc41" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesTable_019c4819-4a9f-7724-98ef-00110919dc41" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c481d-b49e-7c27-bbb4-6899f7946f05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c481d-b49e-7ec6-8ff7-4a29a69ee2e1" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c481d-b49e-7c27-bbb4-6899f7946f05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayFIDCsMember_019c481d-b49e-7b68-b7c3-bb7f97cbe599" xlink:href="viv-20251231.xsd#viv_VivoPayFIDCsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c481d-b49e-7c27-bbb4-6899f7946f05" xlink:to="loc_viv_VivoPayFIDCsMember_019c481d-b49e-7b68-b7c3-bb7f97cbe599" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfConsolidatedExpectedCreditLosses_019c481d-b49e-7934-a32e-cbbf388aedc6" xlink:href="viv-20251231.xsd#viv_PercentageOfConsolidatedExpectedCreditLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c481d-b49e-76af-8f47-4b81fddc70a1" xlink:to="loc_viv_PercentageOfConsolidatedExpectedCreditLosses_019c481d-b49e-7934-a32e-cbbf388aedc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentOfTradeAccountReceivables_019c4274-2c14-7f57-821f-9ad4e9333101" xlink:href="viv-20251231.xsd#viv_PercentOfTradeAccountReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTradeAccountsReceivablesLineItems_019c481d-b49e-76af-8f47-4b81fddc70a1" xlink:to="loc_viv_PercentOfTradeAccountReceivables_019c4274-2c14-7f57-821f-9ad4e9333101" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INVENTORIESDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INVENTORIESDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INVENTORIESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfInventoriesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsInventoryCurrentTable_019c7288-f1fe-7452-aedb-c4889fd80a5e" xlink:href="viv-20251231.xsd#viv_IfrsInventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:to="loc_viv_IfrsInventoryCurrentTable_019c7288-f1fe-7452-aedb-c4889fd80a5e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c7289-71d7-7a25-96ed-77866ea4f15b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_IfrsInventoryCurrentTable_019c7288-f1fe-7452-aedb-c4889fd80a5e" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c7289-71d7-7a25-96ed-77866ea4f15b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c7289-71d7-7a25-96ed-77866ea4f15b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c7289-71d7-7a25-96ed-77866ea4f15b" xlink:to="loc_ifrs-full_CarryingAmountMember_019c7289-71d7-7a25-96ed-77866ea4f15b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c7289-e5dd-7efc-a6bf-a007e12161e0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c7289-71d7-7a25-96ed-77866ea4f15b" xlink:to="loc_ifrs-full_CarryingAmountMember_019c7289-e5dd-7efc-a6bf-a007e12161e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c728a-9381-7427-a27a-6d41f5fa034d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c7289-e5dd-7efc-a6bf-a007e12161e0" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c728a-9381-7427-a27a-6d41f5fa034d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedImpairmentMember_019c728a-f9bb-748c-bd94-bf9b5522ae10" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c7289-e5dd-7efc-a6bf-a007e12161e0" xlink:to="loc_ifrs-full_AccumulatedImpairmentMember_019c728a-f9bb-748c-bd94-bf9b5522ae10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Merchandise_019c480a-cc6b-72b4-957c-c17af2189003" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Merchandise"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:to="loc_ifrs-full_Merchandise_019c480a-cc6b-72b4-957c-c17af2189003" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RawMaterials_019c4274-2c14-76f9-9414-f63db88b9a4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RawMaterials"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:to="loc_ifrs-full_RawMaterials_019c4274-2c14-76f9-9414-f63db88b9a4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherInventories_019c4274-2c14-701a-bf03-8a67a9879222" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherInventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:to="loc_ifrs-full_OtherInventories_019c4274-2c14-701a-bf03-8a67a9879222" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Inventories_019c4274-2c14-788a-8c6c-030a9ef7ec0d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Inventories"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfInventoriesAbstract_019c4274-2c14-7a63-a121-5db0f6ff2e82" xlink:to="loc_ifrs-full_Inventories_019c4274-2c14-788a-8c6c-030a9ef7ec0d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PREPAIDEXPENSESDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PREPAIDEXPENSESDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PREPAIDEXPENSESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:href="viv-20251231.xsd#viv_PrepaidExpensesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfPrepaymentsAndAccruedIncomeIncludingContractAssetsTable_019c4274-2c14-723f-a9f2-78c43b9ac9d4" xlink:href="viv-20251231.xsd#viv_DisclosureOfPrepaymentsAndAccruedIncomeIncludingContractAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_DisclosureOfPrepaymentsAndAccruedIncomeIncludingContractAssetsTable_019c4274-2c14-723f-a9f2-78c43b9ac9d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidIncrementalCosts_019c4274-2c14-73a5-b147-1d9607d8af64" xlink:href="viv-20251231.xsd#viv_PrepaidIncrementalCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaidIncrementalCosts_019c4274-2c14-73a5-b147-1d9607d8af64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidSoftwareAndNetworksMaintenance_019c4274-2c14-79d3-8e92-4bade510f0a7" xlink:href="viv-20251231.xsd#viv_PrepaidSoftwareAndNetworksMaintenance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaidSoftwareAndNetworksMaintenance_019c4274-2c14-79d3-8e92-4bade510f0a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidAdvertisingAndPublicity_019c4274-2c14-753f-b73f-74f414c40e38" xlink:href="viv-20251231.xsd#viv_PrepaidAdvertisingAndPublicity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaidAdvertisingAndPublicity_019c4274-2c14-753f-b73f-74f414c40e38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidPersonal_019c4274-2c14-7b9e-8640-c2fe55f64eed" xlink:href="viv-20251231.xsd#viv_PrepaidPersonal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaidPersonal_019c4274-2c14-7b9e-8640-c2fe55f64eed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaidFinancialCharges_019c4274-2c14-7452-82ac-69d8cb6f0248" xlink:href="viv-20251231.xsd#viv_PrepaidFinancialCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaidFinancialCharges_019c4274-2c14-7452-82ac-69d8cb6f0248" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PrepaymentsInsuranceSatellitesAndLinksAndOther_019c4274-2c14-7695-ae48-f0525ff2fd7f" xlink:href="viv-20251231.xsd#viv_PrepaymentsInsuranceSatellitesAndLinksAndOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PrepaymentsInsuranceSatellitesAndLinksAndOther_019c4274-2c14-7695-ae48-f0525ff2fd7f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Prepayments_019c4274-2c14-7b0c-b92b-686c1da69d49" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Prepayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_ifrs-full_Prepayments_019c4274-2c14-7b0c-b92b-686c1da69d49" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPrepayments_019c4274-2c14-7d87-b961-32c6192bd9cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentPrepayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_ifrs-full_CurrentPrepayments_019c4274-2c14-7d87-b961-32c6192bd9cc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentPrepayments_019c4274-2c14-7b77-95f1-96218b8dfd40" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentPrepayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_ifrs-full_NoncurrentPrepayments_019c4274-2c14-7b77-95f1-96218b8dfd40" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PeriodForPayingSalesCommissionsToObtainCustomerContracts_019c4274-2c14-7a67-83b7-45e85ce1dca3" xlink:href="viv-20251231.xsd#viv_PeriodForPayingSalesCommissionsToObtainCustomerContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_PrepaidExpensesLineItems_019c4962-c0d9-791f-9d3c-7b0631245f1d" xlink:to="loc_viv_PeriodForPayingSalesCommissionsToObtainCustomerContracts_019c4274-2c14-7a67-83b7-45e85ce1dca3" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESDeferredtaxesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INCOMEANDSOCIALCONTRIBUTIONTAXESDeferredtaxesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESDeferredtaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-73d9-bfb4-90b0584a0e69" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-73d9-bfb4-90b0584a0e69" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c4274-2c14-730f-8ea6-bc91443d9e09" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-73d9-bfb4-90b0584a0e69" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c4274-2c14-730f-8ea6-bc91443d9e09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-730f-8ea6-bc91443d9e09_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c4274-2c14-730f-8ea6-bc91443d9e09" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-730f-8ea6-bc91443d9e09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_019c4274-2c14-730f-8ea6-bc91443d9e09" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeAndSocialContributionTaxesOnTaxLossesMember_019c4274-2c14-7c78-b9ac-5ed35e37fff2" xlink:href="viv-20251231.xsd#viv_IncomeAndSocialContributionTaxesOnTaxLossesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_IncomeAndSocialContributionTaxesOnTaxLossesMember_019c4274-2c14-7c78-b9ac-5ed35e37fff2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeAndSocialContributionTaxesOnTemporaryDifferencesMember_019c4274-2c14-747c-9df3-a1e2456887cb" xlink:href="viv-20251231.xsd#viv_IncomeAndSocialContributionTaxesOnTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_IncomeAndSocialContributionTaxesOnTemporaryDifferencesMember_019c4274-2c14-747c-9df3-a1e2456887cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsForLegalLaborTaxCivilAndRegulatoryContingenciesMember_019c4274-2c14-7b97-bddf-e94ce5027e1a" xlink:href="viv-20251231.xsd#viv_ProvisionsForLegalLaborTaxCivilAndRegulatoryContingenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_ProvisionsForLegalLaborTaxCivilAndRegulatoryContingenciesMember_019c4274-2c14-7b97-bddf-e94ce5027e1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeAccountsPayableAndOtherProvisionsMember_019c4274-2c14-76b5-b3e7-60a997d77e31" xlink:href="viv-20251231.xsd#viv_TradeAccountsPayableAndOtherProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_TradeAccountsPayableAndOtherProvisionsMember_019c4274-2c14-76b5-b3e7-60a997d77e31" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CustomerPortfolioAndTrademarksMember_019c4274-2c14-7cd6-b7f4-61c7ff7cf47b" xlink:href="viv-20251231.xsd#viv_CustomerPortfolioAndTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_CustomerPortfolioAndTrademarksMember_019c4274-2c14-7cd6-b7f4-61c7ff7cf47b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedLossesOnImpairmentOfAccountsReceivableMember_019c4274-2c14-70c3-81cd-a6be980d7217" xlink:href="viv-20251231.xsd#viv_EstimatedLossesOnImpairmentOfAccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_EstimatedLossesOnImpairmentOfAccountsReceivableMember_019c4274-2c14-70c3-81cd-a6be980d7217" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedLossesFromModemsAndOtherPEItemsMember_019c4274-2c14-7017-8b71-76ea781da313" xlink:href="viv-20251231.xsd#viv_EstimatedLossesFromModemsAndOtherPEItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_EstimatedLossesFromModemsAndOtherPEItemsMember_019c4274-2c14-7017-8b71-76ea781da313" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PensionPlansAndOtherPostEmploymentBenefitsMember_019c4274-2c14-7220-a3c2-b6bdc8a290b8" xlink:href="viv-20251231.xsd#viv_PensionPlansAndOtherPostEmploymentBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_PensionPlansAndOtherPostEmploymentBenefitsMember_019c4274-2c14-7220-a3c2-b6bdc8a290b8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProfitSharingMember_019c4274-2c14-7bf3-bf24-4ef2df49d6e2" xlink:href="viv-20251231.xsd#viv_ProfitSharingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_ProfitSharingMember_019c4274-2c14-7bf3-bf24-4ef2df49d6e2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LicencesMember_019c4274-2c14-7ae5-a55e-14a9f4e33227" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_ifrs-full_LicencesMember_019c4274-2c14-7ae5-a55e-14a9f4e33227" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EffectsOfGoodwillGeneratedInSpanishENavytreeVivoPartAndGvtpartMember_019c4274-2c14-7f21-979e-dc9c118e57ae" xlink:href="viv-20251231.xsd#viv_EffectsOfGoodwillGeneratedInSpanishENavytreeVivoPartAndGvtpartMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_EffectsOfGoodwillGeneratedInSpanishENavytreeVivoPartAndGvtpartMember_019c4274-2c14-7f21-979e-dc9c118e57ae" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EffectsOfPropertyPlantAndEquipmentOfSmallValueMember_019c4274-2c14-7567-819b-c8dbf6fe0f22" xlink:href="viv-20251231.xsd#viv_EffectsOfPropertyPlantAndEquipmentOfSmallValueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_EffectsOfPropertyPlantAndEquipmentOfSmallValueMember_019c4274-2c14-7567-819b-c8dbf6fe0f22" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TechnologicalInnovationLawMember_019c4274-2c14-747a-bd3b-9f60f4c39e16" xlink:href="viv-20251231.xsd#viv_TechnologicalInnovationLawMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_TechnologicalInnovationLawMember_019c4274-2c14-747a-bd3b-9f60f4c39e16" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeAndSocialContributionTaxesOnOtherTemporaryDifferencesMember_019c4274-2c14-716f-abaf-5068217d2995" xlink:href="viv-20251231.xsd#viv_IncomeAndSocialContributionTaxesOnOtherTemporaryDifferencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsDomain_019c4274-2c14-7ba7-8e80-6490d90ed6c7" xlink:to="loc_viv_IncomeAndSocialContributionTaxesOnOtherTemporaryDifferencesMember_019c4274-2c14-716f-abaf-5068217d2995" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c5745-072c-7779-aa0e-9fac9e2060f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-73d9-bfb4-90b0584a0e69" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c5745-072c-7779-aa0e-9fac9e2060f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c5745-072c-7779-aa0e-9fac9e2060f3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c5745-072c-7779-aa0e-9fac9e2060f3" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c5745-072c-7779-aa0e-9fac9e2060f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c5745-072c-7779-aa0e-9fac9e2060f3" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member_019c5747-13e5-78af-af32-d5578d32730a" xlink:href="viv-20251231.xsd#viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:to="loc_viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member_019c5747-13e5-78af-af32-d5578d32730a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c574c-3a92-73e5-96e2-2f2d2c0cfe8c" xlink:href="viv-20251231.xsd#viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:to="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c574c-3a92-73e5-96e2-2f2d2c0cfe8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember_019c5747-99b2-7696-928a-a376cc5ce782" xlink:href="viv-20251231.xsd#viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:to="loc_viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember_019c5747-99b2-7696-928a-a376cc5ce782" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c574b-bba2-7f26-a8a7-ab5c463ffafd" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c5745-763c-7172-b50e-d5782f5e95cd" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c574b-bba2-7f26-a8a7-ab5c463ffafd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_019c4274-2c14-7b3c-8f5e-9e7ca0679a0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_DeferredTaxLiabilityAsset_019c4274-2c14-7b3c-8f5e-9e7ca0679a0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_019c4274-2c14-76c8-a286-8c810cb7a248" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_019c4274-2c14-76c8-a286-8c810cb7a248" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019c4274-2c14-7e94-b2c8-bc95bc2dc900" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_019c4274-2c14-7e94-b2c8-bc95bc2dc900" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination_019c4274-2c14-714f-8a22-eb4b240fd657" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_AcquisitionrelatedCostsForTransactionRecognisedSeparatelyFromAcquisitionOfAssetsAndAssumptionOfLiabilitiesInBusinessCombination_019c4274-2c14-714f-8a22-eb4b240fd657" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_019c4274-2c14-72a3-abd9-27fa3c71bed5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets_019c4274-2c14-731b-be88-99e47cad7c57" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_DeferredTaxAssets_019c4274-2c14-731b-be88-99e47cad7c57" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilities_019c4274-2c14-7a7b-9d79-40823a7e82e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_DeferredTaxLiabilities_019c4274-2c14-7a7b-9d79-40823a7e82e8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDeferredTaxLiabilities_019c4274-2c14-7bb9-9c3c-955e1929c5ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDeferredTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_ifrs-full_NetDeferredTaxLiabilities_019c4274-2c14-7bb9-9c3c-955e1929c5ed" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredTaxAssetsOfSubsidiaries_019c4274-2c14-7e5f-a8d0-7a00ddee39c7" xlink:href="viv-20251231.xsd#viv_DeferredTaxAssetsOfSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_viv_DeferredTaxAssetsOfSubsidiaries_019c4274-2c14-7e5f-a8d0-7a00ddee39c7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredTaxLiabilitiesWithoutConsideringTheSubsidiarysDeferredTaxAssets_019c4274-2c14-7084-9971-30fb1a281ea2" xlink:href="viv-20251231.xsd#viv_DeferredTaxLiabilitiesWithoutConsideringTheSubsidiarysDeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_viv_DeferredTaxLiabilitiesWithoutConsideringTheSubsidiarysDeferredTaxAssets_019c4274-2c14-7084-9971-30fb1a281ea2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_UnrecognizedDeferredTaxAssetsRelatedToIROnTaxLossesAndCSOnNegativeBasisOnTheAccountingBooks_019c4274-2c14-7224-9e16-2900e1e2fc4a" xlink:href="viv-20251231.xsd#viv_UnrecognizedDeferredTaxAssetsRelatedToIROnTaxLossesAndCSOnNegativeBasisOnTheAccountingBooks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_viv_UnrecognizedDeferredTaxAssetsRelatedToIROnTaxLossesAndCSOnNegativeBasisOnTheAccountingBooks_019c4274-2c14-7224-9e16-2900e1e2fc4a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeductibleTemporaryDifferencesArisingFromTheAcquisitionOfGarliava_019c4274-2c14-7b9a-9fee-10e0fa9dfa51" xlink:href="viv-20251231.xsd#viv_DeductibleTemporaryDifferencesArisingFromTheAcquisitionOfGarliava"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7b51-9dbf-11d364f629c2" xlink:to="loc_viv_DeductibleTemporaryDifferencesArisingFromTheAcquisitionOfGarliava_019c4274-2c14-7b9a-9fee-10e0fa9dfa51" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESProjectionsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INCOMEANDSOCIALCONTRIBUTIONTAXESProjectionsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESProjectionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7ac6-89ee-7fd2c64cf4f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-79b8-8144-6ae4cf05eb93" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7ac6-89ee-7fd2c64cf4f0" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-79b8-8144-6ae4cf05eb93" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2c14-7f30-9ed6-5a81fed38b88" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-79b8-8144-6ae4cf05eb93" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2c14-7f30-9ed6-5a81fed38b88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2c14-7f30-9ed6-5a81fed38b88_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2c14-7f30-9ed6-5a81fed38b88" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2c14-7f30-9ed6-5a81fed38b88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2c14-7f30-9ed6-5a81fed38b88" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2c14-79a3-bbff-5d51696304ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2c14-79a3-bbff-5d51696304ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2c14-7046-a235-fea2f6f15d45" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2c14-7046-a235-fea2f6f15d45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2c14-78b7-9f99-ae5c102d48fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2c14-78b7-9f99-ae5c102d48fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2c14-7f7e-8cab-24eea748f0ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2c14-7f7e-8cab-24eea748f0ab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2c14-7622-91bf-ef3de7470f05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2c14-7622-91bf-ef3de7470f05" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2c14-76c5-9549-e17917f72191" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2c14-7bcf-bebb-2baebf719463" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2c14-76c5-9549-e17917f72191" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_019c4274-2c14-770c-9b5e-c61efeff8283" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-7ac6-89ee-7fd2c64cf4f0" xlink:to="loc_ifrs-full_DeferredTaxLiabilityAsset_019c4274-2c14-770c-9b5e-c61efeff8283" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESUncertaintiesaboutIncomeTaxTreatmentsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INCOMEANDSOCIALCONTRIBUTIONTAXESUncertaintiesaboutIncomeTaxTreatmentsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INCOMEANDSOCIALCONTRIBUTIONTAXESUncertaintiesaboutIncomeTaxTreatmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-7881-a76e-b6f6d2ac1080" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-7881-a76e-b6f6d2ac1080" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c4274-2c14-79c3-b428-e8d98720b226" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_019c4274-2c14-7881-a76e-b6f6d2ac1080" xlink:to="loc_ifrs-full_RangeAxis_019c4274-2c14-79c3-b428-e8d98720b226" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2c14-79c3-b428-e8d98720b226_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2c14-79c3-b428-e8d98720b226" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2c14-79c3-b428-e8d98720b226_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2c14-7ab0-a786-0c32ac2d9460" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2c14-79c3-b428-e8d98720b226" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2c14-7ab0-a786-0c32ac2d9460" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c4274-2c14-7d22-b138-3e92893e4316" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2c14-7ab0-a786-0c32ac2d9460" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c4274-2c14-7d22-b138-3e92893e4316" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c4274-2c14-750c-bbcd-1d36aa03d523" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2c14-7ab0-a786-0c32ac2d9460" xlink:to="loc_ifrs-full_TopOfRangeMember_019c4274-2c14-750c-bbcd-1d36aa03d523" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForTaxLitigation_019c4274-2c14-7987-a462-7a6a1bdcf46e" xlink:href="viv-20251231.xsd#viv_ProvisionForTaxLitigation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_viv_ProvisionForTaxLitigation_019c4274-2c14-7987-a462-7a6a1bdcf46e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxLitigationProbabilityOfAcceptance_019c4274-2c14-79e8-b122-5aba802f620f" xlink:href="viv-20251231.xsd#viv_TaxLitigationProbabilityOfAcceptance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_viv_TaxLitigationProbabilityOfAcceptance_019c4274-2c14-79e8-b122-5aba802f620f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeAndSocialContributionTaxesPayableNonCurrent_019c4274-2c14-758f-8908-0172894e6f7e" xlink:href="viv-20251231.xsd#viv_IncomeAndSocialContributionTaxesPayableNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_viv_IncomeAndSocialContributionTaxesPayableNonCurrent_019c4274-2c14-758f-8908-0172894e6f7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionLiabilities_019c4274-2c14-7c6d-b8da-196176b73e31" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_viv_IncomeTaxAndSocialContributionLiabilities_019c4274-2c14-7c6d-b8da-196176b73e31" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxLitigationAmountForCollectionOfIrpjAndCsllRelatedToAmortizationOfGoodwill_019c4274-2c14-7385-999e-c95e28e6b87b" xlink:href="viv-20251231.xsd#viv_TaxLitigationAmountForCollectionOfIrpjAndCsllRelatedToAmortizationOfGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_019c4274-2c14-75e5-be9f-ef146638dd57" xlink:to="loc_viv_TaxLitigationAmountForCollectionOfIrpjAndCsllRelatedToAmortizationOfGoodwill_019c4274-2c14-7385-999e-c95e28e6b87b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/JUDICIALDEPOSITSANDGARNISHMENTSJudicialDepositsandgarnishmentsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#JUDICIALDEPOSITSANDGARNISHMENTSJudicialDepositsandgarnishmentsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/JUDICIALDEPOSITSANDGARNISHMENTSJudicialDepositsandgarnishmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesTable_019c4274-2cde-7053-af2d-7d9475783c80" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_TypeOfTaxesTable_019c4274-2cde-7053-af2d-7d9475783c80" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialTaxDeposits_019c4274-2cde-7c02-9c6e-cde111ccd2cd" xlink:href="viv-20251231.xsd#viv_JudicialTaxDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_JudicialTaxDeposits_019c4274-2cde-7c02-9c6e-cde111ccd2cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialCivilDeposits_019c4274-2cde-78ff-a546-bebf15ce776f" xlink:href="viv-20251231.xsd#viv_JudicialCivilDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_JudicialCivilDeposits_019c4274-2cde-78ff-a546-bebf15ce776f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialRegulatoryDeposits_019c4274-2cde-76b8-a479-7437a70d2be4" xlink:href="viv-20251231.xsd#viv_JudicialRegulatoryDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_JudicialRegulatoryDeposits_019c4274-2cde-76b8-a479-7437a70d2be4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialLaborDeposits_019c4274-2cde-7e0a-8ecd-fab092b673bc" xlink:href="viv-20251231.xsd#viv_JudicialLaborDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_JudicialLaborDeposits_019c4274-2cde-7e0a-8ecd-fab092b673bc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialDeposits_019c4274-2cde-788f-adb0-28367241fa59" xlink:href="viv-20251231.xsd#viv_JudicialDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_JudicialDeposits_019c4274-2cde-788f-adb0-28367241fa59" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_Garnishments_019c4274-2cde-7828-bbb4-898a635c628f" xlink:href="viv-20251231.xsd#viv_Garnishments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_viv_Garnishments_019c4274-2cde-7828-bbb4-898a635c628f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestrictedCashAndCashEquivalents_019c4274-2cde-7774-b4d1-0f38e332299a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RestrictedCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_ifrs-full_RestrictedCashAndCashEquivalents_019c4274-2cde-7774-b4d1-0f38e332299a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentRestrictedCashAndCashEquivalents_019c4274-2cde-7a08-86bf-ae51e408c15d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentRestrictedCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_ifrs-full_CurrentRestrictedCashAndCashEquivalents_019c4274-2cde-7a08-86bf-ae51e408c15d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentRestrictedCashAndCashEquivalents_019c4274-2cde-769f-8b14-1e13c5c2029e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentRestrictedCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7922-92ae-ae0cdb49ffcc" xlink:to="loc_ifrs-full_NoncurrentRestrictedCashAndCashEquivalents_019c4274-2cde-769f-8b14-1e13c5c2029e" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/JUDICIALDEPOSITSANDGARNISHMENTSTaxrelatedjudicialDepositsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#JUDICIALDEPOSITSANDGARNISHMENTSTaxrelatedjudicialDepositsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/JUDICIALDEPOSITSANDGARNISHMENTSTaxrelatedjudicialDepositsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7d5d-bc08-388518e3690d" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesTable_019c4274-2cde-7069-8b18-2204827820fd" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7d5d-bc08-388518e3690d" xlink:to="loc_viv_TypeOfTaxesTable_019c4274-2cde-7069-8b18-2204827820fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesAxis_019c4274-2cde-7fd2-9ccf-cdb620939ffc" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_TypeOfTaxesTable_019c4274-2cde-7069-8b18-2204827820fd" xlink:to="loc_viv_TypeOfTaxesAxis_019c4274-2cde-7fd2-9ccf-cdb620939ffc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesMember_019c4274-2cde-7fd2-9ccf-cdb620939ffc_default" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypeOfTaxesAxis_019c4274-2cde-7fd2-9ccf-cdb620939ffc" xlink:to="loc_viv_TypeOfTaxesMember_019c4274-2cde-7fd2-9ccf-cdb620939ffc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:href="viv-20251231.xsd#viv_TypeOfTaxesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypeOfTaxesAxis_019c4274-2cde-7fd2-9ccf-cdb620939ffc" xlink:to="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_UniversalTelecommunicationServicesFundFustMember_019c4274-2cde-775a-9666-aad3f114c3b9" xlink:href="viv-20251231.xsd#viv_UniversalTelecommunicationServicesFundFustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_UniversalTelecommunicationServicesFundFustMember_019c4274-2cde-775a-9666-aad3f114c3b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateValueAddedTaxIcmsMember_019c4274-2cde-757e-9141-18076d04f3ba" xlink:href="viv-20251231.xsd#viv_StateValueAddedTaxIcmsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_StateValueAddedTaxIcmsMember_019c4274-2cde-757e-9141-18076d04f3ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SocialContributionTaxForInterventionInEconomicOrderCideMember_019c4274-2cde-7368-9360-af234125cc97" xlink:href="viv-20251231.xsd#viv_SocialContributionTaxForInterventionInEconomicOrderCideMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_SocialContributionTaxForInterventionInEconomicOrderCideMember_019c4274-2cde-7368-9360-af234125cc97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CorporateIncomeTaxIrpjAndSocialContributionTaxCsllMember_019c4274-2cde-7c6a-84e1-966386dc2073" xlink:href="viv-20251231.xsd#viv_CorporateIncomeTaxIrpjAndSocialContributionTaxCsllMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_CorporateIncomeTaxIrpjAndSocialContributionTaxCsllMember_019c4274-2cde-7c6a-84e1-966386dc2073" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelecommunicationsInspectionFundMember_019c4274-2cde-7210-8dc0-29f494992506" xlink:href="viv-20251231.xsd#viv_TelecommunicationsInspectionFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_TelecommunicationsInspectionFundMember_019c4274-2cde-7210-8dc0-29f494992506" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ContributionTaxMember_019c4274-2cde-75e7-b0be-e1914a8c3d19" xlink:href="viv-20251231.xsd#viv_ContributionTaxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_ContributionTaxMember_019c4274-2cde-75e7-b0be-e1914a8c3d19" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WithholdingIncomeTaxIrrfMember_019c4274-2cde-7db7-81a9-3e50e58d651c" xlink:href="viv-20251231.xsd#viv_WithholdingIncomeTaxIrrfMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_WithholdingIncomeTaxIrrfMember_019c4274-2cde-7db7-81a9-3e50e58d651c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SocialSecurityWorkAccidentInsuranceSatAndFundsToThirdPartiesInssMember_019c4274-2cde-7821-be10-37b98926ad4f" xlink:href="viv-20251231.xsd#viv_SocialSecurityWorkAccidentInsuranceSatAndFundsToThirdPartiesInssMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_SocialSecurityWorkAccidentInsuranceSatAndFundsToThirdPartiesInssMember_019c4274-2cde-7821-be10-37b98926ad4f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherTaxesChargesAndContributionsMember_019c4274-2cde-755a-a95b-0e83c460843d" xlink:href="viv-20251231.xsd#viv_OtherTaxesChargesAndContributionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesMember_019c4274-2cde-7737-905e-128d769ec62a" xlink:to="loc_viv_OtherTaxesChargesAndContributionsMember_019c4274-2cde-755a-a95b-0e83c460843d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialTaxDeposits_019c4274-2cde-781b-bc82-18e4af84360f" xlink:href="viv-20251231.xsd#viv_JudicialTaxDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TypeOfTaxesLineItems_019c4274-2cde-7d5d-bc08-388518e3690d" xlink:to="loc_viv_JudicialTaxDeposits_019c4274-2cde-781b-bc82-18e4af84360f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OTHERASSETSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#OTHERASSETSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OTHERASSETSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:href="viv-20251231.xsd#viv_OtherAssetsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherAssetsDisclosureTable_019c4274-2cde-7501-909f-759252009ac4" xlink:href="viv-20251231.xsd#viv_OtherAssetsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_OtherAssetsDisclosureTable_019c4274-2cde-7501-909f-759252009ac4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2cde-7947-aa5c-e614109821c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_OtherAssetsDisclosureTable_019c4274-2cde-7501-909f-759252009ac4" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2cde-7947-aa5c-e614109821c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2cde-7947-aa5c-e614109821c1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2cde-7947-aa5c-e614109821c1" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2cde-7947-aa5c-e614109821c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2cde-790e-920f-38a281283ecf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2cde-7947-aa5c-e614109821c1" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2cde-790e-920f-38a281283ecf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPensionPbsAssistedPlanMember_019c4274-2cde-76f7-a529-e61691e3ace4" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPensionPbsAssistedPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2cde-790e-920f-38a281283ecf" xlink:to="loc_viv_DefinedBenefitPensionPbsAssistedPlanMember_019c4274-2cde-76f7-a529-e61691e3ace4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7e9c-ab49-da08d8e56cb8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_OtherAssetsDisclosureTable_019c4274-2cde-7501-909f-759252009ac4" xlink:to="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7e9c-ab49-da08d8e56cb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7e9c-ab49-da08d8e56cb8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7e9c-ab49-da08d8e56cb8" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7e9c-ab49-da08d8e56cb8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7c25-b96b-78607411f48f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7e9c-ab49-da08d8e56cb8" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7c25-b96b-78607411f48f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesMember_019c4274-2cde-7f6f-8a4e-c71d5ceff53b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7c25-b96b-78607411f48f" xlink:to="loc_ifrs-full_JointVenturesMember_019c4274-2cde-7f6f-8a4e-c71d5ceff53b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7c33-83d2-6e41285951fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_OtherAssetsDisclosureTable_019c4274-2cde-7501-909f-759252009ac4" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7c33-83d2-6e41285951fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7c33-83d2-6e41285951fb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7c33-83d2-6e41285951fb" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7c33-83d2-6e41285951fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-706c-b01e-80c90dcb4fef" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7c33-83d2-6e41285951fb" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-706c-b01e-80c90dcb4fef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointControlOrSignificantInfluenceMember_019c4274-2cde-7abf-b8e9-336cedff85dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointControlOrSignificantInfluenceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-706c-b01e-80c90dcb4fef" xlink:to="loc_ifrs-full_JointControlOrSignificantInfluenceMember_019c4274-2cde-7abf-b8e9-336cedff85dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherReceivablesDueFromRelatedParties_019c4274-2cde-77c3-bc87-d705f3dbbc06" xlink:href="viv-20251231.xsd#viv_OtherReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_OtherReceivablesDueFromRelatedParties_019c4274-2cde-77c3-bc87-d705f3dbbc06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SaleOfRealEstateAndOtherReceivables_019c4274-2cde-789c-8d3a-633b2da061d4" xlink:href="viv-20251231.xsd#viv_SaleOfRealEstateAndOtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_SaleOfRealEstateAndOtherReceivables_019c4274-2cde-789c-8d3a-633b2da061d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AdvancesToEmployeesAndSuppliers_019c4274-2cde-7d11-8e93-c89649f8e41c" xlink:href="viv-20251231.xsd#viv_AdvancesToEmployeesAndSuppliers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_AdvancesToEmployeesAndSuppliers_019c4274-2cde-7d11-8e93-c89649f8e41c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecognisedAssetsDefinedBenefitPlan_019c4274-2cde-7b6a-82be-8b2476854621" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RecognisedAssetsDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_RecognisedAssetsDefinedBenefitPlan_019c4274-2cde-7b6a-82be-8b2476854621" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IndemnificationAssetsRecognisedAsOfAcquisitionDate_019c4274-2cde-7813-a7f4-b1346d25e171" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IndemnificationAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_IndemnificationAssetsRecognisedAsOfAcquisitionDate_019c4274-2cde-7813-a7f4-b1346d25e171" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AssetsHeldForSale_019c4440-8948-7041-b8ab-9d6cfe6a64bb" xlink:href="viv-20251231.xsd#viv_AssetsHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_AssetsHeldForSale_019c4440-8948-7041-b8ab-9d6cfe6a64bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SubscriptionBonus_019c4274-2cde-7b1f-af06-4bbfa380802b" xlink:href="viv-20251231.xsd#viv_SubscriptionBonus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_SubscriptionBonus_019c4274-2cde-7b1f-af06-4bbfa380802b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherReceivables_019c4274-2cde-72b4-9ad4-1bdd39ece3ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_OtherReceivables_019c4274-2cde-72b4-9ad4-1bdd39ece3ae" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherAssets_019c4274-2cde-7a6f-9c7b-8b35df802b3f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_OtherAssets_019c4274-2cde-7a6f-9c7b-8b35df802b3f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentAssets_019c4274-2cde-7e11-8494-4d1090eff6ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_OtherCurrentAssets_019c4274-2cde-7e11-8494-4d1090eff6ba" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherNoncurrentAssets_019c4274-2cde-76a0-8050-21861a04c8ee" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_OtherNoncurrentAssets_019c4274-2cde-76a0-8050-21861a04c8ee" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReceivablesFromCorporateEventsRelatedParties_019c4274-2cde-7280-8079-edae655719d6" xlink:href="viv-20251231.xsd#viv_ReceivablesFromCorporateEventsRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_ReceivablesFromCorporateEventsRelatedParties_019c4274-2cde-7280-8079-edae655719d6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DistributionOfReserves_019c4274-2cde-72bb-bb1b-8ba9ba3b7664" xlink:href="viv-20251231.xsd#viv_DistributionOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_viv_DistributionOfReserves_019c4274-2cde-72bb-bb1b-8ba9ba3b7664" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019c4274-2cde-790a-9bb4-b6131b86010d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnDisposalsOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherAssetsDisclosureLineItems_019c4274-2cde-7f8d-8a12-a115c6362bc3" xlink:to="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019c4274-2cde-790a-9bb4-b6131b86010d" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INVESTMENTSDirectequityinterestsinsubsidiariesandjointlycontrolledcompaniesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INVESTMENTSDirectequityinterestsinsubsidiariesandjointlycontrolledcompaniesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INVESTMENTSDirectequityinterestsinsubsidiariesandjointlycontrolledcompaniesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c4274-2cde-7a27-a5fc-b4fa0c363544" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2cde-7024-bf99-be980803fc30" xlink:href="viv-20251231.xsd#viv_DisclosureOfNatureOfOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c4274-2cde-7a27-a5fc-b4fa0c363544" xlink:to="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2cde-7024-bf99-be980803fc30" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7fc4-89bb-35da1a4b7137" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfNatureOfOperationsTable_019c4274-2cde-7024-bf99-be980803fc30" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7fc4-89bb-35da1a4b7137" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7fc4-89bb-35da1a4b7137_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7fc4-89bb-35da1a4b7137" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7fc4-89bb-35da1a4b7137_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7fc4-89bb-35da1a4b7137" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerraNetworksMember_019c4274-2cde-7d1c-86fb-2b4c98a9fc0c" xlink:href="viv-20251231.xsd#viv_TerraNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_TerraNetworksMember_019c4274-2cde-7d1c-86fb-2b4c98a9fc0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaTransportesELogisticaLtdaMember_019c4274-2cde-7543-807a-61f9c02327a0" xlink:href="viv-20251231.xsd#viv_TelefonicaTransportesELogisticaLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_TelefonicaTransportesELogisticaLtdaMember_019c4274-2cde-7543-807a-61f9c02327a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PopInternetLtdaMember_019c4274-2cde-780b-8065-0b7b2f3364b6" xlink:href="viv-20251231.xsd#viv_PopInternetLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_PopInternetLtdaMember_019c4274-2cde-780b-8065-0b7b2f3364b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoMoneyICreditRightsInvestmentFundMember_019c4274-2cde-7c3c-b6cb-228d9d1d28be" xlink:href="viv-20251231.xsd#viv_VivoMoneyICreditRightsInvestmentFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivoMoneyICreditRightsInvestmentFundMember_019c4274-2cde-7c3c-b6cb-228d9d1d28be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayIIInvestmentFundInCreditRightsMember_019c4867-03e5-7310-b606-30300f957aec" xlink:href="viv-20251231.xsd#viv_VivoPayIIInvestmentFundInCreditRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivoPayIIInvestmentFundInCreditRightsMember_019c4867-03e5-7310-b606-30300f957aec" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoMoneyIIIInvestmentFundInCreditRightsMember_019c4274-2cde-7234-8d27-4d348f47fae4" xlink:href="viv-20251231.xsd#viv_VivoMoneyIIIInvestmentFundInCreditRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivoMoneyIIIInvestmentFundInCreditRightsMember_019c4274-2cde-7234-8d27-4d348f47fae4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayHoldingFinanceiraLtdaVivoPayMember_019c4274-2cde-72b9-a8ad-02d767e99367" xlink:href="viv-20251231.xsd#viv_VivoPayHoldingFinanceiraLtdaVivoPayMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivoPayHoldingFinanceiraLtdaVivoPayMember_019c4274-2cde-72b9-a8ad-02d767e99367" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoVenturesMember_019c4274-2cde-7a1f-88ae-67d043fa8b6c" xlink:href="viv-20251231.xsd#viv_VivoVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivoVenturesMember_019c4274-2cde-7a1f-88ae-67d043fa8b6c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember_019c4274-2cde-796f-9965-d8c67eea84d1" xlink:href="viv-20251231.xsd#viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember_019c4274-2cde-796f-9965-d8c67eea84d1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaIoTBigDataETecnologiaDoBrasilS.A.IoTCoBrasilMember_019c4274-2cde-771d-9b17-43db51dd95e9" xlink:href="viv-20251231.xsd#viv_TelefonicaIoTBigDataETecnologiaDoBrasilS.A.IoTCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_TelefonicaIoTBigDataETecnologiaDoBrasilS.A.IoTCoBrasilMember_019c4274-2cde-771d-9b17-43db51dd95e9" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AliancaAtlanticaHoldingB.V..AliancaMember_019c4274-2cde-70d0-8a56-9f8c1d0d5973" xlink:href="viv-20251231.xsd#viv_AliancaAtlanticaHoldingB.V..AliancaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_AliancaAtlanticaHoldingB.V..AliancaMember_019c4274-2cde-70d0-8a56-9f8c1d0d5973" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaAIXDeParticipacoesAIXMember_019c4274-2cde-7843-816d-97bc60b81a65" xlink:href="viv-20251231.xsd#viv_CompanhiaAIXDeParticipacoesAIXMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_CompanhiaAIXDeParticipacoesAIXMember_019c4274-2cde-7843-816d-97bc60b81a65" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaACTDeParticipacoesACTMember_019c4274-2cde-79df-a009-eb71b0bd4307" xlink:href="viv-20251231.xsd#viv_CompanhiaACTDeParticipacoesACTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_CompanhiaACTDeParticipacoesACTMember_019c4274-2cde-79df-a009-eb71b0bd4307" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivaEEducacaoDigitalS.A.VIVAEMember_019c4274-2cde-7610-8d38-664757df726b" xlink:href="viv-20251231.xsd#viv_VivaEEducacaoDigitalS.A.VIVAEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_VivaEEducacaoDigitalS.A.VIVAEMember_019c4274-2cde-7610-8d38-664757df726b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GUDComercializadoraDeEnergiaS.A.GUDMember_019c4274-2cde-795e-84c8-46c45e8450e3" xlink:href="viv-20251231.xsd#viv_GUDComercializadoraDeEnergiaS.A.GUDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_GUDComercializadoraDeEnergiaS.A.GUDMember_019c4274-2cde-795e-84c8-46c45e8450e3" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember_019c4274-2cde-7fd4-a8ef-3248cf6e2678" xlink:href="viv-20251231.xsd#viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7108-8507-c1cb61b4aaf3" xlink:to="loc_viv_FiBrasilInfraestruturaEFibraOticaS.A.FiBrasilMember_019c4274-2cde-7fd4-a8ef-3248cf6e2678" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c4274-2cde-7567-94ab-2c8462996efe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSignificantInvestmentsInSubsidiariesLineItems_019c4274-2cde-7a27-a5fc-b4fa0c363544" xlink:to="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_019c4274-2cde-7567-94ab-2c8462996efe" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INVESTMENTSDisclosureofjointventuresDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INVESTMENTSDisclosureofjointventuresDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INVESTMENTSDisclosureofjointventuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfJointVenturesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7546-bdca-62dc4b81ebd1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfJointVenturesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7546-bdca-62dc4b81ebd1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7aba-b5cf-3e279c93ff80" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7546-bdca-62dc4b81ebd1" xlink:to="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7aba-b5cf-3e279c93ff80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7aba-b5cf-3e279c93ff80_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7aba-b5cf-3e279c93ff80" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7aba-b5cf-3e279c93ff80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7aba-b5cf-3e279c93ff80" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AliancaAtlanticaHoldingB.v.Member_019c4274-2cde-7ba6-b167-982ce1d969b5" xlink:href="viv-20251231.xsd#viv_AliancaAtlanticaHoldingB.v.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_AliancaAtlanticaHoldingB.v.Member_019c4274-2cde-7ba6-b167-982ce1d969b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaAIXDeParticipacoesAIXMember_019c4274-2cde-7a2d-941d-bf20bd554bd1" xlink:href="viv-20251231.xsd#viv_CompanhiaAIXDeParticipacoesAIXMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_CompanhiaAIXDeParticipacoesAIXMember_019c4274-2cde-7a2d-941d-bf20bd554bd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaACTDeParticipacoesACTMember_019c4274-2cde-7924-9476-9129c09ad3f2" xlink:href="viv-20251231.xsd#viv_CompanhiaACTDeParticipacoesACTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_CompanhiaACTDeParticipacoesACTMember_019c4274-2cde-7924-9476-9129c09ad3f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GUDComercializadoraDeEnergiaS.A.GUDMember_019c4274-2cde-73a7-8aaa-b8ed3d91c440" xlink:href="viv-20251231.xsd#viv_GUDComercializadoraDeEnergiaS.A.GUDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_GUDComercializadoraDeEnergiaS.A.GUDMember_019c4274-2cde-73a7-8aaa-b8ed3d91c440" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivaEEducacaoDigitalS.A.VIVAEMember_019c4274-2cde-75e2-973e-ad83277a1114" xlink:href="viv-20251231.xsd#viv_VivaEEducacaoDigitalS.A.VIVAEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_VivaEEducacaoDigitalS.A.VIVAEMember_019c4274-2cde-75e2-973e-ad83277a1114" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4274-2cde-7b35-ac18-7c59bb565144" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-76c3-a3ba-3b1f51baa844" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4274-2cde-7b35-ac18-7c59bb565144" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Assets_019c4274-2cde-77a0-bce3-6f1ff61d7796" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_Assets_019c4274-2cde-77a0-bce3-6f1ff61d7796" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Liabilities_019c4274-2cde-704b-944b-cbd9c9027e26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_Liabilities_019c4274-2cde-704b-944b-cbd9c9027e26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParent_019c4274-2cde-750e-9909-0868ad14e184" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParent_019c4274-2cde-750e-9909-0868ad14e184" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2cde-7aac-8616-ca6d95d25e04" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromRenderingOfTelecommunicationServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2cde-7aac-8616-ca6d95d25e04" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_019c4274-2cde-7bf0-ae03-311ef30c0479" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-782f-91f8-860c0bea8350" xlink:to="loc_ifrs-full_ProfitLoss_019c4274-2cde-7bf0-ae03-311ef30c0479" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/INVESTMENTSDisclosureofchangesininvestmentsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#INVESTMENTSDisclosureofchangesininvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/INVESTMENTSDisclosureofchangesininvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfJointVenturesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7c35-a40f-730249542df1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfJointVenturesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7c35-a40f-730249542df1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7c35-a40f-730249542df1" xlink:to="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7f2b-b0e9-6fb697ffbd28" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cde-7fc7-a2b7-7977a3c7dbb3" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7f2b-b0e9-6fb697ffbd28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesMember_019c4274-2cde-7b7a-8c50-9261ce949c38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cde-7f2b-b0e9-6fb697ffbd28" xlink:to="loc_ifrs-full_JointVenturesMember_019c4274-2cde-7b7a-8c50-9261ce949c38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7857-be24-ddcaa5f48432" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesTable_019c4274-2cde-7c35-a40f-730249542df1" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7857-be24-ddcaa5f48432" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7857-be24-ddcaa5f48432_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7857-be24-ddcaa5f48432" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7857-be24-ddcaa5f48432_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7d49-8363-adb48af131c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4274-2cde-7857-be24-ddcaa5f48432" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7d49-8363-adb48af131c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointControlOrSignificantInfluenceMember_019c4274-2cde-79b2-ab30-38780aafc5cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointControlOrSignificantInfluenceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7d49-8363-adb48af131c2" xlink:to="loc_ifrs-full_JointControlOrSignificantInfluenceMember_019c4274-2cde-79b2-ab30-38780aafc5cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationMember_019c4877-86ad-7842-8b28-443e2b74a3da" xlink:href="viv-20251231.xsd#viv_BusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7d49-8363-adb48af131c2" xlink:to="loc_viv_BusinessCombinationMember_019c4877-86ad-7842-8b28-443e2b74a3da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsOtherInvestmentsMember_019c4274-2cde-7de7-b738-3ae4e16bc84e" xlink:href="viv-20251231.xsd#viv_IfrsOtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4274-2cde-7d49-8363-adb48af131c2" xlink:to="loc_viv_IfrsOtherInvestmentsMember_019c4274-2cde-7de7-b738-3ae4e16bc84e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InvestmentAccountedForUsingEquityMethod_019c4274-2cde-719c-9e0b-f0196581e5e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InvestmentAccountedForUsingEquityMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_ifrs-full_InvestmentAccountedForUsingEquityMethod_019c4274-2cde-719c-9e0b-f0196581e5e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_019c4274-2cde-788b-a22e-ac1442ebcbeb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_ifrs-full_ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod_019c4274-2cde-788b-a22e-ac1442ebcbeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalContributionCashAndCashEquivalents_019c4274-2cde-7fa5-af81-02aabca9a1fa" xlink:href="viv-20251231.xsd#viv_CapitalContributionCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_CapitalContributionCashAndCashEquivalents_019c4274-2cde-7fa5-af81-02aabca9a1fa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_019c4274-2cde-762d-96a5-927c3c102c28" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_019c4274-2cde-762d-96a5-927c3c102c28" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherComprehensiveIncomeRelatingToChangeInInvestments_019c4274-2cde-7698-b9c2-773506e237b2" xlink:href="viv-20251231.xsd#viv_OtherComprehensiveIncomeRelatingToChangeInInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_OtherComprehensiveIncomeRelatingToChangeInInvestments_019c4274-2cde-7698-b9c2-773506e237b2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InvestmentsEquityTransactions_019c4274-2cde-7bb3-bbb3-4da05cfb6901" xlink:href="viv-20251231.xsd#viv_InvestmentsEquityTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_InvestmentsEquityTransactions_019c4274-2cde-7bb3-bbb3-4da05cfb6901" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InvestmentsInSubsidiariesJointVenturesAndAssociatesReportedInFinancialStatements_019c48a8-8cf7-7400-a762-4b5f522cfe0b" xlink:href="viv-20251231.xsd#viv_InvestmentsInSubsidiariesJointVenturesAndAssociatesReportedInFinancialStatements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_InvestmentsInSubsidiariesJointVenturesAndAssociatesReportedInFinancialStatements_019c48a8-8cf7-7400-a762-4b5f522cfe0b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GainLossOnTheRemeasurementOfEquityInterest_019c48ab-83ff-75d7-9dc7-1b50c2825fb0" xlink:href="viv-20251231.xsd#viv_GainLossOnTheRemeasurementOfEquityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_GainLossOnTheRemeasurementOfEquityInterest_019c48ab-83ff-75d7-9dc7-1b50c2825fb0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ControllingInterestInAcquireeRecognised_019c48a4-f357-7f76-8893-e023a7740530" xlink:href="viv-20251231.xsd#viv_ControllingInterestInAcquireeRecognised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_ControllingInterestInAcquireeRecognised_019c48a4-f357-7f76-8893-e023a7740530" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019c48a5-263b-7e16-b924-d8ec84dcc5ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnDisposalsOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_ifrs-full_GainsLossesOnDisposalsOfInvestments_019c48a5-263b-7e16-b924-d8ec84dcc5ae" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalTransactionOnChangesInInvestments_019c4274-2cde-79e7-aa1b-3a4e5b8d7d9a" xlink:href="viv-20251231.xsd#viv_CapitalTransactionOnChangesInInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfJointVenturesLineItems_019c4274-2cde-79d0-914a-3df640408c53" xlink:to="loc_viv_CapitalTransactionOnChangesInInvestments_019c4274-2cde-79e7-aa1b-3a4e5b8d7d9a" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PropertyPlantAndEquipmentDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#PropertyPlantAndEquipmentDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PropertyPlantAndEquipmentDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4792-1ae1-760a-99bf-0e356c39a30e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4792-1ae1-760a-99bf-0e356c39a30e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4792-fa16-71c9-bf06-ab70626c3c91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4792-1ae1-760a-99bf-0e356c39a30e" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4792-fa16-71c9-bf06-ab70626c3c91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-71c9-bf06-ab70626c3c91_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4792-fa16-71c9-bf06-ab70626c3c91" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-71c9-bf06-ab70626c3c91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4792-fa16-71c9-bf06-ab70626c3c91" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentMember_019c4792-fa16-7390-b209-a70f57f8ad18" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentMember_019c4792-fa16-7390-b209-a70f57f8ad18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InfrastructureMember_019c4792-fa16-7a3f-9247-84b933fd8d3c" xlink:href="viv-20251231.xsd#viv_InfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_viv_InfrastructureMember_019c4792-fa16-7a3f-9247-84b933fd8d3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LendingEquipmentMember_019c4792-fa16-7e6f-a9a6-8faaa2d13008" xlink:href="viv-20251231.xsd#viv_LendingEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_viv_LendingEquipmentMember_019c4792-fa16-7e6f-a9a6-8faaa2d13008" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerminalEquipmentMember_019c4792-fa16-7d2c-970d-d3bcd87cb300" xlink:href="viv-20251231.xsd#viv_TerminalEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_viv_TerminalEquipmentMember_019c4792-fa16-7d2c-970d-d3bcd87cb300" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LandMember_019c4792-fa16-7577-854e-c0a319540de1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_ifrs-full_LandMember_019c4792-fa16-7577-854e-c0a319540de1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c4792-fa16-7f47-9d7e-b0acd925e0cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c4792-fa16-7f47-9d7e-b0acd925e0cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConstructionInProgressMember_019c4792-fa16-7446-b721-a14f9639a8e0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4792-fa16-7fe2-8002-1d2802221935" xlink:to="loc_ifrs-full_ConstructionInProgressMember_019c4792-fa16-7446-b721-a14f9639a8e0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c4792-fa16-7ae3-8399-99ea5a155a7a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4792-1ae1-760a-99bf-0e356c39a30e" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c4792-fa16-7ae3-8399-99ea5a155a7a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7ae3-8399-99ea5a155a7a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4792-fa16-7ae3-8399-99ea5a155a7a" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7ae3-8399-99ea5a155a7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4792-fa16-7ae3-8399-99ea5a155a7a" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4792-fa16-7716-acd7-ac35ae1bb86c" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4792-fa16-7716-acd7-ac35ae1bb86c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4792-fa16-78d5-b0f0-7ea75b164a11" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4792-fa16-78d5-b0f0-7ea75b164a11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c479f-bd9c-7c24-8cce-d0bdeac6e465" xlink:href="viv-20251231.xsd#viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:to="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c479f-bd9c-7c24-8cce-d0bdeac6e465" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c47c9-d3fa-7ba5-ada2-64fb313c87cf" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4792-fa16-7c2f-bf15-e5d67e12490c" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c47c9-d3fa-7ba5-ada2-64fb313c87cf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4792-fa16-79a5-b26c-0c3be85c598b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4792-1ae1-760a-99bf-0e356c39a30e" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4792-fa16-79a5-b26c-0c3be85c598b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-79a5-b26c-0c3be85c598b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4792-fa16-79a5-b26c-0c3be85c598b" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-79a5-b26c-0c3be85c598b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-73f4-946c-9923fe0b4fa0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4792-fa16-79a5-b26c-0c3be85c598b" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-73f4-946c-9923fe0b4fa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c4792-fa16-729b-88b1-a1cc82b855f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-73f4-946c-9923fe0b4fa0" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c4792-fa16-729b-88b1-a1cc82b855f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4792-fa16-75c9-a2cd-774b46f270bb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4792-fa16-73f4-946c-9923fe0b4fa0" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4792-fa16-75c9-a2cd-774b46f270bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c4792-fa16-7199-a9b6-2621d6dedcd1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_019c4792-fa16-7199-a9b6-2621d6dedcd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c4792-fa16-74e9-89e4-593b5db425ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c4792-fa16-74e9-89e4-593b5db425ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment_019c4792-fa16-7fc8-9ea0-6223060254eb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment_019c4792-fa16-7fc8-9ea0-6223060254eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c4792-fa16-748c-a303-098b3307ccb2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c4792-fa16-748c-a303-098b3307ccb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c4792-fa16-7383-b5ea-db3edc5b8942" xlink:href="viv-20251231.xsd#viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c4792-fa16-7383-b5ea-db3edc5b8942" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c4792-fa16-7b57-b4c2-e25a650ec398" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c4792-fa16-7b57-b4c2-e25a650ec398" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c4792-fa16-7994-b2a4-bbd6b463bfa3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c4792-fa16-7994-b2a4-bbd6b463bfa3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AssetsHeldForSalePropertyPlantAndEquipment_019c4796-9896-7194-83d4-5893446f2122" xlink:href="viv-20251231.xsd#viv_AssetsHeldForSalePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4792-fa16-7e53-9bd1-7447fe22b78f" xlink:to="loc_viv_AssetsHeldForSalePropertyPlantAndEquipment_019c4796-9896-7194-83d4-5893446f2122" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c4794-5bba-7ee8-ac7d-188ee60efb43" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#PropertyplantandequipmentDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a3-6f86-75df-bf18-e182d92db82c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a2-fb15-76c5-922a-899b1039f36f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a3-6f86-75df-bf18-e182d92db82c" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a2-fb15-76c5-922a-899b1039f36f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a3-6f86-7531-a82d-a5978ee5534d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a2-fb15-76c5-922a-899b1039f36f" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a3-6f86-7531-a82d-a5978ee5534d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7531-a82d-a5978ee5534d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a3-6f86-7531-a82d-a5978ee5534d" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7531-a82d-a5978ee5534d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a3-6f86-7531-a82d-a5978ee5534d" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentAndMediaMember_019c47a3-6f86-7d5a-b15b-afcbba3224bf" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentAndMediaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentAndMediaMember_019c47a3-6f86-7d5a-b15b-afcbba3224bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InfrastructureMember_019c47a3-6f86-7f47-ae8b-ddaa96c8637e" xlink:href="viv-20251231.xsd#viv_InfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:to="loc_viv_InfrastructureMember_019c47a3-6f86-7f47-ae8b-ddaa96c8637e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LendingEquipmentMember_019c47a3-6f86-70c2-9db4-9df606281598" xlink:href="viv-20251231.xsd#viv_LendingEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:to="loc_viv_LendingEquipmentMember_019c47a3-6f86-70c2-9db4-9df606281598" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerminalEquipmentMember_019c47a3-6f86-789d-a819-cfe6eaa03509" xlink:href="viv-20251231.xsd#viv_TerminalEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:to="loc_viv_TerminalEquipmentMember_019c47a3-6f86-789d-a819-cfe6eaa03509" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherPropertyPlantAndEquipmentAssetsMember_019c47a3-6f86-7cb7-a33d-da504a9d9fee" xlink:href="viv-20251231.xsd#viv_OtherPropertyPlantAndEquipmentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a3-6f86-7894-8f4c-70fa35bfaa1e" xlink:to="loc_viv_OtherPropertyPlantAndEquipmentAssetsMember_019c47a3-6f86-7cb7-a33d-da504a9d9fee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c47a3-6f86-71aa-bc91-6133fb1fa822" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a2-fb15-76c5-922a-899b1039f36f" xlink:to="loc_ifrs-full_RangeAxis_019c47a3-6f86-71aa-bc91-6133fb1fa822" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c47a3-6f86-71aa-bc91-6133fb1fa822_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c47a3-6f86-71aa-bc91-6133fb1fa822" xlink:to="loc_ifrs-full_RangeDomain_019c47a3-6f86-71aa-bc91-6133fb1fa822_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c47a3-6f86-784a-8165-4c0374d95832" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c47a3-6f86-71aa-bc91-6133fb1fa822" xlink:to="loc_ifrs-full_RangeDomain_019c47a3-6f86-784a-8165-4c0374d95832" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c47a3-6f86-716a-aee6-0bea9235ea0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c47a3-6f86-784a-8165-4c0374d95832" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c47a3-6f86-716a-aee6-0bea9235ea0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c47a3-6f86-7ec1-ad34-6fdd4bd88519" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c47a3-6f86-784a-8165-4c0374d95832" xlink:to="loc_ifrs-full_TopOfRangeMember_019c47a3-6f86-7ec1-ad34-6fdd4bd88519" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c47a3-6f86-7208-98a1-4538d6dd5eeb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRatePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a3-6f86-75df-bf18-e182d92db82c" xlink:to="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c47a3-6f86-7208-98a1-4538d6dd5eeb" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#PropertyplantandequipmentDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c47a5-5441-789e-a735-447fa1f15417" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:to="loc_srt_StatementScenarioAxis_019c47a5-5441-789e-a735-447fa1f15417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c47a5-5441-789e-a735-447fa1f15417_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c47a5-5441-789e-a735-447fa1f15417" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c47a5-5441-789e-a735-447fa1f15417_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c47a5-5441-7434-be0d-271043e5b672" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c47a5-5441-789e-a735-447fa1f15417" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c47a5-5441-7434-be0d-271043e5b672" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c47a5-5441-70f8-8e15-5f27b838cdea" xlink:href="viv-20251231.xsd#viv_ChangesInLeasesAfterAdoptionOfIFRS16Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c47a5-5441-7434-be0d-271043e5b672" xlink:to="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c47a5-5441-70f8-8e15-5f27b838cdea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c47a7-bba1-7c6f-a976-ff885bef153c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c47a7-bba1-7c6f-a976-ff885bef153c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-bba1-7c6f-a976-ff885bef153c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c47a7-bba1-7c6f-a976-ff885bef153c" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-bba1-7c6f-a976-ff885bef153c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-db52-7d7c-9337-d7abce5c2093" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c47a7-bba1-7c6f-a976-ff885bef153c" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-db52-7d7c-9337-d7abce5c2093" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c47a8-6029-70f8-bbba-a9aa107e2555" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-db52-7d7c-9337-d7abce5c2093" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c47a8-6029-70f8-bbba-a9aa107e2555" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c47a8-e3ee-7713-8820-fc84018750dc" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c47a7-db52-7d7c-9337-d7abce5c2093" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c47a8-e3ee-7713-8820-fc84018750dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a5-5441-72f5-a961-691d5d19d2f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a5-5441-72f5-a961-691d5d19d2f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-72f5-a961-691d5d19d2f8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a5-5441-72f5-a961-691d5d19d2f8" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-72f5-a961-691d5d19d2f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-7274-8dc4-88db31488e4e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47a5-5441-72f5-a961-691d5d19d2f8" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-7274-8dc4-88db31488e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InfrastructureMember_019c47a5-5441-7d5b-819a-62fe0ecffdf2" xlink:href="viv-20251231.xsd#viv_InfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-7274-8dc4-88db31488e4e" xlink:to="loc_viv_InfrastructureMember_019c47a5-5441-7d5b-819a-62fe0ecffdf2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentMember_019c47a5-5441-70dd-a1c7-9bd0ebec7a7a" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-7274-8dc4-88db31488e4e" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentMember_019c47a5-5441-70dd-a1c7-9bd0ebec7a7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c47a5-5441-7e11-8327-f37c3f32d5a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47a5-5441-7274-8dc4-88db31488e4e" xlink:to="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c47a5-5441-7e11-8327-f37c3f32d5a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c47a5-5441-7f31-a638-27d9767d655e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47a4-f3bc-75d2-a3a8-7ce1502a186a" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c47a5-5441-7f31-a638-27d9767d655e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7f31-a638-27d9767d655e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c47a5-5441-7f31-a638-27d9767d655e" xlink:to="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7f31-a638-27d9767d655e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7c84-ae20-0060f404d145" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c47a5-5441-7f31-a638-27d9767d655e" xlink:to="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7c84-ae20-0060f404d145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c47a5-5441-784e-8cbc-fadfa80a37a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7c84-ae20-0060f404d145" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c47a5-5441-784e-8cbc-fadfa80a37a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c47a5-5441-73cc-aa1a-5c8dee35c651" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c47a5-5441-7c84-ae20-0060f404d145" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c47a5-5441-73cc-aa1a-5c8dee35c651" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c47a5-5441-7f2a-b886-e254ead65b9d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_019c47a5-5441-7f2a-b886-e254ead65b9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c47a5-5441-7d49-97a1-98ceb136c56b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c47a5-5441-7d49-97a1-98ceb136c56b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c47a5-5441-7587-aa84-766d56d8dd80" xlink:href="viv-20251231.xsd#viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c47a5-5441-7587-aa84-766d56d8dd80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DepreciationOnLease_019c7204-d286-7b70-b830-a189d4bda3a8" xlink:href="viv-20251231.xsd#viv_DepreciationOnLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_viv_DepreciationOnLease_019c7204-d286-7b70-b830-a189d4bda3a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DepreciationAndWriteOffsNetIFRS16PropertyPlantAndEquipment_019c47a5-5441-7da5-b106-a61db17ab1c4" xlink:href="viv-20251231.xsd#viv_DepreciationAndWriteOffsNetIFRS16PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_viv_DepreciationAndWriteOffsNetIFRS16PropertyPlantAndEquipment_019c47a5-5441-7da5-b106-a61db17ab1c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseThroughCancellationOfContractsPropertyPlantAndEquipment_019c47a5-5441-7f75-8ab4-4b3fdc3c2bf7" xlink:href="viv-20251231.xsd#viv_DecreaseThroughCancellationOfContractsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_viv_DecreaseThroughCancellationOfContractsPropertyPlantAndEquipment_019c47a5-5441-7f75-8ab4-4b3fdc3c2bf7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherChangesInLeases_019c47a5-5441-7797-8f0e-5c6925e773bd" xlink:href="viv-20251231.xsd#viv_OtherChangesInLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_viv_OtherChangesInLeases_019c47a5-5441-7797-8f0e-5c6925e773bd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c47aa-66c5-7075-911a-65f1b1c01eea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47a5-5441-797e-9d97-69d36e1ecabd" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c47aa-66c5-7075-911a-65f1b1c01eea" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c47a6-7b0a-7595-9910-555936e1161c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails4" xlink:type="simple" xlink:href="viv-20251231.xsd#PropertyplantandequipmentDetails4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PropertyplantandequipmentDetails4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47b0-3517-73f3-bc97-38cb4148f83d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47af-8f49-7b56-927b-c4bcb5ce3c19" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47b0-3517-73f3-bc97-38cb4148f83d" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47af-8f49-7b56-927b-c4bcb5ce3c19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c47b0-3517-7a8c-a979-620562896ffe" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47af-8f49-7b56-927b-c4bcb5ce3c19" xlink:to="loc_srt_StatementScenarioAxis_019c47b0-3517-7a8c-a979-620562896ffe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c47b0-3517-7a8c-a979-620562896ffe_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c47b0-3517-7a8c-a979-620562896ffe" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c47b0-3517-7a8c-a979-620562896ffe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c47b0-3517-79ce-81c8-16b0ce48461a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c47b0-3517-7a8c-a979-620562896ffe" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c47b0-3517-79ce-81c8-16b0ce48461a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c47b0-3517-76c9-a6bb-b7c071e61248" xlink:href="viv-20251231.xsd#viv_ChangesInLeasesAfterAdoptionOfIFRS16Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c47b0-3517-79ce-81c8-16b0ce48461a" xlink:to="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c47b0-3517-76c9-a6bb-b7c071e61248" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47b0-3517-7318-b484-4a11b291f7d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47af-8f49-7b56-927b-c4bcb5ce3c19" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47b0-3517-7318-b484-4a11b291f7d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7318-b484-4a11b291f7d4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47b0-3517-7318-b484-4a11b291f7d4" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7318-b484-4a11b291f7d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7eea-bf45-cb6d2feef281" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c47b0-3517-7318-b484-4a11b291f7d4" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7eea-bf45-cb6d2feef281" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InfrastructureMember_019c47b0-3517-7993-8c5a-70609d665b91" xlink:href="viv-20251231.xsd#viv_InfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7eea-bf45-cb6d2feef281" xlink:to="loc_viv_InfrastructureMember_019c47b0-3517-7993-8c5a-70609d665b91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentMember_019c47b0-3517-7b88-b906-6a2ccbaec98d" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7eea-bf45-cb6d2feef281" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentMember_019c47b0-3517-7b88-b906-6a2ccbaec98d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c47b0-3517-73d2-81e4-f666691d688b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c47b0-3517-7eea-bf45-cb6d2feef281" xlink:to="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c47b0-3517-73d2-81e4-f666691d688b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c47b0-3517-7ecd-a0b5-95c191925414" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c47af-8f49-7b56-927b-c4bcb5ce3c19" xlink:to="loc_ifrs-full_RangeAxis_019c47b0-3517-7ecd-a0b5-95c191925414" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c47b0-3517-7ecd-a0b5-95c191925414_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c47b0-3517-7ecd-a0b5-95c191925414" xlink:to="loc_ifrs-full_RangeDomain_019c47b0-3517-7ecd-a0b5-95c191925414_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c47b0-3517-7683-a6e1-20670f88dd7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c47b0-3517-7ecd-a0b5-95c191925414" xlink:to="loc_ifrs-full_RangeDomain_019c47b0-3517-7683-a6e1-20670f88dd7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c47b0-3517-7222-bb24-03991c63b036" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c47b0-3517-7683-a6e1-20670f88dd7c" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c47b0-3517-7222-bb24-03991c63b036" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c47b0-3517-72ef-90ed-6c37122cabef" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c47b0-3517-7683-a6e1-20670f88dd7c" xlink:to="loc_ifrs-full_TopOfRangeMember_019c47b0-3517-72ef-90ed-6c37122cabef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c47b0-3517-7f9d-9fc6-61ace315b2a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRatePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c47b0-3517-73f3-bc97-38cb4148f83d" xlink:to="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c47b0-3517-7f9d-9fc6-61ace315b2a3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PropertyplantandequipmentAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PropertyplantandequipmentAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PropertyplantandequipmentAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4274-2cde-76b7-9705-4b80ede0410c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4274-2cde-76b7-9705-4b80ede0410c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-76b7-9705-4b80ede0410c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4274-2cde-76b7-9705-4b80ede0410c" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-76b7-9705-4b80ede0410c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_019c4274-2cde-76b7-9705-4b80ede0410c" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentMember_019c4274-2cde-7e0f-91b5-7fb3737e1dbd" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentMember_019c4274-2cde-7e0f-91b5-7fb3737e1dbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InfrastructureMember_019c4274-2cde-73ce-b0fd-dfc2390b01c6" xlink:href="viv-20251231.xsd#viv_InfrastructureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_InfrastructureMember_019c4274-2cde-73ce-b0fd-dfc2390b01c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LendingEquipmentMember_019c4274-2cde-7b38-9cd7-2792444d4d10" xlink:href="viv-20251231.xsd#viv_LendingEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_LendingEquipmentMember_019c4274-2cde-7b38-9cd7-2792444d4d10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerminalEquipmentMember_019c4274-2cde-7e6d-87ba-5562157e25ea" xlink:href="viv-20251231.xsd#viv_TerminalEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_TerminalEquipmentMember_019c4274-2cde-7e6d-87ba-5562157e25ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LandMember_019c4274-2cde-758e-8f4d-38f2732c0837" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_ifrs-full_LandMember_019c4274-2cde-758e-8f4d-38f2732c0837" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c4274-2cde-71de-9a81-9984bccbce20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherPropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_ifrs-full_OtherPropertyPlantAndEquipmentMember_019c4274-2cde-71de-9a81-9984bccbce20" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConstructionInProgressMember_019c4274-2cde-7e2b-a85d-b196523145e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_ifrs-full_ConstructionInProgressMember_019c4274-2cde-7e2b-a85d-b196523145e8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwitchingAndTransmissionEquipmentAndMediaMember_019c4274-2cde-74fc-b196-bd7d7765f57a" xlink:href="viv-20251231.xsd#viv_SwitchingAndTransmissionEquipmentAndMediaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_SwitchingAndTransmissionEquipmentAndMediaMember_019c4274-2cde-74fc-b196-bd7d7765f57a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherPropertyPlantAndEquipmentAssetsMember_019c4274-2cde-7d91-973e-a51222f7f1b9" xlink:href="viv-20251231.xsd#viv_OtherPropertyPlantAndEquipmentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentDomain_019c4274-2cde-721e-9e96-9f16d9022b47" xlink:to="loc_viv_OtherPropertyPlantAndEquipmentAssetsMember_019c4274-2cde-7d91-973e-a51222f7f1b9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7ff8-8a4a-3697e9ad03f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7ff8-8a4a-3697e9ad03f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7ff8-8a4a-3697e9ad03f2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7ff8-8a4a-3697e9ad03f2" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7ff8-8a4a-3697e9ad03f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-731d-8d61-63c4ccb60253" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7ff8-8a4a-3697e9ad03f2" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-731d-8d61-63c4ccb60253" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cde-758f-b2c7-ec7ad7f21c4a" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-731d-8d61-63c4ccb60253" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cde-758f-b2c7-ec7ad7f21c4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessAcquisitionVSSMember_019c4274-2cde-7478-9c33-3db33385e344" xlink:href="viv-20251231.xsd#viv_BusinessAcquisitionVSSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-731d-8d61-63c4ccb60253" xlink:to="loc_viv_BusinessAcquisitionVSSMember_019c4274-2cde-7478-9c33-3db33385e344" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2cde-7715-a211-82496c236684" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2cde-7715-a211-82496c236684" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7715-a211-82496c236684_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2cde-7715-a211-82496c236684" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7715-a211-82496c236684_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7837-b6e7-c628bf751ded" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4274-2cde-7715-a211-82496c236684" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7837-b6e7-c628bf751ded" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2cde-7f3e-a7e3-a90273461575" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7837-b6e7-c628bf751ded" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c4274-2cde-7f3e-a7e3-a90273461575" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4274-2cde-74df-ac07-9ccc684401c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4274-2cde-7837-b6e7-c628bf751ded" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4274-2cde-74df-ac07-9ccc684401c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c4274-2cde-75a2-be6e-13ed5ff75717" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:to="loc_ifrs-full_RangeAxis_019c4274-2cde-75a2-be6e-13ed5ff75717" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2cde-75a2-be6e-13ed5ff75717_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2cde-75a2-be6e-13ed5ff75717" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2cde-75a2-be6e-13ed5ff75717_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2cde-7204-ab9f-3c3b2e7192b2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2cde-75a2-be6e-13ed5ff75717" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2cde-7204-ab9f-3c3b2e7192b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c4274-2cde-785c-877d-b6cf2781f39f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2cde-7204-ab9f-3c3b2e7192b2" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c4274-2cde-785c-877d-b6cf2781f39f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c4274-2cde-740d-8783-3db10fe3935b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2cde-7204-ab9f-3c3b2e7192b2" xlink:to="loc_ifrs-full_TopOfRangeMember_019c4274-2cde-740d-8783-3db10fe3935b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c4274-2cde-7a4b-bb2d-e7730338727e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_019c4274-2cde-782a-9551-39b62f5c6c20" xlink:to="loc_srt_StatementScenarioAxis_019c4274-2cde-7a4b-bb2d-e7730338727e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2cde-7a4b-bb2d-e7730338727e_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2cde-7a4b-bb2d-e7730338727e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2cde-7a4b-bb2d-e7730338727e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2cde-7975-b284-478b1cb9b464" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2cde-7a4b-bb2d-e7730338727e" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2cde-7975-b284-478b1cb9b464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c4274-2cde-7a29-8faf-0931281ccfa5" xlink:href="viv-20251231.xsd#viv_ChangesInLeasesAfterAdoptionOfIFRS16Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2cde-7975-b284-478b1cb9b464" xlink:to="loc_viv_ChangesInLeasesAfterAdoptionOfIFRS16Member_019c4274-2cde-7a29-8faf-0931281ccfa5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_019c4274-2cde-7eee-83cb-b62b44e2b48e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_019c4274-2cde-7eee-83cb-b62b44e2b48e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c4274-2cde-7462-a2fa-8c933981e0bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_019c4274-2cde-7462-a2fa-8c933981e0bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment_019c4274-2cde-73dd-9c6a-84fb988fc4c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_RevaluationIncreaseDecreasePropertyPlantAndEquipment_019c4274-2cde-73dd-9c6a-84fb988fc4c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c4274-2cde-7d75-9fbc-55c2cb40257e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_019c4274-2cde-7d75-9fbc-55c2cb40257e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c4274-2cde-77a5-a1d1-0919f8451f3c" xlink:href="viv-20251231.xsd#viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_viv_DecreaseThroughSublettingArrangementsPropertyPlantAndEquipment_019c4274-2cde-77a5-a1d1-0919f8451f3c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c4274-2cde-789b-b9c2-2e2c3a65302a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_019c4274-2cde-789b-b9c2-2e2c3a65302a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c4274-2cde-7aed-b86a-5a5c85f23007" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_019c4274-2cde-7aed-b86a-5a5c85f23007" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WriteOffsNetRelatedToCancellationOfLeaseAgreements_019c4274-2cde-7e79-bc74-ffd09323af56" xlink:href="viv-20251231.xsd#viv_WriteOffsNetRelatedToCancellationOfLeaseAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_viv_WriteOffsNetRelatedToCancellationOfLeaseAgreements_019c4274-2cde-7e79-bc74-ffd09323af56" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c4274-2cde-7c63-97d9-17b082007339" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationRatePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_DepreciationRatePropertyPlantAndEquipment_019c4274-2cde-7c63-97d9-17b082007339" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInAccountingEstimate_019c47bc-6d21-70ea-b757-434a0c8ea946" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseInAccountingEstimate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_IncreaseDecreaseInAccountingEstimate_019c47bc-6d21-70ea-b757-434a0c8ea946" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_019c47bf-93c2-7b64-93a1-4235310682f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_019c4274-2cde-739b-9585-9090e76f7126" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_019c47bf-93c2-7b64-93a1-4235310682f0" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/IntangibleAssetsDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#IntangibleAssetsDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/IntangibleAssetsDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4834-78f9-71b0-8e72-f9b4407b5cae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4834-78f9-71b0-8e72-f9b4407b5cae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c4835-03c4-7ba3-92c4-66541454d373" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4834-78f9-71b0-8e72-f9b4407b5cae" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c4835-03c4-7ba3-92c4-66541454d373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7ba3-92c4-66541454d373_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c4835-03c4-7ba3-92c4-66541454d373" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7ba3-92c4-66541454d373_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c4835-03c4-7ba3-92c4-66541454d373" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillMember_019c4835-03c4-7156-a87e-f90742817d90" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_GoodwillMember_019c4835-03c4-7156-a87e-f90742817d90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LicencesMember_019c4835-03c4-74d2-94d0-bdfbfed7e59d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_LicencesMember_019c4835-03c4-74d2-94d0-bdfbfed7e59d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_019c4835-03c4-7d48-bc1b-05823cb85d11" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_ComputerSoftwareMember_019c4835-03c4-7d48-bc1b-05823cb85d11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_019c4835-03c4-7f28-aa6b-43ae56aeeeb2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_BrandNamesMember_019c4835-03c4-7f28-aa6b-43ae56aeeeb2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c4835-03c4-7ab9-be86-9b6bfd914cdf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c4835-03c4-7ab9-be86-9b6bfd914cdf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherIntangibleAssetsMember_019c4835-03c4-7ceb-ab41-7176ff9f66a2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_OtherIntangibleAssetsMember_019c4835-03c4-7ceb-ab41-7176ff9f66a2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsUnderDevelopmentMember_019c4835-03c4-7ea0-a1b4-823f948a6264" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsUnderDevelopmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c4835-03c4-7858-9839-15a9c7a84b16" xlink:to="loc_ifrs-full_IntangibleAssetsUnderDevelopmentMember_019c4835-03c4-7ea0-a1b4-823f948a6264" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c4835-03c4-7dc2-a77a-2a370aab44a4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4834-78f9-71b0-8e72-f9b4407b5cae" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c4835-03c4-7dc2-a77a-2a370aab44a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7dc2-a77a-2a370aab44a4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4835-03c4-7dc2-a77a-2a370aab44a4" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7dc2-a77a-2a370aab44a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4835-03c4-7dc2-a77a-2a370aab44a4" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member_019c4836-579a-7e36-88c2-d16d78a7b89d" xlink:href="viv-20251231.xsd#viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:to="loc_viv_IPNETCloudServicesAndSystemsDevelopmentLtda.Member_019c4836-579a-7e36-88c2-d16d78a7b89d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4836-9d13-72b9-a6c0-3b99336a10b6" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4836-9d13-72b9-a6c0-3b99336a10b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c4836-e63c-747d-a8ea-c083e500813f" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c4836-e63c-747d-a8ea-c083e500813f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c483a-4ed0-742d-805e-2a42463e8786" xlink:href="viv-20251231.xsd#viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4835-03c4-7c3f-8045-c14f3df93d82" xlink:to="loc_viv_SamaumaBrandsComercioImportacaoEExportacaoDeEletroEletronicosLtda.Member_019c483a-4ed0-742d-805e-2a42463e8786" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4835-03c4-73c5-b2bb-0581e5c1c624" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4834-78f9-71b0-8e72-f9b4407b5cae" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4835-03c4-73c5-b2bb-0581e5c1c624" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-73c5-b2bb-0581e5c1c624_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4835-03c4-73c5-b2bb-0581e5c1c624" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-73c5-b2bb-0581e5c1c624_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-7d8d-b450-0a6d890cae4f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_019c4835-03c4-73c5-b2bb-0581e5c1c624" xlink:to="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-7d8d-b450-0a6d890cae4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_019c4835-03c4-78ac-8982-f3f3f8849d46" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-7d8d-b450-0a6d890cae4f" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_019c4835-03c4-78ac-8982-f3f3f8849d46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4835-03c4-7063-82b3-02234e70aa5d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_019c4835-03c4-7d8d-b450-0a6d890cae4f" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_019c4835-03c4-7063-82b3-02234e70aa5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwill_019c4835-03c4-7079-a50f-b59e13aeabe2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwill_019c4835-03c4-7079-a50f-b59e13aeabe2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7093-9f12-a1f4dfb2af1f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7093-9f12-a1f4dfb2af1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevaluationIncreaseDecreaseIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7b13-befe-9b9140548804" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevaluationIncreaseDecreaseIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_RevaluationIncreaseDecreaseIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7b13-befe-9b9140548804" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill_019c4835-03c4-7836-8e9a-8551e5e4278f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransfersIntangibleAssetsAndGoodwill_019c4835-03c4-7836-8e9a-8551e5e4278f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill_019c4835-03c4-7875-9bef-5d42cc46ad5e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill_019c4835-03c4-7875-9bef-5d42cc46ad5e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7540-948b-8a8a6fcc5953" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c4835-03c4-756a-9fd0-3359373bffe3" xlink:to="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_019c4835-03c4-7540-948b-8a8a6fcc5953" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwill_019c4842-b62a-781c-a8e8-28852df972a1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IntangibleAssetsAndGoodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/IntangibleAssetsDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#IntangibleAssetsDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/IntangibleAssetsDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c484a-90ec-70d7-bd83-bedbd4c60b5e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4845-f370-745d-b906-c9843316c2a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c484a-90ec-70d7-bd83-bedbd4c60b5e" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4845-f370-745d-b906-c9843316c2a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c484a-90ec-7129-8fa5-4a1a286ee562" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4845-f370-745d-b906-c9843316c2a3" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c484a-90ec-7129-8fa5-4a1a286ee562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-7129-8fa5-4a1a286ee562_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c484a-90ec-7129-8fa5-4a1a286ee562" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-7129-8fa5-4a1a286ee562_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_019c484a-90ec-7129-8fa5-4a1a286ee562" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_019c484a-90ec-7225-92a1-3c864baf5ef8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:to="loc_ifrs-full_ComputerSoftwareMember_019c484a-90ec-7225-92a1-3c864baf5ef8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LicencesMember_019c484a-90ec-7416-b446-45eee4333c8f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:to="loc_ifrs-full_LicencesMember_019c484a-90ec-7416-b446-45eee4333c8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_019c484a-90ec-7952-9c03-e1470d6a79b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:to="loc_ifrs-full_BrandNamesMember_019c484a-90ec-7952-9c03-e1470d6a79b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c484a-90ec-7503-b2bd-7db5e88ecf37" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_019c484a-90ec-7503-b2bd-7db5e88ecf37" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherIntangibleAssetsMember_019c484a-90ec-7e35-a1a0-dd4e308e106c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillDomain_019c484a-90ec-717d-9399-085547864601" xlink:to="loc_ifrs-full_OtherIntangibleAssetsMember_019c484a-90ec-7e35-a1a0-dd4e308e106c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c484a-90ec-7b18-956f-34dee9eda708" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_019c4845-f370-745d-b906-c9843316c2a3" xlink:to="loc_ifrs-full_RangeAxis_019c484a-90ec-7b18-956f-34dee9eda708" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c484a-90ec-7b18-956f-34dee9eda708_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c484a-90ec-7b18-956f-34dee9eda708" xlink:to="loc_ifrs-full_RangeDomain_019c484a-90ec-7b18-956f-34dee9eda708_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c484a-90ec-7124-8951-c773de26b30a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c484a-90ec-7b18-956f-34dee9eda708" xlink:to="loc_ifrs-full_RangeDomain_019c484a-90ec-7124-8951-c773de26b30a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c484a-90ec-7479-9e14-b9be36498c7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c484a-90ec-7124-8951-c773de26b30a" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c484a-90ec-7479-9e14-b9be36498c7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c484a-90ec-7bd7-b5e6-23e5b7db8429" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c484a-90ec-7124-8951-c773de26b30a" xlink:to="loc_ifrs-full_TopOfRangeMember_019c484a-90ec-7bd7-b5e6-23e5b7db8429" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmortisationRateIntangibleAssetsOtherThanGoodwill_019c484a-90ec-73b6-b2c9-279ad843a7aa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AmortisationRateIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_019c484a-90ec-70d7-bd83-bedbd4c60b5e" xlink:to="loc_ifrs-full_AmortisationRateIntangibleAssetsOtherThanGoodwill_019c484a-90ec-73b6-b2c9-279ad843a7aa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/IMPAIRMENTOFNONFINANCIALASSETSAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#IMPAIRMENTOFNONFINANCIALASSETSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/IMPAIRMENTOFNONFINANCIALASSETSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable_019c4274-2cde-7d24-aa93-30622afeeeac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable_019c4274-2cde-7d24-aa93-30622afeeeac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c491d-09fc-70ef-9c0a-c72a28245d76" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable_019c4274-2cde-7d24-aa93-30622afeeeac" xlink:to="loc_ifrs-full_RangeAxis_019c491d-09fc-70ef-9c0a-c72a28245d76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c491d-09fc-70ef-9c0a-c72a28245d76_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c491d-09fc-70ef-9c0a-c72a28245d76" xlink:to="loc_ifrs-full_RangeDomain_019c491d-09fc-70ef-9c0a-c72a28245d76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c491d-2a5c-739b-9c9b-fd224b12b3f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c491d-09fc-70ef-9c0a-c72a28245d76" xlink:to="loc_ifrs-full_RangeDomain_019c491d-2a5c-739b-9c9b-fd224b12b3f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c491d-901c-7102-82ac-4bc0fd41a809" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c491d-2a5c-739b-9c9b-fd224b12b3f3" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c491d-901c-7102-82ac-4bc0fd41a809" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c491d-be51-7bca-a46f-d7b0bf6d0ddb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c491d-2a5c-739b-9c9b-fd224b12b3f3" xlink:to="loc_ifrs-full_TopOfRangeMember_019c491d-be51-7bca-a46f-d7b0bf6d0ddb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_019c4274-2cde-7b6b-9ccf-58156263d49b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_019c4274-2cde-7b6b-9ccf-58156263d49b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DescriptionOfPreTaxDiscountRatesAppliedToCashFlowProjections_019c4274-2cde-7267-ad81-2b7457335749" xlink:href="viv-20251231.xsd#viv_DescriptionOfPreTaxDiscountRatesAppliedToCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_DescriptionOfPreTaxDiscountRatesAppliedToCashFlowProjections_019c4274-2cde-7267-ad81-2b7457335749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GoodwillAssessmentTerm_019c4274-2cde-7cf2-91e0-118c7b1a236c" xlink:href="viv-20251231.xsd#viv_GoodwillAssessmentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_GoodwillAssessmentTerm_019c4274-2cde-7cf2-91e0-118c7b1a236c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c4274-2cde-736b-82d4-ad66c945b486" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_019c4274-2cde-736b-82d4-ad66c945b486" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DescriptionOfInflationRateAppliedToCashFlowProjections_019c4274-2cde-724c-b0f9-a5409298a06f" xlink:href="viv-20251231.xsd#viv_DescriptionOfInflationRateAppliedToCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_DescriptionOfInflationRateAppliedToCashFlowProjections_019c4274-2cde-724c-b0f9-a5409298a06f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RecoverableValueOfWACC_019c4274-2cde-7a9b-bd5f-554ab589439d" xlink:href="viv-20251231.xsd#viv_RecoverableValueOfWACC"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_RecoverableValueOfWACC_019c4274-2cde-7a9b-bd5f-554ab589439d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PerpetuityGrowthRate_019c4274-2cde-735d-b8a5-0b88e2d8df43" xlink:href="viv-20251231.xsd#viv_PerpetuityGrowthRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_PerpetuityGrowthRate_019c4274-2cde-735d-b8a5-0b88e2d8df43" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfReductionOfChangesInFinancialAndOperational_019c4274-2cde-7456-88f0-41496f376b8e" xlink:href="viv-20251231.xsd#viv_PercentageOfReductionOfChangesInFinancialAndOperational"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems_019c4274-2cde-7f11-a94f-b42060d01a34" xlink:to="loc_viv_PercentageOfReductionOfChangesInFinancialAndOperational_019c4274-2cde-7456-88f0-41496f376b8e" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PERSONNELSOCIALCHARGESANDBENEFITSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PERSONNELSOCIALCHARGESANDBENEFITSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PERSONNELSOCIALCHARGESANDBENEFITSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:href="viv-20251231.xsd#viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsTable_019c4274-2cde-74c9-a367-15db06188a15" xlink:href="viv-20251231.xsd#viv_DisclosureOfPersonnelSocialChargesAndBenefitsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:to="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsTable_019c4274-2cde-74c9-a367-15db06188a15" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfProvisionsForEmployeeBenefitsAxis_019c4274-2cde-7f37-9377-cceab1cf3a5f" xlink:href="viv-20251231.xsd#viv_TypeOfProvisionsForEmployeeBenefitsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsTable_019c4274-2cde-74c9-a367-15db06188a15" xlink:to="loc_viv_TypeOfProvisionsForEmployeeBenefitsAxis_019c4274-2cde-7f37-9377-cceab1cf3a5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-7f37-9377-cceab1cf3a5f_default" xlink:href="viv-20251231.xsd#viv_ProvisionsForEmployeeBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypeOfProvisionsForEmployeeBenefitsAxis_019c4274-2cde-7f37-9377-cceab1cf3a5f" xlink:to="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-7f37-9377-cceab1cf3a5f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:href="viv-20251231.xsd#viv_ProvisionsForEmployeeBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypeOfProvisionsForEmployeeBenefitsAxis_019c4274-2cde-7f37-9377-cceab1cf3a5f" xlink:to="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SocialChargesAndBenefitsMember_019c4274-2cde-78e6-b5a9-60c2be39d4e3" xlink:href="viv-20251231.xsd#viv_SocialChargesAndBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:to="loc_viv_SocialChargesAndBenefitsMember_019c4274-2cde-78e6-b5a9-60c2be39d4e3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProfitSharingMember_019c4274-2cde-7a81-a152-89e0e9c01756" xlink:href="viv-20251231.xsd#viv_ProfitSharingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:to="loc_viv_ProfitSharingMember_019c4274-2cde-7a81-a152-89e0e9c01756" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareBasedPaymentPlansMember_019c4274-2cde-7426-8167-d1d01f7c74cf" xlink:href="viv-20251231.xsd#viv_ShareBasedPaymentPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:to="loc_viv_ShareBasedPaymentPlansMember_019c4274-2cde-7426-8167-d1d01f7c74cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SalariesAndWagesMember_019c4274-2cde-7cd0-aa1f-5d58e42cf86e" xlink:href="viv-20251231.xsd#viv_SalariesAndWagesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:to="loc_viv_SalariesAndWagesMember_019c4274-2cde-7cd0-aa1f-5d58e42cf86e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionsForEmployeeBenefitsMember_019c4274-2cde-7601-80b7-b261035f4d0b" xlink:href="viv-20251231.xsd#viv_OtherProvisionsForEmployeeBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ProvisionsForEmployeeBenefitsMember_019c4274-2cde-74c9-8d84-ed551f0c5f50" xlink:to="loc_viv_OtherProvisionsForEmployeeBenefitsMember_019c4274-2cde-7601-80b7-b261035f4d0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionsForEmployeeBenefits_019c4274-2cde-72ce-a8f9-0103e07a8245" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionsForEmployeeBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:to="loc_ifrs-full_ProvisionsForEmployeeBenefits_019c4274-2cde-72ce-a8f9-0103e07a8245" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans_019c4274-2cde-7f05-b8db-ab8ca1c1e888" xlink:href="viv-20251231.xsd#viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:to="loc_viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans_019c4274-2cde-7f05-b8db-ab8ca1c1e888" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_019c4274-2cde-7c29-b016-ba884c81b2ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentProvisionsForEmployeeBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:to="loc_ifrs-full_CurrentProvisionsForEmployeeBenefits_019c4274-2cde-7c29-b016-ba884c81b2ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_019c4274-2cde-7fbf-b428-cb8ba4edfda0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentProvisionsForEmployeeBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfPersonnelSocialChargesAndBenefitsLineItems_019c4274-2cde-7b4d-9cbd-e706127218fe" xlink:to="loc_ifrs-full_NoncurrentProvisionsForEmployeeBenefits_019c4274-2cde-7fbf-b428-cb8ba4edfda0" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/TAXESCHARGESANDCONTRIBUTIONSPAYABLEDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#TAXESCHARGESANDCONTRIBUTIONSPAYABLEDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/TAXESCHARGESANDCONTRIBUTIONSPAYABLEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems_019c4274-2cde-72fd-8c7a-bfedeb94eb76" xlink:href="viv-20251231.xsd#viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableTable_019c4274-2cde-76f1-b45d-efaab3c9bc90" xlink:href="viv-20251231.xsd#viv_DisclosureOfTaxesFeesAndContributionsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems_019c4274-2cde-72fd-8c7a-bfedeb94eb76" xlink:to="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableTable_019c4274-2cde-76f1-b45d-efaab3c9bc90" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypesOfTaxesChargesAndContributionsPayableAxis_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2" xlink:href="viv-20251231.xsd#viv_TypesOfTaxesChargesAndContributionsPayableAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableTable_019c4274-2cde-76f1-b45d-efaab3c9bc90" xlink:to="loc_viv_TypesOfTaxesChargesAndContributionsPayableAxis_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2_default" xlink:href="viv-20251231.xsd#viv_TaxesChargesAndContributionsPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypesOfTaxesChargesAndContributionsPayableAxis_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2" xlink:to="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:href="viv-20251231.xsd#viv_TaxesChargesAndContributionsPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypesOfTaxesChargesAndContributionsPayableAxis_019c4274-2cde-773e-b6cd-2ee3b8bbb9f2" xlink:to="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FistelMember_019c4274-2cde-76b2-a9c9-ec6c193661d3" xlink:href="viv-20251231.xsd#viv_FistelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:to="loc_viv_FistelMember_019c4274-2cde-76b2-a9c9-ec6c193661d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ICMSMember_019c4274-2cde-763a-9674-454d07a0630a" xlink:href="viv-20251231.xsd#viv_ICMSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:to="loc_viv_ICMSMember_019c4274-2cde-763a-9674-454d07a0630a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PISAndCOFINSMember_019c4274-2cde-7e6a-8a4b-140c2a227ef3" xlink:href="viv-20251231.xsd#viv_PISAndCOFINSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:to="loc_viv_PISAndCOFINSMember_019c4274-2cde-7e6a-8a4b-140c2a227ef3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FustAndFunttelMember_019c4274-2cde-7074-a034-8eb6a8d5a5c3" xlink:href="viv-20251231.xsd#viv_FustAndFunttelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:to="loc_viv_FustAndFunttelMember_019c4274-2cde-7074-a034-8eb6a8d5a5c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherTaxesMember_019c4274-2cde-7149-ad87-925f4d19dde1" xlink:href="viv-20251231.xsd#viv_OtherTaxesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesChargesAndContributionsPayableMember_019c4274-2cde-7e6c-9d53-67ca29ba16d5" xlink:to="loc_viv_OtherTaxesMember_019c4274-2cde-7149-ad87-925f4d19dde1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxLiabilities_019c4274-2cde-7013-9ff5-cc6f47a32442" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems_019c4274-2cde-72fd-8c7a-bfedeb94eb76" xlink:to="loc_ifrs-full_CurrentTaxLiabilities_019c4274-2cde-7013-9ff5-cc6f47a32442" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxLiabilitiesCurrent_019c4274-2cde-7ddf-bafc-a7329577e5ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems_019c4274-2cde-72fd-8c7a-bfedeb94eb76" xlink:to="loc_ifrs-full_CurrentTaxLiabilitiesCurrent_019c4274-2cde-7ddf-bafc-a7329577e5ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentTaxLiabilitiesNoncurrent_019c4274-2cde-7d2c-ac3d-88e56d8ff805" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentTaxLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfTaxesFeesAndContributionsPayableLineItems_019c4274-2cde-72fd-8c7a-bfedeb94eb76" xlink:to="loc_ifrs-full_CurrentTaxLiabilitiesNoncurrent_019c4274-2cde-7d2c-ac3d-88e56d8ff805" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/DIVIDENDSANDINTERESTONEQUITYBreakdownDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#DIVIDENDSANDINTERESTONEQUITYBreakdownDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/DIVIDENDSANDINTERESTONEQUITYBreakdownDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfDividendsAndInterestOnEquityLineItems_019c4274-2cde-7c64-8d4e-e198d7aa2ebc" xlink:href="viv-20251231.xsd#viv_DisclosureOfDividendsAndInterestOnEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfDividendsAndInterestOnEquityTable_019c4274-2cde-7bd8-9fee-1b43c3757cd9" xlink:href="viv-20251231.xsd#viv_DisclosureOfDividendsAndInterestOnEquityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfDividendsAndInterestOnEquityLineItems_019c4274-2cde-7c64-8d4e-e198d7aa2ebc" xlink:to="loc_viv_DisclosureOfDividendsAndInterestOnEquityTable_019c4274-2cde-7bd8-9fee-1b43c3757cd9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2cde-7df0-9fb3-130382c94d5d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfDividendsAndInterestOnEquityTable_019c4274-2cde-7bd8-9fee-1b43c3757cd9" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2cde-7df0-9fb3-130382c94d5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7df0-9fb3-130382c94d5d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2cde-7df0-9fb3-130382c94d5d" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7df0-9fb3-130382c94d5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2cde-7df0-9fb3-130382c94d5d" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2cde-7ebe-bd83-dd68151db432" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParentMember_019c4274-2cde-7ebe-bd83-dd68151db432" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaS.a.Member_019c4274-2cde-7690-8062-addc8c362a45" xlink:href="viv-20251231.xsd#viv_TelefonicaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_viv_TelefonicaS.a.Member_019c4274-2cde-7690-8062-addc8c362a45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaLatinoamericaHoldingS.l.Member_019c4274-2cde-7f78-aa23-3c21bc26aa78" xlink:href="viv-20251231.xsd#viv_TelefonicaLatinoamericaHoldingS.l.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_viv_TelefonicaLatinoamericaHoldingS.l.Member_019c4274-2cde-7f78-aa23-3c21bc26aa78" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaChileS.a.Member_019c4274-2cde-7bdb-a956-44e86ffbd3aa" xlink:href="viv-20251231.xsd#viv_TelefonicaChileS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_viv_TelefonicaChileS.a.Member_019c4274-2cde-7bdb-a956-44e86ffbd3aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SpTelecomunicacoesParticipacoesLtdaMember_019c4274-2cde-7997-9190-aabca4df9122" xlink:href="viv-20251231.xsd#viv_SpTelecomunicacoesParticipacoesLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_viv_SpTelecomunicacoesParticipacoesLtdaMember_019c4274-2cde-7997-9190-aabca4df9122" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaIoTBigDataTechMember_019c4274-2cde-7281-bec8-6ca618a30bbd" xlink:href="viv-20251231.xsd#viv_TelefonicaIoTBigDataTechMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_viv_TelefonicaIoTBigDataTechMember_019c4274-2cde-7281-bec8-6ca618a30bbd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterestsMember_019c4274-2cde-78c0-9ad1-6de1fea010c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncontrollingInterestsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2cde-7861-8423-7938a3588010" xlink:to="loc_ifrs-full_NoncontrollingInterestsMember_019c4274-2cde-78c0-9ad1-6de1fea010c3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WithholdingIncomeTaxRate_019c4274-2cde-7791-a1b6-355a753973b4" xlink:href="viv-20251231.xsd#viv_WithholdingIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfDividendsAndInterestOnEquityLineItems_019c4274-2cde-7c64-8d4e-e198d7aa2ebc" xlink:to="loc_viv_WithholdingIncomeTaxRate_019c4274-2cde-7791-a1b6-355a753973b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DividendAndInterestOnEquityCurrentPayable_019c4274-2cde-7ec6-905d-b4d9de21b5b4" xlink:href="viv-20251231.xsd#viv_DividendAndInterestOnEquityCurrentPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfDividendsAndInterestOnEquityLineItems_019c4274-2cde-7c64-8d4e-e198d7aa2ebc" xlink:to="loc_viv_DividendAndInterestOnEquityCurrentPayable_019c4274-2cde-7ec6-905d-b4d9de21b5b4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESBreakdownofchangesinprovisionsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PROVISIONSANDCONTINGENCIESBreakdownofchangesinprovisionsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESBreakdownofchangesinprovisionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-770e-a8a2-19b92c5dd3d0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-770e-a8a2-19b92c5dd3d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-720f-bca6-9a8556d06b87" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-770e-a8a2-19b92c5dd3d0" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-720f-bca6-9a8556d06b87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-720f-bca6-9a8556d06b87_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-720f-bca6-9a8556d06b87" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-720f-bca6-9a8556d06b87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-720f-bca6-9a8556d06b87" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-79c0-b692-9e913a933177" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-79c0-b692-9e913a933177" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7ef6-841f-fc004d7bcf41" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7ef6-841f-fc004d7bcf41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7db2-baa3-a89d1ca87bb1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LegalProceedingsProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7db2-baa3-a89d1ca87bb1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLaborMember_019c4274-2cde-7f6f-ad60-714b9009271c" xlink:href="viv-20251231.xsd#viv_ProvisionForLaborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_viv_ProvisionForLaborMember_019c4274-2cde-7f6f-ad60-714b9009271c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContingentConsiderationMember_019c4274-2cde-75f5-b6eb-bb5e67d56af2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_ifrs-full_ContingentConsiderationMember_019c4274-2cde-75f5-b6eb-bb5e67d56af2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForFinesForCancelingLeaseAgreementsMember_019c4274-2cde-7ce4-b450-7eb98c7b7358" xlink:href="viv-20251231.xsd#viv_ProvisionForFinesForCancelingLeaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_viv_ProvisionForFinesForCancelingLeaseAgreementsMember_019c4274-2cde-7ce4-b450-7eb98c7b7358" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_019c4274-2cde-7bdd-8923-bc3149e5d4a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember_019c4274-2cde-7bdd-8923-bc3149e5d4a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmountsToBeRefundedToCustomersMember_019c4274-2cde-7106-bdd4-fa74062b9b8e" xlink:href="viv-20251231.xsd#viv_AmountsToBeRefundedToCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7ba6-a573-42822bf1d779" xlink:to="loc_viv_AmountsToBeRefundedToCustomersMember_019c4274-2cde-7106-bdd4-fa74062b9b8e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7684-9e96-9497b319f2f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-770e-a8a2-19b92c5dd3d0" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7684-9e96-9497b319f2f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7684-9e96-9497b319f2f6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7684-9e96-9497b319f2f6" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7684-9e96-9497b319f2f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c4274-2cde-7684-9e96-9497b319f2f6" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GarliavaRjInfraestruturaERedesDeTelecomunicacoesS.a.Member_019c4274-2cde-77fd-80a3-8eeb91b42635" xlink:href="viv-20251231.xsd#viv_GarliavaRjInfraestruturaERedesDeTelecomunicacoesS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_GarliavaRjInfraestruturaERedesDeTelecomunicacoesS.a.Member_019c4274-2cde-77fd-80a3-8eeb91b42635" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cde-7ba0-ad91-e42f99678200" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cde-7ba0-ad91-e42f99678200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationValeSaudeSempreMember_019c4274-2cde-72b9-94a1-955d8d545d99" xlink:href="viv-20251231.xsd#viv_BusinessCombinationValeSaudeSempreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_BusinessCombinationValeSaudeSempreMember_019c4274-2cde-72b9-94a1-955d8d545d99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c4274-2cde-7ca1-8682-41c144f7259c" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c4274-2cde-7ca1-8682-41c144f7259c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c57dc-3386-7e36-bfcb-f0a44fdc9a34" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c57dc-3386-7e36-bfcb-f0a44fdc9a34" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c57dc-ce30-7b84-a461-7a22828a6b5d" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c57dc-ce30-7b84-a461-7a22828a6b5d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationCyberMember_019c57dd-7fc0-747c-8405-6ce647a9dbfc" xlink:href="viv-20251231.xsd#viv_BusinessCombinationCyberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c4274-2cde-7026-8cd0-d8bda70b91e3" xlink:to="loc_viv_BusinessCombinationCyberMember_019c57dd-7fc0-747c-8405-6ce647a9dbfc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProbableLossesProvisions_019c4274-2cde-72c5-a340-f315a3dd7216" xlink:href="viv-20251231.xsd#viv_ProbableLossesProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_ProbableLossesProvisions_019c4274-2cde-72c5-a340-f315a3dd7216" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfImportDuty_019c4274-2cde-7f28-b642-3591392659a4" xlink:href="viv-20251231.xsd#viv_PercentageOfImportDuty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_PercentageOfImportDuty_019c4274-2cde-7f28-b642-3591392659a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisions_019c4274-2cde-7aa8-a4f5-49e3934f6bc6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_ifrs-full_OtherProvisions_019c4274-2cde-7aa8-a4f5-49e3934f6bc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseByAdditionsReversalOtherProvisions_019c4274-2cde-77ba-b802-61cd4209c722" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseByAdditionsReversalOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_IncreaseDecreaseByAdditionsReversalOtherProvisions_019c4274-2cde-77ba-b802-61cd4209c722" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AdditionalProvisionsInflowsExceptIncomeOtherProvisions_019c4274-2cde-7bfa-a5cb-45fd37e698bf" xlink:href="viv-20251231.xsd#viv_AdditionalProvisionsInflowsExceptIncomeOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_AdditionalProvisionsInflowsExceptIncomeOtherProvisions_019c4274-2cde-7bfa-a5cb-45fd37e698bf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionPaidOtherProvisions_019c4274-2cde-7aed-bf5d-59be1bc94d0a" xlink:href="viv-20251231.xsd#viv_ProvisionPaidOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_ProvisionPaidOtherProvisions_019c4274-2cde-7aed-bf5d-59be1bc94d0a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions_019c4274-2cde-713a-ad21-5ce5142306f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsOtherProvisions_019c4274-2cde-713a-ad21-5ce5142306f7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseThroughInterestAccrualsOtherProvisions_019c4274-2cde-7811-afb0-a54509b14ace" xlink:href="viv-20251231.xsd#viv_IncreaseThroughInterestAccrualsOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_IncreaseThroughInterestAccrualsOtherProvisions_019c4274-2cde-7811-afb0-a54509b14ace" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherShorttermProvisions_019c4274-2cde-7aac-82c5-2dda530a0ec2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherShorttermProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_ifrs-full_OtherShorttermProvisions_019c4274-2cde-7aac-82c5-2dda530a0ec2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherLongtermProvisions_019c4274-2cde-71e4-a430-d09ac4325393" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherLongtermProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_ifrs-full_OtherLongtermProvisions_019c4274-2cde-71e4-a430-d09ac4325393" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PossibleLossesProvisions_019c4274-2cde-7c3a-bc39-b7dc32769c0f" xlink:href="viv-20251231.xsd#viv_PossibleLossesProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_PossibleLossesProvisions_019c4274-2cde-7c3a-bc39-b7dc32769c0f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WriteOffsDueToTheCompanysAdherenceToTaxAmnestyPrograms_019c4274-2cde-7007-852b-35b5fb75a303" xlink:href="viv-20251231.xsd#viv_WriteOffsDueToTheCompanysAdherenceToTaxAmnestyPrograms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_WriteOffsDueToTheCompanysAdherenceToTaxAmnestyPrograms_019c4274-2cde-7007-852b-35b5fb75a303" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GainsFromTheReversalOfOperatingExpensesOfProvisionForContingencies_019c4274-2cde-7111-b266-10b84d41fa7d" xlink:href="viv-20251231.xsd#viv_GainsFromTheReversalOfOperatingExpensesOfProvisionForContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_GainsFromTheReversalOfOperatingExpensesOfProvisionForContingencies_019c4274-2cde-7111-b266-10b84d41fa7d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GainsFromTheReversalOfFinancialExpensesOfMonetaryUpdateOfProvisionsForContingencies_019c4274-2cde-78ad-bb72-143e3c17dd30" xlink:href="viv-20251231.xsd#viv_GainsFromTheReversalOfFinancialExpensesOfMonetaryUpdateOfProvisionsForContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_GainsFromTheReversalOfFinancialExpensesOfMonetaryUpdateOfProvisionsForContingencies_019c4274-2cde-78ad-bb72-143e3c17dd30" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AssumptionOfDebt_019c4274-2cde-76dc-96df-36119530adc4" xlink:href="viv-20251231.xsd#viv_AssumptionOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_AssumptionOfDebt_019c4274-2cde-76dc-96df-36119530adc4" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WriteOffDueToTheCommitmentAgreementAssociatedWithTheSelfCompositionNegotiations_019c4274-2cde-7cb5-88f6-559f3d4f5bca" xlink:href="viv-20251231.xsd#viv_WriteOffDueToTheCommitmentAgreementAssociatedWithTheSelfCompositionNegotiations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-71bd-9649-c67ac097fda0" xlink:to="loc_viv_WriteOffDueToTheCommitmentAgreementAssociatedWithTheSelfCompositionNegotiations_019c4274-2cde-7cb5-88f6-559f3d4f5bca" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESTaxProvisionandContingenciesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PROVISIONSANDCONTINGENCIESTaxProvisionandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESTaxProvisionandContingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-72ad-8f35-1115d34df1db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-72ad-8f35-1115d34df1db" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramAxis_019c4274-2cde-7a6a-82af-de42f22b72ce" xlink:href="viv-20251231.xsd#viv_AmnestyProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-72ad-8f35-1115d34df1db" xlink:to="loc_viv_AmnestyProgramAxis_019c4274-2cde-7a6a-82af-de42f22b72ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramDomain_019c4274-2cde-7a6a-82af-de42f22b72ce_default" xlink:href="viv-20251231.xsd#viv_AmnestyProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_AmnestyProgramAxis_019c4274-2cde-7a6a-82af-de42f22b72ce" xlink:to="loc_viv_AmnestyProgramDomain_019c4274-2cde-7a6a-82af-de42f22b72ce_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramDomain_019c4274-2cde-766d-bd46-793e583f56ae" xlink:href="viv-20251231.xsd#viv_AmnestyProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_AmnestyProgramAxis_019c4274-2cde-7a6a-82af-de42f22b72ce" xlink:to="loc_viv_AmnestyProgramDomain_019c4274-2cde-766d-bd46-793e583f56ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateOfSaoPauloAmnestyProgramMember_019c4274-2cde-768b-9fe7-d3dd84d2be81" xlink:href="viv-20251231.xsd#viv_StateOfSaoPauloAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c4274-2cde-766d-bd46-793e583f56ae" xlink:to="loc_viv_StateOfSaoPauloAmnestyProgramMember_019c4274-2cde-768b-9fe7-d3dd84d2be81" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateOfParanaAmnestyProgramMember_019c4274-2cde-733a-8b7f-2166aa48bc98" xlink:href="viv-20251231.xsd#viv_StateOfParanaAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c4274-2cde-766d-bd46-793e583f56ae" xlink:to="loc_viv_StateOfParanaAmnestyProgramMember_019c4274-2cde-733a-8b7f-2166aa48bc98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateOfRioGrandeDoSulAmnestyProgramMember_019c5817-c116-7157-8aa8-5c6fabc0d6f4" xlink:href="viv-20251231.xsd#viv_StateOfRioGrandeDoSulAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c4274-2cde-766d-bd46-793e583f56ae" xlink:to="loc_viv_StateOfRioGrandeDoSulAmnestyProgramMember_019c5817-c116-7157-8aa8-5c6fabc0d6f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionsProcessesAxis_019c4274-2cde-7adc-8690-f72398c3abe5" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionsProcessesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-72ad-8f35-1115d34df1db" xlink:to="loc_viv_RegulatoryProvisionsProcessesAxis_019c4274-2cde-7adc-8690-f72398c3abe5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7adc-8690-f72398c3abe5_default" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionsProcessesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_RegulatoryProvisionsProcessesAxis_019c4274-2cde-7adc-8690-f72398c3abe5" xlink:to="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7adc-8690-f72398c3abe5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7f9b-bddd-110e753fa0ce" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionsProcessesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_RegulatoryProvisionsProcessesAxis_019c4274-2cde-7adc-8690-f72398c3abe5" xlink:to="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7f9b-bddd-110e753fa0ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryAmnestyMember_019c5829-8977-7a4d-aaa7-d1daecf72dd1" xlink:href="viv-20251231.xsd#viv_RegulatoryAmnestyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7f9b-bddd-110e753fa0ce" xlink:to="loc_viv_RegulatoryAmnestyMember_019c5829-8977-7a4d-aaa7-d1daecf72dd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MainThemesMember_019c4274-2cde-704d-a9a0-c06a84182392" xlink:href="viv-20251231.xsd#viv_MainThemesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7f9b-bddd-110e753fa0ce" xlink:to="loc_viv_MainThemesMember_019c4274-2cde-704d-a9a0-c06a84182392" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCasesMember_019c4274-2cde-7709-bc70-419285079b97" xlink:href="viv-20251231.xsd#viv_OtherCasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RegulatoryProvisionsProcessesDomain_019c4274-2cde-7f9b-bddd-110e753fa0ce" xlink:to="loc_viv_OtherCasesMember_019c4274-2cde-7709-bc70-419285079b97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RelevantCasesAxis_019c4274-2cde-746e-877b-394d505dab4c" xlink:href="viv-20251231.xsd#viv_RelevantCasesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-72ad-8f35-1115d34df1db" xlink:to="loc_viv_RelevantCasesAxis_019c4274-2cde-746e-877b-394d505dab4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RelevantCasesDomain_019c4274-2cde-746e-877b-394d505dab4c_default" xlink:href="viv-20251231.xsd#viv_RelevantCasesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_RelevantCasesAxis_019c4274-2cde-746e-877b-394d505dab4c" xlink:to="loc_viv_RelevantCasesDomain_019c4274-2cde-746e-877b-394d505dab4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:href="viv-20251231.xsd#viv_RelevantCasesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_RelevantCasesAxis_019c4274-2cde-746e-877b-394d505dab4c" xlink:to="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RevenuesThatShouldBeIncludedInTheCalculationMember_019c4274-2cde-7d3c-9632-d703b31e737d" xlink:href="viv-20251231.xsd#viv_RevenuesThatShouldBeIncludedInTheCalculationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:to="loc_viv_RevenuesThatShouldBeIncludedInTheCalculationMember_019c4274-2cde-7d3c-9632-d703b31e737d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PADOMember_019c4274-2cde-72ea-9e19-1339ab1302f5" xlink:href="viv-20251231.xsd#viv_PADOMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:to="loc_viv_PADOMember_019c4274-2cde-72ea-9e19-1339ab1302f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CADEMember_019c4274-2cde-7353-830e-ee5087f80fd3" xlink:href="viv-20251231.xsd#viv_CADEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:to="loc_viv_CADEMember_019c4274-2cde-7353-830e-ee5087f80fd3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ANATELMember_019c4274-2cde-74cc-98ea-722987a78d1d" xlink:href="viv-20251231.xsd#viv_ANATELMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_RelevantCasesDomain_019c4274-2cde-7f09-8fbf-263c72dcd66d" xlink:to="loc_viv_ANATELMember_019c4274-2cde-74cc-98ea-722987a78d1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestDiscountRelatedToRenegotiations_019c5808-7d1e-777a-9449-5bbb9badb14b" xlink:href="viv-20251231.xsd#viv_InterestDiscountRelatedToRenegotiations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_InterestDiscountRelatedToRenegotiations_019c5808-7d1e-777a-9449-5bbb9badb14b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DiscountOnOutstandingBalanceRelatedToRenegotiations_019c580a-9efb-7941-9a23-aa56c4a2f77e" xlink:href="viv-20251231.xsd#viv_DiscountOnOutstandingBalanceRelatedToRenegotiations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_DiscountOnOutstandingBalanceRelatedToRenegotiations_019c580a-9efb-7941-9a23-aa56c4a2f77e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionedAmountForICMSDisputes_019c4274-2cde-7a7b-b394-939ecb527cde" xlink:href="viv-20251231.xsd#viv_ProvisionedAmountForICMSDisputes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_ProvisionedAmountForICMSDisputes_019c4274-2cde-7a7b-b394-939ecb527cde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionedAmountForICMSDisputesAfterRefinancingProgram_019c4274-2cde-7126-bef8-141a91cd00dc" xlink:href="viv-20251231.xsd#viv_ProvisionedAmountForICMSDisputesAfterRefinancingProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_ProvisionedAmountForICMSDisputesAfterRefinancingProgram_019c4274-2cde-7126-bef8-141a91cd00dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfInstallmentsForPaymentsOffered_019c580c-ed48-701f-90a6-662a061a3698" xlink:href="viv-20251231.xsd#viv_NumberOfInstallmentsForPaymentsOffered"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_NumberOfInstallmentsForPaymentsOffered_019c580c-ed48-701f-90a6-662a061a3698" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherRegulatoryProvisions_019c4274-2cde-7b01-930d-4ba35bed5d68" xlink:href="viv-20251231.xsd#viv_OtherRegulatoryProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_OtherRegulatoryProvisions_019c4274-2cde-7b01-930d-4ba35bed5d68" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PossibleLossesOfRegulatoryContingencies_019c4274-2cde-77d3-b623-b0662caf4364" xlink:href="viv-20251231.xsd#viv_PossibleLossesOfRegulatoryContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_PossibleLossesOfRegulatoryContingencies_019c4274-2cde-77d3-b623-b0662caf4364" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConcessionPlans_019c4274-2cde-7d0c-8de4-6b1465de5c75" xlink:href="viv-20251231.xsd#viv_ConcessionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_ConcessionPlans_019c4274-2cde-7d0c-8de4-6b1465de5c75" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FineAplied_019c4274-2cde-7190-948f-d9c9d708d1aa" xlink:href="viv-20251231.xsd#viv_FineAplied"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_FineAplied_019c4274-2cde-7190-948f-d9c9d708d1aa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_UpdatedFineAplied_019c4274-2cde-7100-b8ac-41b161658b6c" xlink:href="viv-20251231.xsd#viv_UpdatedFineAplied"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_UpdatedFineAplied_019c4274-2cde-7100-b8ac-41b161658b6c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReimbursementToMonitorCompliance_019c4274-2cde-7b71-9954-dac95773c904" xlink:href="viv-20251231.xsd#viv_ReimbursementToMonitorCompliance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d1e-be51-66837dd7c53d" xlink:to="loc_viv_ReimbursementToMonitorCompliance_019c4274-2cde-7b71-9954-dac95773c904" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESLaborprovisionsandcontingenciesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PROVISIONSANDCONTINGENCIESLaborprovisionsandcontingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PROVISIONSANDCONTINGENCIESLaborprovisionsandcontingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-783a-8708-ef5ab3f660d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-783a-8708-ef5ab3f660d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-783a-8708-ef5ab3f660d4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-783a-8708-ef5ab3f660d4" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-783a-8708-ef5ab3f660d4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfOtherProvisionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_019c4274-2cde-783a-8708-ef5ab3f660d4" xlink:to="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-7125-a152-24a501228bd0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:to="loc_ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember_019c4274-2cde-7125-a152-24a501228bd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7bee-9570-bfe345e9c236" xlink:href="viv-20251231.xsd#viv_RegulatoryProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:to="loc_viv_RegulatoryProvisionMember_019c4274-2cde-7bee-9570-bfe345e9c236" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7e2c-bb23-192c8700064c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LegalProceedingsProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:to="loc_ifrs-full_LegalProceedingsProvisionMember_019c4274-2cde-7e2c-bb23-192c8700064c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionForLaborMember_019c4274-2cde-76a3-b2ac-36b9cebe0077" xlink:href="viv-20251231.xsd#viv_ProvisionForLaborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfOtherProvisionsDomain_019c4274-2cde-7424-8310-808e16d367bf" xlink:to="loc_viv_ProvisionForLaborMember_019c4274-2cde-76a3-b2ac-36b9cebe0077" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypesOfProvisionsAxis_019c4274-2cde-78e6-86c3-08458191045e" xlink:href="viv-20251231.xsd#viv_TypesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:to="loc_viv_TypesOfProvisionsAxis_019c4274-2cde-78e6-86c3-08458191045e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-78e6-86c3-08458191045e_default" xlink:href="viv-20251231.xsd#viv_TaxesAndContingenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypesOfProvisionsAxis_019c4274-2cde-78e6-86c3-08458191045e" xlink:to="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-78e6-86c3-08458191045e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-7973-82a1-e8c8b6cee23c" xlink:href="viv-20251231.xsd#viv_TaxesAndContingenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypesOfProvisionsAxis_019c4274-2cde-78e6-86c3-08458191045e" xlink:to="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-7973-82a1-e8c8b6cee23c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxProvisionsMember_019c4274-2cde-7a42-b764-a182c775d18f" xlink:href="viv-20251231.xsd#viv_TaxProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-7973-82a1-e8c8b6cee23c" xlink:to="loc_viv_TaxProvisionsMember_019c4274-2cde-7a42-b764-a182c775d18f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PossibleLossesTaxContingenciesMember_019c4274-2cde-7b9b-ace6-67ba538c37c4" xlink:href="viv-20251231.xsd#viv_PossibleLossesTaxContingenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TaxesAndContingenciesMember_019c4274-2cde-7973-82a1-e8c8b6cee23c" xlink:to="loc_viv_PossibleLossesTaxContingenciesMember_019c4274-2cde-7b9b-ace6-67ba538c37c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsTypeOfArrangementAxis_019c4274-2cde-7ada-bce9-68841a0c28d8" xlink:href="viv-20251231.xsd#viv_IfrsTypeOfArrangementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:to="loc_viv_IfrsTypeOfArrangementAxis_019c4274-2cde-7ada-bce9-68841a0c28d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsArrangementsAndNonarrangementTransactionsMember_019c4274-2cde-7ada-bce9-68841a0c28d8_default" xlink:href="viv-20251231.xsd#viv_IfrsArrangementsAndNonarrangementTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_IfrsTypeOfArrangementAxis_019c4274-2cde-7ada-bce9-68841a0c28d8" xlink:to="loc_viv_IfrsArrangementsAndNonarrangementTransactionsMember_019c4274-2cde-7ada-bce9-68841a0c28d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsArrangementsAndNonarrangementTransactionsMember_019c4274-2cde-7849-82d3-5fd366e14170" xlink:href="viv-20251231.xsd#viv_IfrsArrangementsAndNonarrangementTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_IfrsTypeOfArrangementAxis_019c4274-2cde-7ada-bce9-68841a0c28d8" xlink:to="loc_viv_IfrsArrangementsAndNonarrangementTransactionsMember_019c4274-2cde-7849-82d3-5fd366e14170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TermOfConductAdjustmentSignedWithAnatelMember_019c4274-2cde-70b3-8659-a7e0e59f5317" xlink:href="viv-20251231.xsd#viv_TermOfConductAdjustmentSignedWithAnatelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsArrangementsAndNonarrangementTransactionsMember_019c4274-2cde-7849-82d3-5fd366e14170" xlink:to="loc_viv_TermOfConductAdjustmentSignedWithAnatelMember_019c4274-2cde-70b3-8659-a7e0e59f5317" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c4274-2cde-713c-aa0f-eaa0e53af53a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:to="loc_ifrs-full_RangeAxis_019c4274-2cde-713c-aa0f-eaa0e53af53a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2cde-713c-aa0f-eaa0e53af53a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2cde-713c-aa0f-eaa0e53af53a" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2cde-713c-aa0f-eaa0e53af53a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2cde-72c5-87cb-d305c68f628b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2cde-713c-aa0f-eaa0e53af53a" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2cde-72c5-87cb-d305c68f628b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c4274-2cde-7c45-a78a-4e36436d949b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2cde-72c5-87cb-d305c68f628b" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c4274-2cde-7c45-a78a-4e36436d949b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypesOfLegalProceedingsAxis_019c4274-2cde-736f-b9a3-61b76f80ef83" xlink:href="viv-20251231.xsd#viv_TypesOfLegalProceedingsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_019c4274-2cde-7748-a927-b9fd8a8b5a81" xlink:to="loc_viv_TypesOfLegalProceedingsAxis_019c4274-2cde-736f-b9a3-61b76f80ef83" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LegalProceedingsMember_019c4274-2cde-736f-b9a3-61b76f80ef83_default" xlink:href="viv-20251231.xsd#viv_LegalProceedingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypesOfLegalProceedingsAxis_019c4274-2cde-736f-b9a3-61b76f80ef83" xlink:to="loc_viv_LegalProceedingsMember_019c4274-2cde-736f-b9a3-61b76f80ef83_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:href="viv-20251231.xsd#viv_LegalProceedingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypesOfLegalProceedingsAxis_019c4274-2cde-736f-b9a3-61b76f80ef83" xlink:to="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_QuotasCalculatedOnCommunityTelephonePlansAndExpansionPlansMember_019c4274-2cde-7710-9b9b-0c5c42a62108" xlink:href="viv-20251231.xsd#viv_QuotasCalculatedOnCommunityTelephonePlansAndExpansionPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:to="loc_viv_QuotasCalculatedOnCommunityTelephonePlansAndExpansionPlansMember_019c4274-2cde-7710-9b9b-0c5c42a62108" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FailureToProvideServicesAndProductsSoldMember_019c4274-2cde-76d3-bb23-d072390f6e80" xlink:href="viv-20251231.xsd#viv_FailureToProvideServicesAndProductsSoldMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:to="loc_viv_FailureToProvideServicesAndProductsSoldMember_019c4274-2cde-76d3-bb23-d072390f6e80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CollectiveConsumeristAndNonConsumeristNatureMember_019c4274-2cde-755f-a279-bf7ff6faae42" xlink:href="viv-20251231.xsd#viv_CollectiveConsumeristAndNonConsumeristNatureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:to="loc_viv_CollectiveConsumeristAndNonConsumeristNatureMember_019c4274-2cde-755f-a279-bf7ff6faae42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RegulatoryAmnestyMember_019c582a-cfee-7e8f-aa2a-598e1daea4de" xlink:href="viv-20251231.xsd#viv_RegulatoryAmnestyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LegalProceedingsMember_019c4274-2cde-7200-aca6-d9ff6af76950" xlink:to="loc_viv_RegulatoryAmnestyMember_019c582a-cfee-7e8f-aa2a-598e1daea4de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForProbableLosses_019c4274-2cde-7632-a614-01cefb0d6a7d" xlink:href="viv-20251231.xsd#viv_OtherProvisionForProbableLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForProbableLosses_019c4274-2cde-7632-a614-01cefb0d6a7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForProbableLossesOfFederalTax_019c4274-2cde-7657-b7b6-e9a321bca4ec" xlink:href="viv-20251231.xsd#viv_OtherProvisionForProbableLossesOfFederalTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForProbableLossesOfFederalTax_019c4274-2cde-7657-b7b6-e9a321bca4ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForProbableLossesOfStateTax_019c4274-2cde-7480-835e-5bd1433c59bb" xlink:href="viv-20251231.xsd#viv_OtherProvisionForProbableLossesOfStateTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForProbableLossesOfStateTax_019c4274-2cde-7480-835e-5bd1433c59bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForProbableLossesOfMunicipalTax_019c4274-2cde-7018-8739-0cee1b7b2d90" xlink:href="viv-20251231.xsd#viv_OtherProvisionForProbableLossesOfMunicipalTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForProbableLossesOfMunicipalTax_019c4274-2cde-7018-8739-0cee1b7b2d90" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForProbableLossesOfOtherTaxProceedings_019c4274-2cde-7ec3-802d-069365dd43d9" xlink:href="viv-20251231.xsd#viv_OtherProvisionForProbableLossesOfOtherTaxProceedings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForProbableLossesOfOtherTaxProceedings_019c4274-2cde-7ec3-802d-069365dd43d9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLosses_019c4274-2cde-7be9-a8f4-2a12689968b5" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLosses_019c4274-2cde-7be9-a8f4-2a12689968b5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfFederalTax_019c4274-2cde-7dae-8f5f-fbe25f2a56e0" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfFederalTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfFederalTax_019c4274-2cde-7dae-8f5f-fbe25f2a56e0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfStateTax_019c4274-2cde-7b24-bc07-a638f1872749" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfStateTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfStateTax_019c4274-2cde-7b24-bc07-a638f1872749" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfMunicipalTax_019c4274-2cde-7899-9a80-821a7caf67e4" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfMunicipalTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfMunicipalTax_019c4274-2cde-7899-9a80-821a7caf67e4" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfOtherTaxProceedings_019c4274-2cde-798f-b35d-e927380c2f8b" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfOtherTaxProceedings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfOtherTaxProceedings_019c4274-2cde-798f-b35d-e927380c2f8b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProbableLossesProvisions_019c4274-2cde-712a-97c5-4fa238c5395e" xlink:href="viv-20251231.xsd#viv_ProbableLossesProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_ProbableLossesProvisions_019c4274-2cde-712a-97c5-4fa238c5395e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PossibleLossesProvisions_019c4274-2cde-7d33-948e-175019c5157c" xlink:href="viv-20251231.xsd#viv_PossibleLossesProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_PossibleLossesProvisions_019c4274-2cde-7d33-948e-175019c5157c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfImportDuty_019c4274-2cde-7526-85fb-26f77d0c2c1f" xlink:href="viv-20251231.xsd#viv_PercentageOfImportDuty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_PercentageOfImportDuty_019c4274-2cde-7526-85fb-26f77d0c2c1f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreasedImportDutyPercentage_019c4274-2cde-7b03-979f-a154497044a8" xlink:href="viv-20251231.xsd#viv_IncreasedImportDutyPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_IncreasedImportDutyPercentage_019c4274-2cde-7b03-979f-a154497044a8" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderUniversalTelecommunicationsServicesFund_019c4274-2cde-736b-adbc-4af492fc8603" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfAnatelUnderUniversalTelecommunicationsServicesFund"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderUniversalTelecommunicationsServicesFund_019c4274-2cde-736b-adbc-4af492fc8603" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderFundForTechnologicalDevelopmentOfTelecommunications_019c4274-2cde-70cd-91fb-637aaf8d0295" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfAnatelUnderFundForTechnologicalDevelopmentOfTelecommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderFundForTechnologicalDevelopmentOfTelecommunications_019c4274-2cde-70cd-91fb-637aaf8d0295" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderTelecommunicationsInspectionFund_019c4274-2cde-787b-bfc5-4625115ac114" xlink:href="viv-20251231.xsd#viv_OtherProvisionForPossibleLossesOfAnatelUnderTelecommunicationsInspectionFund"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_OtherProvisionForPossibleLossesOfAnatelUnderTelecommunicationsInspectionFund_019c4274-2cde-787b-bfc5-4625115ac114" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DiscountRelatedToRenegociations_019c5827-c8de-7100-9bfa-7ee39ef7b6a0" xlink:href="viv-20251231.xsd#viv_DiscountRelatedToRenegociations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_DiscountRelatedToRenegociations_019c5827-c8de-7100-9bfa-7ee39ef7b6a0" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentOfPersonalServiceMovableLoss_019c4274-2cde-7372-84d9-18040767a973" xlink:href="viv-20251231.xsd#viv_PaymentOfPersonalServiceMovableLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_PaymentOfPersonalServiceMovableLoss_019c4274-2cde-7372-84d9-18040767a973" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FineImposedOnEntityInAdministrativeAndJudicialProceedingsLawsuit_019c4274-2cde-7202-bbdc-d24bce769c0b" xlink:href="viv-20251231.xsd#viv_FineImposedOnEntityInAdministrativeAndJudicialProceedingsLawsuit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_FineImposedOnEntityInAdministrativeAndJudicialProceedingsLawsuit_019c4274-2cde-7202-bbdc-d24bce769c0b" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestAndCorrectionAmountInAdministrativeAndJudicialProceedingsLawsuit_019c4274-2cde-7111-ab80-1befb03415a4" xlink:href="viv-20251231.xsd#viv_InterestAndCorrectionAmountInAdministrativeAndJudicialProceedingsLawsuit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_InterestAndCorrectionAmountInAdministrativeAndJudicialProceedingsLawsuit_019c4274-2cde-7111-ab80-1befb03415a4" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans_019c4274-2cde-7a39-9bec-10f84407b6fb" xlink:href="viv-20251231.xsd#viv_ConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_ConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans_019c4274-2cde-7a39-9bec-10f84407b6fb" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseOfValueOnConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans_019c4274-2cde-75c8-8bdf-78a992188c95" xlink:href="viv-20251231.xsd#viv_IncreaseOfValueOnConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_IncreaseOfValueOnConstructionOfHighCapacityBackhaulInfrastructureForAlternativePlans_019c4274-2cde-75c8-8bdf-78a992188c95" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FineImposedOnCoverageTargetsInProcedureForDeterminationOfNoncomplianceWithObligations_019c4274-2cde-77e1-ab6a-17229342a309" xlink:href="viv-20251231.xsd#viv_FineImposedOnCoverageTargetsInProcedureForDeterminationOfNoncomplianceWithObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_FineImposedOnCoverageTargetsInProcedureForDeterminationOfNoncomplianceWithObligations_019c4274-2cde-77e1-ab6a-17229342a309" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LocationsThatReceivedInvestmentInANewTypeOfTechnology_019c4274-2cde-7e83-9bb4-653347f80c39" xlink:href="viv-20251231.xsd#viv_LocationsThatReceivedInvestmentInANewTypeOfTechnology"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_LocationsThatReceivedInvestmentInANewTypeOfTechnology_019c4274-2cde-7e83-9bb4-653347f80c39" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToFailureToSupplyServicesAndOrProductsSold_019c4274-2cde-78a9-94b0-dfc406d4be42" xlink:href="viv-20251231.xsd#viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToFailureToSupplyServicesAndOrProductsSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToFailureToSupplyServicesAndOrProductsSold_019c4274-2cde-78a9-94b0-dfc406d4be42" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToCivilProceedingsOfNonConsumerNatureAllArisingInOrdinaryCourseOfBusiness_019c4274-2cde-7c88-9d07-8e3c4459edae" xlink:href="viv-20251231.xsd#viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToCivilProceedingsOfNonConsumerNatureAllArisingInOrdinaryCourseOfBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_ProvisionsForCivilContingenciesAssessedAsProbableLossesRelatingToCivilProceedingsOfNonConsumerNatureAllArisingInOrdinaryCourseOfBusiness_019c4274-2cde-7c88-9d07-8e3c4459edae" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DailyFineInCaseOfNoncompliance_019c4274-2cde-7bc7-96b5-97ff9383e9c1" xlink:href="viv-20251231.xsd#viv_DailyFineInCaseOfNoncompliance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_DailyFineInCaseOfNoncompliance_019c4274-2cde-7bc7-96b5-97ff9383e9c1" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinesUnderClarificationEmbargoes_019c4274-2cde-72d6-bba6-389581adb0e4" xlink:href="viv-20251231.xsd#viv_FinesUnderClarificationEmbargoes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_FinesUnderClarificationEmbargoes_019c4274-2cde-72d6-bba6-389581adb0e4" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfChargeOnInterconnectionServices_019c4274-2cde-7ec2-8b82-cf6bc8b48f91" xlink:href="viv-20251231.xsd#viv_PercentageOfChargeOnInterconnectionServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_019c4274-2cde-7d2c-8cae-da3de5b30a81" xlink:to="loc_viv_PercentageOfChargeOnInterconnectionServices_019c4274-2cde-7ec2-8b82-cf6bc8b48f91" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfChargeOnInterconnectionServices_019c4274-2cde-750c-94f3-6ac43d14aae2" xlink:href="viv-20251231.xsd#viv_PercentageOfChargeOnInterconnectionServices"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-751c-9e5f-e2a8c55b68f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-751c-9e5f-e2a8c55b68f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-751c-9e5f-e2a8c55b68f1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-751c-9e5f-e2a8c55b68f1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-751c-9e5f-e2a8c55b68f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-751c-9e5f-e2a8c55b68f1" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-7db4-acb6-a7ae046826e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-7db4-acb6-a7ae046826e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebentureBorrowingsMember_019c4274-2cdf-785a-b43e-7d0936209c8c" xlink:href="viv-20251231.xsd#viv_DebentureBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_DebentureBorrowingsMember_019c4274-2cdf-785a-b43e-7d0936209c8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A5GLicencesMember_019c4274-2cdf-7e4a-b391-bedbf77fa238" xlink:href="viv-20251231.xsd#viv_A5GLicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:to="loc_viv_A5GLicencesMember_019c4274-2cdf-7e4a-b391-bedbf77fa238" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c4274-2cdf-7127-8dae-95020a656fd8" xlink:href="viv-20251231.xsd#viv_TaxRefinancingAndAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:to="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c4274-2cdf-7127-8dae-95020a656fd8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingFinancialInstitutionsMember_019c4274-2cdf-720c-9a05-a0a2e594289e" xlink:href="viv-20251231.xsd#viv_FinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:to="loc_viv_FinancingFinancialInstitutionsMember_019c4274-2cdf-720c-9a05-a0a2e594289e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoanAndFinancingOtherMember_019c4274-2cdf-7300-af9a-ad8c0abbd33a" xlink:href="viv-20251231.xsd#viv_LoanAndFinancingOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7ca5-a57d-3057f2704cd9" xlink:to="loc_viv_LoanAndFinancingOtherMember_019c4274-2cdf-7300-af9a-ad8c0abbd33a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialInstitutionLawNo4131Member_019c4274-2cdf-7f55-834b-9fe3bd6d9931" xlink:href="viv-20251231.xsd#viv_FinancialInstitutionLawNo4131Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_FinancialInstitutionLawNo4131Member_019c4274-2cdf-7f55-834b-9fe3bd6d9931" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceWithSuppliersMember_019c4274-2cdf-76a2-947a-f801e4b844e0" xlink:href="viv-20251231.xsd#viv_FinanceWithSuppliersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_FinanceWithSuppliersMember_019c4274-2cdf-76a2-947a-f801e4b844e0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DesenrolaProgramMember_019c71a9-2339-7ccc-9d78-26b463754d3e" xlink:href="viv-20251231.xsd#viv_DesenrolaProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_DesenrolaProgramMember_019c71a9-2339-7ccc-9d78-26b463754d3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContingentConsiderationMember_019c4274-2cdf-70ce-baff-5fe40fafa75d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_ifrs-full_ContingentConsiderationMember_019c4274-2cdf-70ce-baff-5fe40fafa75d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCreditorsMember_019c4274-2cdf-7366-9f76-2d2e68545194" xlink:href="viv-20251231.xsd#viv_OtherCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7d91-9ba2-666bdd1efac5" xlink:to="loc_viv_OtherCreditorsMember_019c4274-2cdf-7366-9f76-2d2e68545194" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7193-6660-74c1-be71-d10e7db70629" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7193-6660-74c1-be71-d10e7db70629" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7193-6660-74c1-be71-d10e7db70629_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7193-6660-74c1-be71-d10e7db70629" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7193-6660-74c1-be71-d10e7db70629_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7193-8e25-7ac5-838e-84b54ad53f13" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7193-6660-74c1-be71-d10e7db70629" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7193-8e25-7ac5-838e-84b54ad53f13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c7193-a8d4-798b-908c-f3870b324885" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7193-8e25-7ac5-838e-84b54ad53f13" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c7193-a8d4-798b-908c-f3870b324885" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c7194-ed94-739f-b3e1-471a59766d17" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7193-8e25-7ac5-838e-84b54ad53f13" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c7194-ed94-739f-b3e1-471a59766d17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c4274-2cdf-7969-96d8-a5f75f9bd0e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c4274-2cdf-7969-96d8-a5f75f9bd0e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c4274-2cdf-7969-96d8-a5f75f9bd0e6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c4274-2cdf-7969-96d8-a5f75f9bd0e6" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c4274-2cdf-7969-96d8-a5f75f9bd0e6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c4274-2cdf-72be-b26e-cc6e0405faa0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c4274-2cdf-7969-96d8-a5f75f9bd0e6" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c4274-2cdf-72be-b26e-cc6e0405faa0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesRelatedToBusinessCombinationMember_019c4274-2cdf-7689-8290-42c29144b127" xlink:href="viv-20251231.xsd#viv_LiabilitiesRelatedToBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c4274-2cdf-72be-b26e-cc6e0405faa0" xlink:to="loc_viv_LiabilitiesRelatedToBusinessCombinationMember_019c4274-2cdf-7689-8290-42c29144b127" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019c4274-2cdf-72d1-8074-1b40d88c1eed" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7866-94e7-78bc448c94eb" xlink:to="loc_srt_CurrencyAxis_019c4274-2cdf-72d1-8074-1b40d88c1eed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2cdf-72d1-8074-1b40d88c1eed_default" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019c4274-2cdf-72d1-8074-1b40d88c1eed" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2cdf-72d1-8074-1b40d88c1eed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2cdf-783a-9cbb-eaa3e5b6c18a" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019c4274-2cdf-72d1-8074-1b40d88c1eed" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2cdf-783a-9cbb-eaa3e5b6c18a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_BRL_019c4274-2cdf-726b-89a1-ca802e70c131" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_BRL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2cdf-783a-9cbb-eaa3e5b6c18a" xlink:to="loc_currency_BRL_019c4274-2cdf-726b-89a1-ca802e70c131" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencyMember_019c4274-2cdf-7e6d-9808-19d969557d1b" xlink:href="viv-20251231.xsd#viv_ForeignCurrencyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2cdf-783a-9cbb-eaa3e5b6c18a" xlink:to="loc_viv_ForeignCurrencyMember_019c4274-2cdf-7e6d-9808-19d969557d1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil_019c7196-85fb-740d-9602-5dc377798850" xlink:href="viv-20251231.xsd#viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil_019c7196-85fb-740d-9602-5dc377798850" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MonthlyInterestRate_019c71ab-dd4f-7da9-92b7-82b4879c82ae" xlink:href="viv-20251231.xsd#viv_MonthlyInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_viv_MonthlyInterestRate_019c71ab-dd4f-7da9-92b7-82b4879c82ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingCurrent_019c4274-2cdf-7a55-9fe3-cd8715d7bcb7" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_viv_LoansAndFinancingCurrent_019c4274-2cdf-7a55-9fe3-cd8715d7bcb7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingNonCurrent_019c4274-2cdf-7bd3-86d0-836c089f0fae" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_viv_LoansAndFinancingNonCurrent_019c4274-2cdf-7bd3-86d0-836c089f0fae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancing_019c4274-2cdf-7ecb-a6ba-e7d48729bf9f" xlink:href="viv-20251231.xsd#viv_LoansAndFinancing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-7226-9d18-02633cef8826" xlink:to="loc_viv_LoansAndFinancing_019c4274-2cdf-7ecb-a6ba-e7d48729bf9f" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-792b-9921-34ad2b9a525e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-792b-9921-34ad2b9a525e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2cdf-7a2f-8eea-c84671b857ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-792b-9921-34ad2b9a525e" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2cdf-7a2f-8eea-c84671b857ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2cdf-7a2f-8eea-c84671b857ec_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2cdf-7a2f-8eea-c84671b857ec" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2cdf-7a2f-8eea-c84671b857ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2cdf-7e8d-b24f-b50a94432670" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2cdf-7a2f-8eea-c84671b857ec" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2cdf-7e8d-b24f-b50a94432670" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalTechnologyMember_019c4274-2cdf-7d31-8e44-3a3181830089" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2cdf-7e8d-b24f-b50a94432670" xlink:to="loc_viv_TelefonicaGlobalTechnologyMember_019c4274-2cdf-7d31-8e44-3a3181830089" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-7055-b6cf-431c972469cb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-792b-9921-34ad2b9a525e" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-7055-b6cf-431c972469cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7055-b6cf-431c972469cb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-7055-b6cf-431c972469cb" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7055-b6cf-431c972469cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7f09-b51b-c867e9e00736" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-7055-b6cf-431c972469cb" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7f09-b51b-c867e9e00736" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-746b-b03f-2ac9642843d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7f09-b51b-c867e9e00736" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-746b-b03f-2ac9642843d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencyDenominatedLoanObtainedFromCitibankUsDollarThroughLawNo.4.131Member_019c4274-2cdf-72f1-bd7e-e0d26a8f0387" xlink:href="viv-20251231.xsd#viv_ForeignCurrencyDenominatedLoanObtainedFromCitibankUsDollarThroughLawNo.4.131Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7f09-b51b-c867e9e00736" xlink:to="loc_viv_ForeignCurrencyDenominatedLoanObtainedFromCitibankUsDollarThroughLawNo.4.131Member_019c4274-2cdf-72f1-bd7e-e0d26a8f0387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConvertibleNoteAgreementMember_019c4274-2cdf-7d46-95b5-095ac11262b5" xlink:href="viv-20251231.xsd#viv_ConvertibleNoteAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7f09-b51b-c867e9e00736" xlink:to="loc_viv_ConvertibleNoteAgreementMember_019c4274-2cdf-7d46-95b5-095ac11262b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesAxis_019c4274-2cdf-762b-be6a-e88e1b72fa7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-792b-9921-34ad2b9a525e" xlink:to="loc_ifrs-full_JointVenturesAxis_019c4274-2cdf-762b-be6a-e88e1b72fa7d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cdf-762b-be6a-e88e1b72fa7d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cdf-762b-be6a-e88e1b72fa7d" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cdf-762b-be6a-e88e1b72fa7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c4274-2cdf-7b3a-b951-c5ce7b1a341b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_JointVenturesAxis_019c4274-2cdf-762b-be6a-e88e1b72fa7d" xlink:to="loc_ifrs-full_JointVenturesDomain_019c4274-2cdf-7b3a-b951-c5ce7b1a341b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoVenturesMember_019c4274-2cdf-716a-80e1-a15376240afc" xlink:href="viv-20251231.xsd#viv_VivoVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c4274-2cdf-7b3a-b951-c5ce7b1a341b" xlink:to="loc_viv_VivoVenturesMember_019c4274-2cdf-716a-80e1-a15376240afc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes_019c4274-2cdf-79f1-9854-f7db0d73e8c1" xlink:href="viv-20251231.xsd#viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes_019c4274-2cdf-79f1-9854-f7db0d73e8c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceLeaseWeightedAnnualInterestRate_019c4274-2cdf-7899-ab28-264aa153ceee" xlink:href="viv-20251231.xsd#viv_FinanceLeaseWeightedAnnualInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_FinanceLeaseWeightedAnnualInterestRate_019c4274-2cdf-7899-ab28-264aa153ceee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceLeaseAverageMaturityPeriod_019c4274-2cdf-70cc-a1cf-2344ebb09be1" xlink:href="viv-20251231.xsd#viv_FinanceLeaseAverageMaturityPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_FinanceLeaseAverageMaturityPeriod_019c4274-2cdf-70cc-a1cf-2344ebb09be1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MinimumFinanceLeasePaymentsPayables_019c4274-2cdf-7b56-b963-0aea68639f98" xlink:href="viv-20251231.xsd#viv_MinimumFinanceLeasePaymentsPayables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_MinimumFinanceLeasePaymentsPayables_019c4274-2cdf-7b56-b963-0aea68639f98" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FutureFinanceChargeOnFinanceLease_019c4274-2cdf-71a6-b9d3-01162a2732db" xlink:href="viv-20251231.xsd#viv_FutureFinanceChargeOnFinanceLease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_FutureFinanceChargeOnFinanceLease_019c4274-2cdf-71a6-b9d3-01162a2732db" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MinimumFinanceLeasePaymentsPayableAtPresentValues_019c4274-2cdf-7f64-84f3-c109e0bb912b" xlink:href="viv-20251231.xsd#viv_MinimumFinanceLeasePaymentsPayableAtPresentValues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_MinimumFinanceLeasePaymentsPayableAtPresentValues_019c4274-2cdf-7f64-84f3-c109e0bb912b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingCurrent_019c4274-2cdf-7b62-bb9d-3a5fdbae732b" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_LoansAndFinancingCurrent_019c4274-2cdf-7b62-bb9d-3a5fdbae732b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingNonCurrent_019c4274-2cdf-779c-877a-eebbf8f81335" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_LoansAndFinancingNonCurrent_019c4274-2cdf-779c-877a-eebbf8f81335" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReimbursementPeriod_019c4274-2cdf-7e22-b842-dae91d7b8c7d" xlink:href="viv-20251231.xsd#viv_ReimbursementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_ReimbursementPeriod_019c4274-2cdf-7e22-b842-dae91d7b8c7d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c4274-2cdf-7be6-aae3-6d925018c745" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_ifrs-full_Borrowings_019c4274-2cdf-7be6-aae3-6d925018c745" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate_019c4274-2cdf-7142-94c7-7878fa529007" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_ifrs-full_BorrowingsInterestRate_019c4274-2cdf-7142-94c7-7878fa529007" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_019c4274-2cdf-76f2-85a4-d6b286469852" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_019c4274-2cdf-76f2-85a4-d6b286469852" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c4274-2cdf-7ee2-862b-a6996aa5cfed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_ifrs-full_NotionalAmount_019c4274-2cdf-7ee2-862b-a6996aa5cfed" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReferenceInterestRateSELIC_019c4274-2cdf-75c4-afdd-decf476df55e" xlink:href="viv-20251231.xsd#viv_ReferenceInterestRateSELIC"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_ReferenceInterestRateSELIC_019c4274-2cdf-75c4-afdd-decf476df55e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VariationInTheGeneralPriceIndexIGPDI_019c4274-2cdf-76ca-a628-2328dc740b23" xlink:href="viv-20251231.xsd#viv_VariationInTheGeneralPriceIndexIGPDI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-752c-8383-2efa2db0872c" xlink:to="loc_viv_VariationInTheGeneralPriceIndexIGPDI_019c4274-2cdf-76ca-a628-2328dc740b23" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-72c5-8b07-67aa37021c4b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7712-8b6f-655fd13d0961" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-72c5-8b07-67aa37021c4b" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7712-8b6f-655fd13d0961" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7712-8b6f-655fd13d0961" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2cdf-7db7-9cd3-0a43b7b76d3c" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2cdf-7fd8-84ac-92564f768660" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2cdf-7fd8-84ac-92564f768660" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2cdf-78b0-bdc1-1c8bbdd08a20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2cdf-78b0-bdc1-1c8bbdd08a20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2cdf-7819-92b8-67c683948461" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2cdf-7819-92b8-67c683948461" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2cdf-75b3-a9bc-d44365c68081" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2cdf-75b3-a9bc-d44365c68081" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2cdf-702d-b1d8-4d9796f53a3b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7593-bd45-b84e1657827d" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2cdf-702d-b1d8-4d9796f53a3b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-766d-82a6-f7b43895685e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2cdf-7712-8b6f-655fd13d0961" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-766d-82a6-f7b43895685e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-766d-82a6-f7b43895685e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-766d-82a6-f7b43895685e" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-766d-82a6-f7b43895685e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2cdf-766d-82a6-f7b43895685e" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7325-b972-7954f6dab151" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2cdf-7325-b972-7954f6dab151" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-7c43-b860-c0d5867efe7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2cdf-7c43-b860-c0d5867efe7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebentureBorrowingsMember_019c4274-2cdf-7ffe-b455-a9f66ab36e93" xlink:href="viv-20251231.xsd#viv_DebentureBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_DebentureBorrowingsMember_019c4274-2cdf-7ffe-b455-a9f66ab36e93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FiveGLicensesMember_019c4274-2cdf-760d-b63b-0a57c75cb8c4" xlink:href="viv-20251231.xsd#viv_FiveGLicensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_FiveGLicensesMember_019c4274-2cdf-760d-b63b-0a57c75cb8c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cdf-7e9f-9cbd-365d5fe34e61" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c4274-2cdf-7e9f-9cbd-365d5fe34e61" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RefinancingAndAmnestyProgramMember_019c4274-2cdf-7c6d-89b6-e09109cae446" xlink:href="viv-20251231.xsd#viv_RefinancingAndAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_RefinancingAndAmnestyProgramMember_019c4274-2cdf-7c6d-89b6-e09109cae446" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialInstitutionsMember_019c4274-2cdf-767c-9e6a-b2a71cdbfcb2" xlink:href="viv-20251231.xsd#viv_FinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_FinancialInstitutionsMember_019c4274-2cdf-767c-9e6a-b2a71cdbfcb2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCreditorsMember_019c4274-2cdf-718b-a4ba-f6aca7f45ea9" xlink:href="viv-20251231.xsd#viv_OtherCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2cdf-7370-9460-b729038985fb" xlink:to="loc_viv_OtherCreditorsMember_019c4274-2cdf-718b-a4ba-f6aca7f45ea9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NoncurrentBorrowingsUndiscountedCashFlows_019c4274-2cdf-7b08-b865-a9a5ce2e78d3" xlink:href="viv-20251231.xsd#viv_NoncurrentBorrowingsUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2cdf-72c5-8b07-67aa37021c4b" xlink:to="loc_viv_NoncurrentBorrowingsUndiscountedCashFlows_019c4274-2cdf-7b08-b865-a9a5ce2e78d3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails4" xlink:type="simple" xlink:href="viv-20251231.xsd#LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7292-dad4-791a-969e-2b0a33d5a688" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7292-dad4-791a-969e-2b0a33d5a688" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c7293-b194-73b7-948d-c27ac6d57aa8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7292-dad4-791a-969e-2b0a33d5a688" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c7293-b194-73b7-948d-c27ac6d57aa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-73b7-948d-c27ac6d57aa8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c7293-b194-73b7-948d-c27ac6d57aa8" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-73b7-948d-c27ac6d57aa8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c7293-b194-73b7-948d-c27ac6d57aa8" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c7293-b194-718c-aec7-9001655249ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c7293-b194-718c-aec7-9001655249ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebentureBorrowingsMember_019c7293-b194-7ae1-92bb-9fe37e58327e" xlink:href="viv-20251231.xsd#viv_DebentureBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_viv_DebentureBorrowingsMember_019c7293-b194-7ae1-92bb-9fe37e58327e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FiveGLicensesMember_019c7293-b194-759f-9a5b-f9f786e8fadb" xlink:href="viv-20251231.xsd#viv_FiveGLicensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_viv_FiveGLicensesMember_019c7293-b194-759f-9a5b-f9f786e8fadb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialInstitutionLawNo4131Member_019c7293-b194-703f-a67a-2845014937bb" xlink:href="viv-20251231.xsd#viv_FinancialInstitutionLawNo4131Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_viv_FinancialInstitutionLawNo4131Member_019c7293-b194-703f-a67a-2845014937bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContingentConsiderationMember_019c7293-b194-7fb4-b585-893c31c8072c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContingentConsiderationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_ifrs-full_ContingentConsiderationMember_019c7293-b194-7fb4-b585-893c31c8072c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RefinancingAndAmnestyProgramMember_019c7293-b194-7957-9c3b-3ca11a1af9fb" xlink:href="viv-20251231.xsd#viv_RefinancingAndAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_viv_RefinancingAndAmnestyProgramMember_019c7293-b194-7957-9c3b-3ca11a1af9fb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCreditorsMember_019c7293-b194-7a6d-8dc2-a0356cd264b2" xlink:href="viv-20251231.xsd#viv_OtherCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7293-b194-780a-99a7-b009440c7d36" xlink:to="loc_viv_OtherCreditorsMember_019c7293-b194-7a6d-8dc2-a0356cd264b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c7293-b194-74b7-b087-922c47ee95e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7292-dad4-791a-969e-2b0a33d5a688" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c7293-b194-74b7-b087-922c47ee95e4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-74b7-b087-922c47ee95e4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7293-b194-74b7-b087-922c47ee95e4" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-74b7-b087-922c47ee95e4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c7293-b194-74b7-b087-922c47ee95e4" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c7293-b194-74fd-b819-9acb05db7ca0" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c7293-b194-74fd-b819-9acb05db7ca0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c7293-b194-79eb-b261-c0064d8c63f7" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c7293-b194-79eb-b261-c0064d8c63f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationFiBrasilMember_019c7293-b194-7db0-8f16-a81151ce6a6e" xlink:href="viv-20251231.xsd#viv_BusinessCombinationFiBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:to="loc_viv_BusinessCombinationFiBrasilMember_019c7293-b194-7db0-8f16-a81151ce6a6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationCyberMember_019c7293-b194-794a-9e5e-57e48e33d5bf" xlink:href="viv-20251231.xsd#viv_BusinessCombinationCyberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c7293-b194-7ed3-a554-3af8bde67d43" xlink:to="loc_viv_BusinessCombinationCyberMember_019c7293-b194-794a-9e5e-57e48e33d5bf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c7293-b194-701c-8dc3-24284551faf9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_ifrs-full_Borrowings_019c7293-b194-701c-8dc3-24284551faf9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ChangesInBorrowings_019c7293-b194-70d7-ba4e-3181bc5c76f3" xlink:href="viv-20251231.xsd#viv_ChangesInBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_ChangesInBorrowings_019c7293-b194-70d7-ba4e-3181bc5c76f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ChangesInBorrowingsExcludingCashAndCashEquivalents_019c7293-b194-7a86-99fa-cecf22913ac8" xlink:href="viv-20251231.xsd#viv_ChangesInBorrowingsExcludingCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_ChangesInBorrowingsExcludingCashAndCashEquivalents_019c7293-b194-7a86-99fa-cecf22913ac8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignExchangeVariationOnBorrowings_019c7293-b194-7f0b-bcd5-39df9c20f12f" xlink:href="viv-20251231.xsd#viv_ForeignExchangeVariationOnBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_ForeignExchangeVariationOnBorrowings_019c7293-b194-7f0b-bcd5-39df9c20f12f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRevenueExpense_019c7293-b194-75bd-9ba7-37bbb4abc25a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRevenueExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_ifrs-full_InterestRevenueExpense_019c7293-b194-75bd-9ba7-37bbb4abc25a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseInBorrowingsRelatedToBusinessCombination_019c7293-b194-7357-8206-dfe6afeb397f" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseInBorrowingsRelatedToBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_IncreaseDecreaseInBorrowingsRelatedToBusinessCombination_019c7293-b194-7357-8206-dfe6afeb397f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BorrowingsCancellationOfContractsAndOtherWriteOffs_019c7293-b194-7b41-aba7-73884ca514ab" xlink:href="viv-20251231.xsd#viv_BorrowingsCancellationOfContractsAndOtherWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_BorrowingsCancellationOfContractsAndOtherWriteOffs_019c7293-b194-7b41-aba7-73884ca514ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BorrowingsRepaymentsOfPrincipalWriteOffs_019c7293-b194-7428-a23d-1c2b87c6b924" xlink:href="viv-20251231.xsd#viv_BorrowingsRepaymentsOfPrincipalWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_BorrowingsRepaymentsOfPrincipalWriteOffs_019c7293-b194-7428-a23d-1c2b87c6b924" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BorrowingsRepaymentsOfFinancialChargesWriteOffs_019c7293-b194-73f9-b180-63e587de4739" xlink:href="viv-20251231.xsd#viv_BorrowingsRepaymentsOfFinancialChargesWriteOffs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_BorrowingsRepaymentsOfFinancialChargesWriteOffs_019c7293-b194-73f9-b180-63e587de4739" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherChangesInBorrowings_019c7293-b194-7891-9b4e-0efcd8b28240" xlink:href="viv-20251231.xsd#viv_OtherChangesInBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_OtherChangesInBorrowings_019c7293-b194-7891-9b4e-0efcd8b28240" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SettlementByOffsettingJudicialDeposit_019c7293-b194-742e-962f-7228027fc828" xlink:href="viv-20251231.xsd#viv_SettlementByOffsettingJudicialDeposit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7293-b194-7c5d-8657-e3087442b621" xlink:to="loc_viv_SettlementByOffsettingJudicialDeposit_019c7293-b194-742e-962f-7228027fc828" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails5" xlink:type="simple" xlink:href="viv-20251231.xsd#LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails5"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/LOANSFINANCINGDEBENTURESLEASE5GLICENSESANDLIABILITIESFORTHEACQUISITIONOFACOMPANYDetails5" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c7298-c042-72d7-a639-2cde998498b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c7298-c042-72d7-a639-2cde998498b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-72d7-a639-2cde998498b0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c7298-c042-72d7-a639-2cde998498b0" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-72d7-a639-2cde998498b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c7298-c042-72d7-a639-2cde998498b0" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonPrivilegedSeriesPublicUnsecuredNonconvertibleDebenturesMember_019c7298-c042-78d1-8e0f-50a174f1e7fc" xlink:href="viv-20251231.xsd#viv_NonPrivilegedSeriesPublicUnsecuredNonconvertibleDebenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_NonPrivilegedSeriesPublicUnsecuredNonconvertibleDebenturesMember_019c7298-c042-78d1-8e0f-50a174f1e7fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonPrivileged1SeriePublicUnsecuredNonconvertibleDebenturesMember_019c7299-8253-7369-9b59-71508404b89e" xlink:href="viv-20251231.xsd#viv_NonPrivileged1SeriePublicUnsecuredNonconvertibleDebenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_NonPrivileged1SeriePublicUnsecuredNonconvertibleDebenturesMember_019c7299-8253-7369-9b59-71508404b89e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonPrivileged2SeriesPublicUnsecuredNonconvertibleDebenturesMember_019c729a-2289-7440-8d85-45624dbad248" xlink:href="viv-20251231.xsd#viv_NonPrivileged2SeriesPublicUnsecuredNonconvertibleDebenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_NonPrivileged2SeriesPublicUnsecuredNonconvertibleDebenturesMember_019c729a-2289-7440-8d85-45624dbad248" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c729d-442e-78a3-ad76-0a31ebd4c202" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c729d-442e-78a3-ad76-0a31ebd4c202" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c72a0-f69b-7562-93b2-96a03e9211cf" xlink:href="viv-20251231.xsd#viv_TaxRefinancingAndAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c72a0-f69b-7562-93b2-96a03e9211cf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingFinancialInstitutionsMember_019c72a3-57c4-7ed6-b8ee-78a586e3d363" xlink:href="viv-20251231.xsd#viv_FinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_FinancingFinancialInstitutionsMember_019c72a3-57c4-7ed6-b8ee-78a586e3d363" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayFIDCsMember_019c72a4-4b36-74fc-8074-fac1d6c686bc" xlink:href="viv-20251231.xsd#viv_VivoPayFIDCsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_VivoPayFIDCsMember_019c72a4-4b36-74fc-8074-fac1d6c686bc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DesenrolaProgramMember_019c72a5-d83f-71c2-b60d-771d2ed35fa5" xlink:href="viv-20251231.xsd#viv_DesenrolaProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c7298-c042-73dd-a71e-05156f2b41de" xlink:to="loc_viv_DesenrolaProgramMember_019c72a5-d83f-71c2-b60d-771d2ed35fa5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesAxis_019c729b-21a2-7236-9fc2-ed84f3fe91a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_ifrs-full_JointVenturesAxis_019c729b-21a2-7236-9fc2-ed84f3fe91a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c729b-21a2-7236-9fc2-ed84f3fe91a7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_JointVenturesAxis_019c729b-21a2-7236-9fc2-ed84f3fe91a7" xlink:to="loc_ifrs-full_JointVenturesDomain_019c729b-21a2-7236-9fc2-ed84f3fe91a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_JointVenturesDomain_019c729b-21a2-7b17-a4a2-a1cc8f02a629" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_JointVenturesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_JointVenturesAxis_019c729b-21a2-7236-9fc2-ed84f3fe91a7" xlink:to="loc_ifrs-full_JointVenturesDomain_019c729b-21a2-7b17-a4a2-a1cc8f02a629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c729b-21a2-7598-a137-be4ff0513ca0" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_JointVenturesDomain_019c729b-21a2-7b17-a4a2-a1cc8f02a629" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c729b-21a2-7598-a137-be4ff0513ca0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c729d-442e-7097-968b-124d5177bbd4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c729d-442e-7097-968b-124d5177bbd4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c729d-442e-7097-968b-124d5177bbd4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c729d-442e-7097-968b-124d5177bbd4" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c729d-442e-7097-968b-124d5177bbd4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c729d-442e-77e6-b814-edc233b71175" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfContingentLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesAxis_019c729d-442e-7097-968b-124d5177bbd4" xlink:to="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c729d-442e-77e6-b814-edc233b71175" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesRelatedToBusinessCombinationMember_019c729d-442e-7eaf-b8fa-a2498ac0c703" xlink:href="viv-20251231.xsd#viv_LiabilitiesRelatedToBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfContingentLiabilitiesDomain_019c729d-442e-77e6-b814-edc233b71175" xlink:to="loc_viv_LiabilitiesRelatedToBusinessCombinationMember_019c729d-442e-7eaf-b8fa-a2498ac0c703" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c729d-7a8c-7c8c-8388-87833974af20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c729d-7a8c-7c8c-8388-87833974af20" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-7c8c-8388-87833974af20_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c729d-7a8c-7c8c-8388-87833974af20" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-7c8c-8388-87833974af20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c729d-7a8c-7c8c-8388-87833974af20" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c729d-7a8c-77f3-b83c-bd1b230867e0" xlink:href="viv-20251231.xsd#viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:to="loc_viv_VitaItComrcioEServiosDeSoluesEmTiLtdaMember_019c729d-7a8c-77f3-b83c-bd1b230867e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationValeSaudeSempreMember_019c729e-1eec-7c61-abb0-2abdb3a3894b" xlink:href="viv-20251231.xsd#viv_BusinessCombinationValeSaudeSempreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:to="loc_viv_BusinessCombinationValeSaudeSempreMember_019c729e-1eec-7c61-abb0-2abdb3a3894b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationIPNETMember_019c729e-c024-7c2e-9c89-8077b4c36ad4" xlink:href="viv-20251231.xsd#viv_BusinessCombinationIPNETMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:to="loc_viv_BusinessCombinationIPNETMember_019c729e-c024-7c2e-9c89-8077b4c36ad4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationSamaumaMember_019c729f-6fba-7ff5-ad88-7728e5ee0028" xlink:href="viv-20251231.xsd#viv_BusinessCombinationSamaumaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:to="loc_viv_BusinessCombinationSamaumaMember_019c729f-6fba-7ff5-ad88-7728e5ee0028" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessCombinationCyberMember_019c72a0-6eb1-7a67-bb35-47d4f36cab6b" xlink:href="viv-20251231.xsd#viv_BusinessCombinationCyberMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c729d-7a8c-74f1-bb3e-9c2751e107dd" xlink:to="loc_viv_BusinessCombinationCyberMember_019c72a0-6eb1-7a67-bb35-47d4f36cab6b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c729d-7a8c-75fa-a037-c88d87d3357b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c729d-7a8c-75fa-a037-c88d87d3357b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-75fa-a037-c88d87d3357b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c729d-7a8c-75fa-a037-c88d87d3357b" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-75fa-a037-c88d87d3357b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c729d-7a8c-75fa-a037-c88d87d3357b" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c729d-7a8c-77e3-b277-810693807bb3" xlink:href="viv-20251231.xsd#viv_TelefnicaInfraestruturaESeguranaLtda.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_TelefnicaInfraestruturaESeguranaLtda.Member_019c729d-7a8c-77e3-b277-810693807bb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PopInternetLtdaMember_019c729e-1eec-7b85-aefa-055ac8099610" xlink:href="viv-20251231.xsd#viv_PopInternetLtdaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_PopInternetLtdaMember_019c729e-1eec-7b85-aefa-055ac8099610" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CloudCoMember_019c729e-c024-7e7f-b366-273b47b82213" xlink:href="viv-20251231.xsd#viv_CloudCoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_CloudCoMember_019c729e-c024-7e7f-b366-273b47b82213" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerraNetworksMember_019c729f-6fba-7dc0-906a-5a769650ef00" xlink:href="viv-20251231.xsd#viv_TerraNetworksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_TerraNetworksMember_019c729f-6fba-7dc0-906a-5a769650ef00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TISMember_019c72a0-6eb1-793a-a0ae-d8fc85c95913" xlink:href="viv-20251231.xsd#viv_TISMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_TISMember_019c72a0-6eb1-793a-a0ae-d8fc85c95913" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoMoneyICreditRightsInvestmentFundMember_019c72a4-4b36-72d4-a41e-607a81393e17" xlink:href="viv-20251231.xsd#viv_VivoMoneyICreditRightsInvestmentFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c729d-7a8c-71b3-8548-3adbbb69684d" xlink:to="loc_viv_VivoMoneyICreditRightsInvestmentFundMember_019c72a4-4b36-72d4-a41e-607a81393e17" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramAxis_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a" xlink:href="viv-20251231.xsd#viv_AmnestyProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c7296-dea8-74c8-9e86-c1adb98d18d2" xlink:to="loc_viv_AmnestyProgramAxis_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramDomain_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a_default" xlink:href="viv-20251231.xsd#viv_AmnestyProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_AmnestyProgramAxis_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a" xlink:to="loc_viv_AmnestyProgramDomain_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyProgramDomain_019c72a1-24b9-7d31-906c-232281eb051c" xlink:href="viv-20251231.xsd#viv_AmnestyProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_AmnestyProgramAxis_019c72a1-24b9-772e-b81d-4ae2ca9f2a2a" xlink:to="loc_viv_AmnestyProgramDomain_019c72a1-24b9-7d31-906c-232281eb051c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateOfRioGrandeDoSulAmnestyProgramMember_019c72a1-24b9-750d-a3f2-a67acca1681e" xlink:href="viv-20251231.xsd#viv_StateOfRioGrandeDoSulAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c72a1-24b9-7d31-906c-232281eb051c" xlink:to="loc_viv_StateOfRioGrandeDoSulAmnestyProgramMember_019c72a1-24b9-750d-a3f2-a67acca1681e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StateOfMinasGeraisAmnestyProgramMember_019c72a1-b24f-7bcd-acf7-4904ba2cb525" xlink:href="viv-20251231.xsd#viv_StateOfMinasGeraisAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c72a1-24b9-7d31-906c-232281eb051c" xlink:to="loc_viv_StateOfMinasGeraisAmnestyProgramMember_019c72a1-b24f-7bcd-acf7-4904ba2cb525" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_StatesOfSaoPauloAndParanaAmnestyProgramMember_019c72a2-d2a9-7745-ba2e-62e3ff9e542e" xlink:href="viv-20251231.xsd#viv_StatesOfSaoPauloAndParanaAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AmnestyProgramDomain_019c72a1-24b9-7d31-906c-232281eb051c" xlink:to="loc_viv_StatesOfSaoPauloAndParanaAmnestyProgramMember_019c72a2-d2a9-7745-ba2e-62e3ff9e542e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes_019c7297-5018-73c3-8ed1-7a18603210db" xlink:href="viv-20251231.xsd#viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_AcquisitionRelatedLoanCompletionTimeForUsePurposes_019c7297-5018-73c3-8ed1-7a18603210db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceLeaseWeightedAnnualInterestRate_019c7297-cfde-799f-a24e-026b61188e6f" xlink:href="viv-20251231.xsd#viv_FinanceLeaseWeightedAnnualInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_FinanceLeaseWeightedAnnualInterestRate_019c7297-cfde-799f-a24e-026b61188e6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinanceLeaseAverageMaturityPeriod_019c7298-38b8-7bdf-9b2d-9cfc71fa8658" xlink:href="viv-20251231.xsd#viv_FinanceLeaseAverageMaturityPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_FinanceLeaseAverageMaturityPeriod_019c7298-38b8-7bdf-9b2d-9cfc71fa8658" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfDebenturesIssued_019c7298-c042-7c39-a12b-5b02f5473199" xlink:href="viv-20251231.xsd#viv_NumberOfDebenturesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_NumberOfDebenturesIssued_019c7298-c042-7c39-a12b-5b02f5473199" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebenturesNominalUnitValue_019c7299-035b-780e-85ce-17f90dffc4fc" xlink:href="viv-20251231.xsd#viv_DebenturesNominalUnitValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_DebenturesNominalUnitValue_019c7299-035b-780e-85ce-17f90dffc4fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c7299-433d-7e77-aeca-79e36db031da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_ifrs-full_NotionalAmount_019c7299-433d-7e77-aeca-79e36db031da" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_019c7299-be5d-7c7c-9a91-fbea1966756c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsAdjustmentToInterestRateBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_ifrs-full_BorrowingsAdjustmentToInterestRateBasis_019c7299-be5d-7c7c-9a91-fbea1966756c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfDistributionOfResourcesToTheCompanysShareholdersAsAPercentageOfTheShareCapital_019c729a-9aa0-7434-abbc-e20833ce0d7c" xlink:href="viv-20251231.xsd#viv_PercentageOfDistributionOfResourcesToTheCompanysShareholdersAsAPercentageOfTheShareCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_PercentageOfDistributionOfResourcesToTheCompanysShareholdersAsAPercentageOfTheShareCapital_019c729a-9aa0-7434-abbc-e20833ce0d7c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ThresholdPercentageForDisposalOfAssetsTriggeringEarlyMaturity_019c729a-c4e5-7b19-aee6-62b892ee51d8" xlink:href="viv-20251231.xsd#viv_ThresholdPercentageForDisposalOfAssetsTriggeringEarlyMaturity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_ThresholdPercentageForDisposalOfAssetsTriggeringEarlyMaturity_019c729a-c4e5-7b19-aee6-62b892ee51d8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TotalTermOfTheDebentures_019c729b-c250-79cc-8e99-6a07a8bd7205" xlink:href="viv-20251231.xsd#viv_TotalTermOfTheDebentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_TotalTermOfTheDebentures_019c729b-c250-79cc-8e99-6a07a8bd7205" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TotalInstallmentsToCompany_019c729b-fd89-759c-af1f-e2f6ffe747bf" xlink:href="viv-20251231.xsd#viv_TotalInstallmentsToCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_TotalInstallmentsToCompany_019c729b-fd89-759c-af1f-e2f6ffe747bf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BusinessDaysConsideredForTheAdjustmentToTheUpdatedNominalValueOfTheDebentures_019c729c-60b8-7c12-9602-cd9df8e02abc" xlink:href="viv-20251231.xsd#viv_BusinessDaysConsideredForTheAdjustmentToTheUpdatedNominalValueOfTheDebentures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_BusinessDaysConsideredForTheAdjustmentToTheUpdatedNominalValueOfTheDebentures_019c729c-60b8-7c12-9602-cd9df8e02abc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReimbursementPeriod_019c729c-bc1a-7000-8f73-34cf4046da6b" xlink:href="viv-20251231.xsd#viv_ReimbursementPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_ReimbursementPeriod_019c729c-bc1a-7000-8f73-34cf4046da6b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReferenceInterestRateSELIC_019c729c-f424-74a5-b298-9c4f9206c404" xlink:href="viv-20251231.xsd#viv_ReferenceInterestRateSELIC"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_ReferenceInterestRateSELIC_019c729c-f424-74a5-b298-9c4f9206c404" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancing_019c729d-442e-7e94-9627-9eb71cf502ff" xlink:href="viv-20251231.xsd#viv_LoansAndFinancing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_LoansAndFinancing_019c729d-442e-7e94-9627-9eb71cf502ff" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c729d-7a8c-7bc6-9e7c-00848c72b52f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_019c729d-7a8c-7bc6-9e7c-00848c72b52f" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashTransferred_019c729d-aa8a-737c-a70d-4558c5e16995" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_ifrs-full_CashTransferred_019c729d-aa8a-737c-a70d-4558c5e16995" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConsiderationBasedOnContractualClauses_019c729d-dd34-7ee2-9262-64a4276dbf61" xlink:href="viv-20251231.xsd#viv_ConsiderationBasedOnContractualClauses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_ConsiderationBasedOnContractualClauses_019c729d-dd34-7ee2-9262-64a4276dbf61" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfDaysPriorToTheActualPayment_019c729f-a7ca-713d-91bd-9bdedcdc4e43" xlink:href="viv-20251231.xsd#viv_NumberOfDaysPriorToTheActualPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_NumberOfDaysPriorToTheActualPayment_019c729f-a7ca-713d-91bd-9bdedcdc4e43" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmnestyAndRefinancingProgramsForICMS_019c72a1-24b9-750c-8e7d-0f3b1b1de1c0" xlink:href="viv-20251231.xsd#viv_AmnestyAndRefinancingProgramsForICMS"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_AmnestyAndRefinancingProgramsForICMS_019c72a1-24b9-750c-8e7d-0f3b1b1de1c0" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfInstallmentsForPaymentsOffered_019c72a1-4eb5-77e2-b715-5077814fb5a3" xlink:href="viv-20251231.xsd#viv_NumberOfInstallmentsForPaymentsOffered"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_NumberOfInstallmentsForPaymentsOffered_019c72a1-4eb5-77e2-b715-5077814fb5a3" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BalanceOfContractualCostsIncurred_019c72a1-8100-7e85-abe7-b985fa9ddbdd" xlink:href="viv-20251231.xsd#viv_BalanceOfContractualCostsIncurred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_BalanceOfContractualCostsIncurred_019c72a1-8100-7e85-abe7-b985fa9ddbdd" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentsOfInstallmentAgreements_019c72a1-de03-7bdf-b17a-fa557cdf2543" xlink:href="viv-20251231.xsd#viv_PaymentsOfInstallmentAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_PaymentsOfInstallmentAgreements_019c72a1-de03-7bdf-b17a-fa557cdf2543" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RemaingBalanceOfAmnestyAndRefinancingProgramsForICMS_019c72a2-13ab-73e8-af3b-793087648464" xlink:href="viv-20251231.xsd#viv_RemaingBalanceOfAmnestyAndRefinancingProgramsForICMS"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_RemaingBalanceOfAmnestyAndRefinancingProgramsForICMS_019c72a2-13ab-73e8-af3b-793087648464" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InitialBalanceWhenJoiningInstallment_019c72a2-411d-7450-9013-adb2980ac5a3" xlink:href="viv-20251231.xsd#viv_InitialBalanceWhenJoiningInstallment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_InitialBalanceWhenJoiningInstallment_019c72a2-411d-7450-9013-adb2980ac5a3" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DownPaymentWhenJoiningInstallment_019c72a2-6c96-7955-9e05-f03f749eca64" xlink:href="viv-20251231.xsd#viv_DownPaymentWhenJoiningInstallment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_DownPaymentWhenJoiningInstallment_019c72a2-6c96-7955-9e05-f03f749eca64" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfLoanCDIWithCaixaEconomicaFederal_019c72a3-8be5-7d09-af90-efb8091cd332" xlink:href="viv-20251231.xsd#viv_PercentageOfLoanCDIWithCaixaEconomicaFederal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_PercentageOfLoanCDIWithCaixaEconomicaFederal_019c72a3-8be5-7d09-af90-efb8091cd332" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil_019c72a4-1835-7f8c-bb2d-2fb9aa9c559d" xlink:href="viv-20251231.xsd#viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_SeniorSharesInTheVivoMoneyFIDCsAndTheLoanAgreementOfTheSubsidiaryCloudCoBrasil_019c72a4-1835-7f8c-bb2d-2fb9aa9c559d" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoPayFIDCsSubscriptionOfSeniorShares_019c72a4-4b36-7e64-a515-4073768e54a3" xlink:href="viv-20251231.xsd#viv_VivoPayFIDCsSubscriptionOfSeniorShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_VivoPayFIDCsSubscriptionOfSeniorShares_019c72a4-4b36-7e64-a515-4073768e54a3" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RemunerationPercentageOfCDI_019c72a4-76b5-7e77-9e45-bd8c804fb757" xlink:href="viv-20251231.xsd#viv_RemunerationPercentageOfCDI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_RemunerationPercentageOfCDI_019c72a4-76b5-7e77-9e45-bd8c804fb757" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfSpread_019c72a4-cb03-760f-9a53-3b09ec7a13e9" xlink:href="viv-20251231.xsd#viv_PercentageOfSpread"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_PercentageOfSpread_019c72a4-cb03-760f-9a53-3b09ec7a13e9" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ContributionThroughTheSubscriptionOfSeniorShares_019c72a4-f752-7f7c-95dd-922463a074a7" xlink:href="viv-20251231.xsd#viv_ContributionThroughTheSubscriptionOfSeniorShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_ContributionThroughTheSubscriptionOfSeniorShares_019c72a4-f752-7f7c-95dd-922463a074a7" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoanAgreementBetweenCloudCoBrasilAndTCCT_019c72a5-2667-7a02-80ac-a33a1cae2faa" xlink:href="viv-20251231.xsd#viv_LoanAgreementBetweenCloudCoBrasilAndTCCT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_LoanAgreementBetweenCloudCoBrasilAndTCCT_019c72a5-2667-7a02-80ac-a33a1cae2faa" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SwapContractedAndFixedInterestForCDI_019c72a5-5617-7c23-8abb-54abd5ad7df7" xlink:href="viv-20251231.xsd#viv_SwapContractedAndFixedInterestForCDI"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_SwapContractedAndFixedInterestForCDI_019c72a5-5617-7c23-8abb-54abd5ad7df7" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FairValueOfLoanAgreementBetweenCloudCoBrasilAndTCCT_019c72a5-a8cd-74ae-a555-feb0569b94a8" xlink:href="viv-20251231.xsd#viv_FairValueOfLoanAgreementBetweenCloudCoBrasilAndTCCT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_FairValueOfLoanAgreementBetweenCloudCoBrasilAndTCCT_019c72a5-a8cd-74ae-a555-feb0569b94a8" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MonthlyInterestRate_019c72a6-0b1b-73f4-ba44-696505ca1d1e" xlink:href="viv-20251231.xsd#viv_MonthlyInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c7297-5018-75ea-8030-9b4ca9226950" xlink:to="loc_viv_MonthlyInterestRate_019c72a6-0b1b-73f4-ba44-696505ca1d1e" xlink:type="arc" order="35"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/DEFERREDINCOMEExpectedperiodsofrealizationofcontractualliabilitiesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#DEFERREDINCOMEExpectedperiodsofrealizationofcontractualliabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/DEFERREDINCOMEExpectedperiodsofrealizationofcontractualliabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesLineItems_019c4274-2cdf-79b9-b82f-9df7ca7c89fc" xlink:href="viv-20251231.xsd#viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesTable_019c4274-2cdf-7356-b5f1-39dd5ff25712" xlink:href="viv-20251231.xsd#viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesLineItems_019c4274-2cdf-79b9-b82f-9df7ca7c89fc" xlink:to="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesTable_019c4274-2cdf-7356-b5f1-39dd5ff25712" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2cdf-75be-9d6e-58a90fb0d24e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesTable_019c4274-2cdf-7356-b5f1-39dd5ff25712" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2cdf-75be-9d6e-58a90fb0d24e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2cdf-75be-9d6e-58a90fb0d24e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2cdf-75be-9d6e-58a90fb0d24e" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2cdf-75be-9d6e-58a90fb0d24e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2cdf-75be-9d6e-58a90fb0d24e" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2cdf-7016-89fe-b074a0bff3c5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2cdf-7016-89fe-b074a0bff3c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2cdf-729e-b3de-05bef3d4ef67" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2cdf-729e-b3de-05bef3d4ef67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2cdf-729d-8979-fd6337fd80c4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2cdf-729d-8979-fd6337fd80c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2cdf-72aa-839c-d213c56d12c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2cdf-72aa-839c-d213c56d12c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2cdf-7196-bd5a-ee367e3ca2f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2cdf-7196-bd5a-ee367e3ca2f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2cdf-778c-af10-5c8f6a716fd3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2cdf-7299-b4ce-eff1b9975556" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2cdf-778c-af10-5c8f6a716fd3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeContractualLiabilities_019c4274-2cdf-71b2-bb83-c60d474f89a7" xlink:href="viv-20251231.xsd#viv_DeferredIncomeContractualLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfMaturityAnalysisOfDeferredIncomeFromContractualLiabilitiesLineItems_019c4274-2cdf-79b9-b82f-9df7ca7c89fc" xlink:to="loc_viv_DeferredIncomeContractualLiabilities_019c4274-2cdf-71b2-bb83-c60d474f89a7" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EquityAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#EquityAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EquityAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReductionAxis_019c57ea-f6d8-7858-90df-a26d69a00c35" xlink:href="viv-20251231.xsd#viv_CapitalReductionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:to="loc_viv_CapitalReductionAxis_019c57ea-f6d8-7858-90df-a26d69a00c35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReductionDomain_019c57ea-f6d8-7858-90df-a26d69a00c35_default" xlink:href="viv-20251231.xsd#viv_CapitalReductionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_CapitalReductionAxis_019c57ea-f6d8-7858-90df-a26d69a00c35" xlink:to="loc_viv_CapitalReductionDomain_019c57ea-f6d8-7858-90df-a26d69a00c35_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReductionDomain_019c57eb-25cb-770e-8613-dac3a9da117b" xlink:href="viv-20251231.xsd#viv_CapitalReductionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_CapitalReductionAxis_019c57ea-f6d8-7858-90df-a26d69a00c35" xlink:to="loc_viv_CapitalReductionDomain_019c57eb-25cb-770e-8613-dac3a9da117b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A1stCapitalReductionMember_019c57eb-9252-7bda-962a-fff5cec34927" xlink:href="viv-20251231.xsd#viv_A1stCapitalReductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_CapitalReductionDomain_019c57eb-25cb-770e-8613-dac3a9da117b" xlink:to="loc_viv_A1stCapitalReductionMember_019c57eb-9252-7bda-962a-fff5cec34927" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c71d2-130f-7da2-9f76-9d69b53a3e37" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c71d2-130f-7da2-9f76-9d69b53a3e37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7da2-9f76-9d69b53a3e37_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c71d2-130f-7da2-9f76-9d69b53a3e37" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7da2-9f76-9d69b53a3e37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c71d2-130f-7da2-9f76-9d69b53a3e37" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesMember_019c71d2-130f-7e85-a1d0-991a357e5639" xlink:href="viv-20251231.xsd#viv_IncomeReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_IncomeReservesMember_019c71d2-130f-7e85-a1d0-991a357e5639" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember_019c721c-e03e-7880-9b5f-e20c97896c32" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasurySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_ifrs-full_TreasurySharesMember_019c721c-e03e-7880-9b5f-e20c97896c32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CapitalReserveMember_019c7228-ea84-7494-9a78-688b3cc099ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CapitalReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_ifrs-full_CapitalReserveMember_019c7228-ea84-7494-9a78-688b3cc099ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCapitalReservesMember_019c7231-29c3-73d0-a2b6-a206f01643f7" xlink:href="viv-20251231.xsd#viv_OtherCapitalReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_OtherCapitalReservesMember_019c7231-29c3-73d0-a2b6-a206f01643f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesLegalReserveMember_019c7238-ad42-7256-a185-4fba0153c88d" xlink:href="viv-20251231.xsd#viv_IncomeReservesLegalReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_IncomeReservesLegalReserveMember_019c7238-ad42-7256-a185-4fba0153c88d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxIncentiveReserveMember_019c723c-29fb-7054-b61e-fbe8e6d762a4" xlink:href="viv-20251231.xsd#viv_TaxIncentiveReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_TaxIncentiveReserveMember_019c723c-29fb-7054-b61e-fbe8e6d762a4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveForRemunerationAndInvestmentsMember_019c7246-e66b-7932-8669-f64d9eb1abb0" xlink:href="viv-20251231.xsd#viv_ReserveForRemunerationAndInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_ReserveForRemunerationAndInvestmentsMember_019c7246-e66b-7932-8669-f64d9eb1abb0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SpecialGoodwillReserveMember_019c7255-06fc-7a1d-a8a4-ebcdc2b45a38" xlink:href="viv-20251231.xsd#viv_SpecialGoodwillReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c71d2-130f-7195-8102-259ea92f0ddc" xlink:to="loc_viv_SpecialGoodwillReserveMember_019c7255-06fc-7a1d-a8a4-ebcdc2b45a38" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c720d-a2f3-7c5d-ae90-b96a06394e30" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:to="loc_ifrs-full_RangeAxis_019c720d-a2f3-7c5d-ae90-b96a06394e30" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c720d-a2f3-7c5d-ae90-b96a06394e30_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c720d-a2f3-7c5d-ae90-b96a06394e30" xlink:to="loc_ifrs-full_RangeDomain_019c720d-a2f3-7c5d-ae90-b96a06394e30_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c720d-a2f3-7d81-aae7-90939e656a95" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c720d-a2f3-7c5d-ae90-b96a06394e30" xlink:to="loc_ifrs-full_RangeDomain_019c720d-a2f3-7d81-aae7-90939e656a95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c720d-a2f3-7636-9871-5184ac3c042f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c720d-a2f3-7d81-aae7-90939e656a95" xlink:to="loc_ifrs-full_TopOfRangeMember_019c720d-a2f3-7636-9871-5184ac3c042f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_019c75c0-e1b8-7d4a-994b-05aca4213759" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_019c75c0-e1b8-7d4a-994b-05aca4213759" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c75c0-e1b8-7d4a-994b-05aca4213759_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c75c0-e1b8-7d4a-994b-05aca4213759" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c75c0-e1b8-7d4a-994b-05aca4213759_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsDomain_019c75c0-ffab-7f3c-9dd9-6630da6e0d26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BusinessCombinationsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_019c75c0-e1b8-7d4a-994b-05aca4213759" xlink:to="loc_ifrs-full_BusinessCombinationsDomain_019c75c0-ffab-7f3c-9dd9-6630da6e0d26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TELEFONICACYBERSECURITYCLOUDTECHSLMember_019c75c3-4a1a-739e-9b42-2b2fa41b4d64" xlink:href="viv-20251231.xsd#viv_TELEFONICACYBERSECURITYCLOUDTECHSLMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BusinessCombinationsDomain_019c75c0-ffab-7f3c-9dd9-6630da6e0d26" xlink:to="loc_viv_TELEFONICACYBERSECURITYCLOUDTECHSLMember_019c75c3-4a1a-739e-9b42-2b2fa41b4d64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TypeOfReservesAxis_019c721c-e03e-7475-92df-7cbe4ac5d0cc" xlink:href="viv-20251231.xsd#viv_TypeOfReservesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c4cd9-7445-7b02-a3b2-a323618e4677" xlink:to="loc_viv_TypeOfReservesAxis_019c721c-e03e-7475-92df-7cbe4ac5d0cc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveDomain_019c721c-e03e-7475-92df-7cbe4ac5d0cc_default" xlink:href="viv-20251231.xsd#viv_ReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_TypeOfReservesAxis_019c721c-e03e-7475-92df-7cbe4ac5d0cc" xlink:to="loc_viv_ReserveDomain_019c721c-e03e-7475-92df-7cbe4ac5d0cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveDomain_019c721c-e03e-705d-804c-8384d1f762e4" xlink:href="viv-20251231.xsd#viv_ReserveDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_TypeOfReservesAxis_019c721c-e03e-7475-92df-7cbe4ac5d0cc" xlink:to="loc_viv_ReserveDomain_019c721c-e03e-705d-804c-8384d1f762e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReservesMember_019c721c-e03e-7ad9-9632-9bc2fd5dc3c7" xlink:href="viv-20251231.xsd#viv_CapitalReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ReserveDomain_019c721c-e03e-705d-804c-8384d1f762e4" xlink:to="loc_viv_CapitalReservesMember_019c721c-e03e-7ad9-9632-9bc2fd5dc3c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesMember_019c7238-ad42-73fd-a2e8-bba5f956d050" xlink:href="viv-20251231.xsd#viv_IncomeReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ReserveDomain_019c721c-e03e-705d-804c-8384d1f762e4" xlink:to="loc_viv_IncomeReservesMember_019c7238-ad42-73fd-a2e8-bba5f956d050" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReductionOfIssuedCapital_019c574c-7091-767e-8201-24b526843371" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReductionOfIssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_ReductionOfIssuedCapital_019c574c-7091-767e-8201-24b526843371" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital_019c5748-68cd-703b-9c9a-5c06a3262cb7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_IssuedCapital_019c5748-68cd-703b-9c9a-5c06a3262cb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentOfReductionInShareCapitalNetOfIncomeTaxPerShare_019c5758-4667-76c2-a9fc-7c8862601280" xlink:href="viv-20251231.xsd#viv_PaymentOfReductionInShareCapitalNetOfIncomeTaxPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_PaymentOfReductionInShareCapitalNetOfIncomeTaxPerShare_019c5758-4667-76c2-a9fc-7c8862601280" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentsMadeToIdentifiedShareholders_019c5769-a4b9-71e0-9d9e-3a4c9fcd2a42" xlink:href="viv-20251231.xsd#viv_PaymentsMadeToIdentifiedShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_PaymentsMadeToIdentifiedShareholders_019c5769-a4b9-71e0-9d9e-3a4c9fcd2a42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OutstandingPaymentsToIdentifiedShareholders_019c57a2-e8a0-7e50-a0eb-3a7b5ff2f647" xlink:href="viv-20251231.xsd#viv_OutstandingPaymentsToIdentifiedShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_OutstandingPaymentsToIdentifiedShareholders_019c57a2-e8a0-7e50-a0eb-3a7b5ff2f647" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmountOfReduceTheCompanyShareCapital_019c57ea-152e-7807-9e93-6d653835f6da" xlink:href="viv-20251231.xsd#viv_AmountOfReduceTheCompanyShareCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_AmountOfReduceTheCompanyShareCapital_019c57ea-152e-7807-9e93-6d653835f6da" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConsolidationOfCommonShares_019c57fc-96cf-7901-848c-0137ae3f73b2" xlink:href="viv-20251231.xsd#viv_ConsolidationOfCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_ConsolidationOfCommonShares_019c57fc-96cf-7901-848c-0137ae3f73b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SplitOfCommonShares_019c57fd-11c1-7ea4-98a4-90ca550e4d60" xlink:href="viv-20251231.xsd#viv_SplitOfCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_SplitOfCommonShares_019c57fd-11c1-7ea4-98a4-90ca550e4d60" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_019c5808-c24e-7ffe-94fd-0016500c5281" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_NumberOfSharesIssued_019c5808-c24e-7ffe-94fd-0016500c5281" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfCommonSharesHeldForSale_019c5810-a63b-7b98-a4da-f7918750f589" xlink:href="viv-20251231.xsd#viv_NumberOfCommonSharesHeldForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_NumberOfCommonSharesHeldForSale_019c5810-a63b-7b98-a4da-f7918750f589" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CommonSharesSoldAtAuction_019c5877-f4f9-7cac-8310-01cd8077e264" xlink:href="viv-20251231.xsd#viv_CommonSharesSoldAtAuction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_CommonSharesSoldAtAuction_019c5877-f4f9-7cac-8310-01cd8077e264" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NominalValuePerCommonShareSoldAtAuction_019c588a-469f-779e-bd71-2eee36a4fb92" xlink:href="viv-20251231.xsd#viv_NominalValuePerCommonShareSoldAtAuction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_NominalValuePerCommonShareSoldAtAuction_019c588a-469f-779e-bd71-2eee36a4fb92" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentToIdentifiedMinorityShareholders_019c7170-2cee-7b10-8ec2-91d560c5b434" xlink:href="viv-20251231.xsd#viv_PaymentToIdentifiedMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_PaymentToIdentifiedMinorityShareholders_019c7170-2cee-7b10-8ec2-91d560c5b434" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ObligationRelatedToAmountsDueToUnidentifiedShareholdersOrShareholdersWithIncompleteRegistrationInformation_019c7177-3af6-7134-889e-d83602a1d3bc" xlink:href="viv-20251231.xsd#viv_ObligationRelatedToAmountsDueToUnidentifiedShareholdersOrShareholdersWithIncompleteRegistrationInformation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_ObligationRelatedToAmountsDueToUnidentifiedShareholdersOrShareholdersWithIncompleteRegistrationInformation_019c7177-3af6-7134-889e-d83602a1d3bc" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssuedAndFullyPaid_019c71cd-9660-7e80-badb-24715c1e7c1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssuedAndFullyPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_NumberOfSharesIssuedAndFullyPaid_019c71cd-9660-7e80-badb-24715c1e7c1e" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_019c71d1-2239-7375-8e38-b8418e0bd529" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExercisePriceOfOutstandingShareOptions2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_019c71d1-2239-7375-8e38-b8418e0bd529" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsTreasuryStockSharesAcquired_019c71d2-130f-7c32-8ebd-18fa5bfab5d6" xlink:href="viv-20251231.xsd#viv_IfrsTreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_IfrsTreasuryStockSharesAcquired_019c71d2-130f-7c32-8ebd-18fa5bfab5d6" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumNumberOfSharesRepurchase_019c71d4-4375-7a54-8a30-6fbb818444ab" xlink:href="viv-20251231.xsd#viv_MaximumNumberOfSharesRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_MaximumNumberOfSharesRepurchase_019c71d4-4375-7a54-8a30-6fbb818444ab" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_019c71d9-8e6c-7ed0-b301-b63f09733af3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_019c71d9-8e6c-7ed0-b301-b63f09733af3" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c71f5-bed0-7980-b461-258839ca1054" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c71f5-bed0-7980-b461-258839ca1054" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumValueToBeUsedInTheSharesRepurchaseProgram_019c720d-a2f3-71da-a174-0a6e5cb55ba1" xlink:href="viv-20251231.xsd#viv_MaximumValueToBeUsedInTheSharesRepurchaseProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_MaximumValueToBeUsedInTheSharesRepurchaseProgram_019c720d-a2f3-71da-a174-0a6e5cb55ba1" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CancellationOfCommonShares_019c720f-b6b4-7cbf-8fbb-427db64cc6e2" xlink:href="viv-20251231.xsd#viv_CancellationOfCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_CancellationOfCommonShares_019c720f-b6b4-7cbf-8fbb-427db64cc6e2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfCommonSharesCancelled_019c7215-48bf-7810-a705-29324d0a297a" xlink:href="viv-20251231.xsd#viv_PercentageOfCommonSharesCancelled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_PercentageOfCommonSharesCancelled_019c7215-48bf-7810-a705-29324d0a297a" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CancellationOfTreasuryShares_019c7217-5014-74c2-9185-10ba22a164e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CancellationOfTreasuryShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_CancellationOfTreasuryShares_019c7217-5014-74c2-9185-10ba22a164e6" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_019c721a-9886-7b9e-9dd9-050d332d5128" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalAndCapitalRedemptionReserves_019c721b-adfa-7ea9-ad26-8677a9072ec1" xlink:href="viv-20251231.xsd#viv_CapitalAndCapitalRedemptionReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_CapitalAndCapitalRedemptionReserves_019c721b-adfa-7ea9-ad26-8677a9072ec1" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c721c-e03e-78de-b9cb-e4b3dceff370" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_Equity_019c721c-e03e-78de-b9cb-e4b3dceff370" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfTreasurySharesCancelled_019c7226-2fbd-7c60-8b18-1ebd0e7866d4" xlink:href="viv-20251231.xsd#viv_NumberOfTreasurySharesCancelled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_NumberOfTreasurySharesCancelled_019c7226-2fbd-7c60-8b18-1ebd0e7866d4" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CancellationOfTreasuryShares_019c7227-1ee4-7a22-852f-8340318a1e40" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CancellationOfTreasuryShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalTransactionRelatedToReverseStockSplitAndStockSplitProcesses_019c722f-671b-7716-b3c2-f8c6c469bb5c" xlink:href="viv-20251231.xsd#viv_CapitalTransactionRelatedToReverseStockSplitAndStockSplitProcesses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_CapitalTransactionRelatedToReverseStockSplitAndStockSplitProcesses_019c722f-671b-7716-b3c2-f8c6c469bb5c" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReserves_019c7235-f7de-7416-9a26-eda24c3a7b6a" xlink:href="viv-20251231.xsd#viv_IncomeReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_IncomeReserves_019c7235-f7de-7416-9a26-eda24c3a7b6a" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LegalReservePercentageOfNetProfitForYear_019c7238-116c-7b41-8b7f-68e4e448e6c4" xlink:href="viv-20251231.xsd#viv_LegalReservePercentageOfNetProfitForYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_LegalReservePercentageOfNetProfitForYear_019c7238-116c-7b41-8b7f-68e4e448e6c4" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LegalReservePercentageOfShareCapital_019c7238-3a46-7ce1-b3e6-42ebad0b3760" xlink:href="viv-20251231.xsd#viv_LegalReservePercentageOfShareCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_LegalReservePercentageOfShareCapital_019c7238-3a46-7ce1-b3e6-42ebad0b3760" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfTreasuryShares_019c7239-a410-7316-a587-86c26d6517f2" xlink:href="viv-20251231.xsd#viv_NumberOfTreasuryShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_NumberOfTreasuryShares_019c7239-a410-7316-a587-86c26d6517f2" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasuryShares_019c723a-5994-771d-8889-3d289e932bb0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasuryShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_TreasuryShares_019c723a-5994-771d-8889-3d289e932bb0" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReductionOfThePercentageOfTaxOnCorporateIncome_019c7240-2fff-7d21-bf2a-274a1fa50844" xlink:href="viv-20251231.xsd#viv_ReductionOfThePercentageOfTaxOnCorporateIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_ReductionOfThePercentageOfTaxOnCorporateIncome_019c7240-2fff-7d21-bf2a-274a1fa50844" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RemainingAmountOfNetProfitProposedToReserveForRemunerationToShareholdersAndInvestments_019c7252-352d-7886-89bd-dcc63edb362f" xlink:href="viv-20251231.xsd#viv_RemainingAmountOfNetProfitProposedToReserveForRemunerationToShareholdersAndInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_RemainingAmountOfNetProfitProposedToReserveForRemunerationToShareholdersAndInvestments_019c7252-352d-7886-89bd-dcc63edb362f" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeToLegalReserve_019c7255-cf5c-76fc-8575-f35f97c891c3" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeToLegalReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_AllocationOfIncomeToLegalReserve_019c7255-cf5c-76fc-8575-f35f97c891c3" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfAllocationOfNetProfitToTheReserve_019c725b-e06d-7fe5-b9de-c7eb3e1f5322" xlink:href="viv-20251231.xsd#viv_PercentageOfAllocationOfNetProfitToTheReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_PercentageOfAllocationOfNetProfitToTheReserve_019c725b-e06d-7fe5-b9de-c7eb3e1f5322" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_UnclaimedDividendsAndInterestOnEquity_019c725c-c58b-7ede-b87c-9fc55e17b610" xlink:href="viv-20251231.xsd#viv_UnclaimedDividendsAndInterestOnEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_viv_UnclaimedDividendsAndInterestOnEquity_019c725c-c58b-7ede-b87c-9fc55e17b610" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty_019c75bf-7c98-7bf5-86b0-611d286d8f97" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsInvestmentProperty_019c75bf-7c98-7bf5-86b0-611d286d8f97" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustedWeightedAverageShares_019c75d0-8d0b-70f9-a8cf-8ad3b1b7f282" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustedWeightedAverageShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_AdjustedWeightedAverageShares_019c75d0-8d0b-70f9-a8cf-8ad3b1b7f282" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_019c75d4-4d0b-7a01-93cb-6eda1381874a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c4cd9-bacb-72a3-85d5-f03d6d4f66ce" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_019c75d4-4d0b-7a01-93cb-6eda1381874a" xlink:type="arc" order="42"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EqutiyDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#EqutiyDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EqutiyDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c715d-36e8-7746-8f42-b3b77307e00f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c715d-36e8-7746-8f42-b3b77307e00f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameAxis_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf" xlink:href="viv-20251231.xsd#viv_ShareholdersNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c715d-36e8-7746-8f42-b3b77307e00f" xlink:to="loc_viv_ShareholdersNameAxis_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameDomain_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf_default" xlink:href="viv-20251231.xsd#viv_ShareholdersNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_ShareholdersNameAxis_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf" xlink:to="loc_viv_ShareholdersNameDomain_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareholdersNameDomain_019c715d-9ae1-7268-b9cf-a8ef9417b880" xlink:href="viv-20251231.xsd#viv_ShareholdersNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_ShareholdersNameAxis_019c715d-9ae1-7cd1-be0b-12f8f4d46ebf" xlink:to="loc_viv_ShareholdersNameDomain_019c715d-9ae1-7268-b9cf-a8ef9417b880" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ControllingShareholdersMember_019c715d-9ae1-7a26-981d-c98139cf0fd3" xlink:href="viv-20251231.xsd#viv_ControllingShareholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_ShareholdersNameDomain_019c715d-9ae1-7268-b9cf-a8ef9417b880" xlink:to="loc_viv_ControllingShareholdersMember_019c715d-9ae1-7a26-981d-c98139cf0fd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c715d-9ae1-7457-a0b1-a59cfd12ed0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c715d-36e8-7746-8f42-b3b77307e00f" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c715d-9ae1-7457-a0b1-a59cfd12ed0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-7457-a0b1-a59cfd12ed0c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c715d-9ae1-7457-a0b1-a59cfd12ed0c" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-7457-a0b1-a59cfd12ed0c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c715d-9ae1-7457-a0b1-a59cfd12ed0c" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember_019c715d-9ae1-7b6a-be63-cc7d4770700a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_ifrs-full_IssuedCapitalMember_019c715d-9ae1-7b6a-be63-cc7d4770700a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaLatinoamericaHoldingS.l.Member_019c715d-9ae1-74d0-8a4b-9eeb7ec28b2a" xlink:href="viv-20251231.xsd#viv_TelefonicaLatinoamericaHoldingS.l.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_viv_TelefonicaLatinoamericaHoldingS.l.Member_019c715d-9ae1-74d0-8a4b-9eeb7ec28b2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaS.a.Member_019c715d-9ae1-7a51-b953-017756879eda" xlink:href="viv-20251231.xsd#viv_TelefonicaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_viv_TelefonicaS.a.Member_019c715d-9ae1-7a51-b953-017756879eda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaChileS.a.Member_019c715d-9ae1-7e6b-a5a7-87043eb03053" xlink:href="viv-20251231.xsd#viv_TelefonicaChileS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_viv_TelefonicaChileS.a.Member_019c715d-9ae1-7e6b-a5a7-87043eb03053" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherShareholdersMember_019c715d-9ae1-774a-b42b-3b3f95d7dd8d" xlink:href="viv-20251231.xsd#viv_OtherShareholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_viv_OtherShareholdersMember_019c715d-9ae1-774a-b42b-3b3f95d7dd8d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember_019c715d-9ae1-7d3e-b244-21c1e4c5d4a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasurySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c715d-9ae1-73a7-ad08-6844ec209250" xlink:to="loc_ifrs-full_TreasurySharesMember_019c715d-9ae1-7d3e-b244-21c1e4c5d4a6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_019c715d-9ae1-7d70-84a6-1a96ee2882d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:to="loc_ifrs-full_NumberOfSharesIssued_019c715d-9ae1-7d70-84a6-1a96ee2882d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfSharesIssued_019c715d-9ae1-7e58-8819-508086cbbba2" xlink:href="viv-20251231.xsd#viv_PercentageOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:to="loc_viv_PercentageOfSharesIssued_019c715d-9ae1-7e58-8819-508086cbbba2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding_019c715d-9ae1-787e-815e-ea3634c0b3fc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NumberOfSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:to="loc_ifrs-full_NumberOfSharesOutstanding_019c715d-9ae1-787e-815e-ea3634c0b3fc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BookValuePerShare_019c715d-9ae1-7ec8-9dea-cf5f40e7b7b8" xlink:href="viv-20251231.xsd#viv_BookValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715d-9ae1-7d73-88fa-b866d4ab7633" xlink:to="loc_viv_BookValuePerShare_019c715d-9ae1-7ec8-9dea-cf5f40e7b7b8" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EqutiyDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#EqutiyDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EqutiyDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7161-5747-7811-801d-b353ffbc1798" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7161-5747-7811-801d-b353ffbc1798" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c7161-afc2-75f6-b9a1-a72c3b8804a9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7161-5747-7811-801d-b353ffbc1798" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c7161-afc2-75f6-b9a1-a72c3b8804a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-75f6-b9a1-a72c3b8804a9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7161-afc2-75f6-b9a1-a72c3b8804a9" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-75f6-b9a1-a72c3b8804a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-7555-95bb-5b1bd2733641" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7161-afc2-75f6-b9a1-a72c3b8804a9" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-7555-95bb-5b1bd2733641" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalReservesMember_019c7161-afc2-74f1-949d-8f03ad1baf5d" xlink:href="viv-20251231.xsd#viv_CapitalReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-7555-95bb-5b1bd2733641" xlink:to="loc_viv_CapitalReservesMember_019c7161-afc2-74f1-949d-8f03ad1baf5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeReservesMember_019c7161-afc2-76cc-b672-e28d463da6e8" xlink:href="viv-20251231.xsd#viv_IncomeReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7161-afc2-7555-95bb-5b1bd2733641" xlink:to="loc_viv_IncomeReservesMember_019c7161-afc2-76cc-b672-e28d463da6e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates_019c7161-afc2-7a32-a9d4-3a3f897938e9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_ifrs-full_SharesInEntityHeldByEntityOrByItsSubsidiariesOrAssociates_019c7161-afc2-7a32-a9d4-3a3f897938e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ValueOfSharesHeldInCompany_019c7161-afc2-7848-9ef5-90db3949b2e3" xlink:href="viv-20251231.xsd#viv_ValueOfSharesHeldInCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_viv_ValueOfSharesHeldInCompany_019c7161-afc2-7848-9ef5-90db3949b2e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsTreasuryStockSharesAcquired_019c7161-afc2-7361-9a04-f1bca2679c94" xlink:href="viv-20251231.xsd#viv_IfrsTreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_viv_IfrsTreasuryStockSharesAcquired_019c7161-afc2-7361-9a04-f1bca2679c94" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareBuyback_019c7161-afc2-7c27-a32d-68a3e2de373a" xlink:href="viv-20251231.xsd#viv_ShareBuyback"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_viv_ShareBuyback_019c7161-afc2-7c27-a32d-68a3e2de373a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfSharesCancelled_019c7161-afc2-72ac-8312-e41bedc64925" xlink:href="viv-20251231.xsd#viv_NumberOfSharesCancelled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_viv_NumberOfSharesCancelled_019c7161-afc2-72ac-8312-e41bedc64925" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CancellationOfTreasuryShares_019c7161-afc2-7318-9f67-96f09bb7d83a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CancellationOfTreasuryShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_ifrs-full_CancellationOfTreasuryShares_019c7161-afc2-7318-9f67-96f09bb7d83a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_019c7161-afc2-79e7-82b3-5bce426f6efd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PaymentsToAcquireOrRedeemEntitysShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7161-afc2-7719-a46e-86b93a44763c" xlink:to="loc_ifrs-full_PaymentsToAcquireOrRedeemEntitysShares_019c7161-afc2-79e7-82b3-5bce426f6efd" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EqutiyDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#EqutiyDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EqutiyDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7159-ba1d-7a7d-a5f3-efc38dfd81dd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7159-ba1d-7a7d-a5f3-efc38dfd81dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DividendAndInterestOnEquityApprovalDatesAxis_019c715a-578c-7ece-b627-cf8ce9fa7863" xlink:href="viv-20251231.xsd#viv_DividendAndInterestOnEquityApprovalDatesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7159-ba1d-7a7d-a5f3-efc38dfd81dd" xlink:to="loc_viv_DividendAndInterestOnEquityApprovalDatesAxis_019c715a-578c-7ece-b627-cf8ce9fa7863" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7ece-b627-cf8ce9fa7863_default" xlink:href="viv-20251231.xsd#viv_DividendAndInterestOnEquityApprovalDatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_DividendAndInterestOnEquityApprovalDatesAxis_019c715a-578c-7ece-b627-cf8ce9fa7863" xlink:to="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7ece-b627-cf8ce9fa7863_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7775-a804-a15f974b0e90" xlink:href="viv-20251231.xsd#viv_DividendAndInterestOnEquityApprovalDatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_DividendAndInterestOnEquityApprovalDatesAxis_019c715a-578c-7ece-b627-cf8ce9fa7863" xlink:to="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7775-a804-a15f974b0e90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:href="viv-20251231.xsd#viv_A2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7775-a804-a15f974b0e90" xlink:to="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A02242025Member_019c726d-1782-71aa-9b4d-9bd7444b1741" xlink:href="viv-20251231.xsd#viv_A02242025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A02242025Member_019c726d-1782-71aa-9b4d-9bd7444b1741" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A03242025Member_019c726d-760e-712d-8701-0ce61ea27a36" xlink:href="viv-20251231.xsd#viv_A03242025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A03242025Member_019c726d-760e-712d-8701-0ce61ea27a36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A04112025Member_019c726f-af61-7c30-9229-24cc45162102" xlink:href="viv-20251231.xsd#viv_A04112025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A04112025Member_019c726f-af61-7c30-9229-24cc45162102" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A05222025Member_019c7270-6ac1-70ff-9aa0-ac0cd74d00a7" xlink:href="viv-20251231.xsd#viv_A05222025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A05222025Member_019c7270-6ac1-70ff-9aa0-ac0cd74d00a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A06232025Member_019c7270-ddcc-7e79-812a-d3bb81d9b273" xlink:href="viv-20251231.xsd#viv_A06232025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A06232025Member_019c7270-ddcc-7e79-812a-d3bb81d9b273" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A07252025Member_019c7271-e4c7-7104-bb00-11561bffc3a4" xlink:href="viv-20251231.xsd#viv_A07252025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A07252025Member_019c7271-e4c7-7104-bb00-11561bffc3a4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A08252025Member_019c7272-51c4-7623-ab1f-934b19c01a18" xlink:href="viv-20251231.xsd#viv_A08252025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A08252025Member_019c7272-51c4-7623-ab1f-934b19c01a18" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A09222025Member_019c7272-b844-7b76-8931-516cad987833" xlink:href="viv-20251231.xsd#viv_A09222025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A09222025Member_019c7272-b844-7b76-8931-516cad987833" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A10272025Member_019c7273-2d7a-7546-9062-3362937cc7c3" xlink:href="viv-20251231.xsd#viv_A10272025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A10272025Member_019c7273-2d7a-7546-9062-3362937cc7c3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A11242025Member_019c7273-8c5a-7758-8d32-d283420c2e54" xlink:href="viv-20251231.xsd#viv_A11242025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A11242025Member_019c7273-8c5a-7758-8d32-d283420c2e54" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A12292025Member_019c7274-094a-7f98-8b8e-c3cd50782b13" xlink:href="viv-20251231.xsd#viv_A12292025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2025Member_019c726c-5880-7e1c-822f-008d824c3a41" xlink:to="loc_viv_A12292025Member_019c7274-094a-7f98-8b8e-c3cd50782b13" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:href="viv-20251231.xsd#viv_A2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DividendAndInterestOnEquityApprovalDatesDomain_019c715a-578c-7775-a804-a15f974b0e90" xlink:to="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A03282024Member_019c7267-48e9-75db-ac5c-64d7e7fa370b" xlink:href="viv-20251231.xsd#viv_A03282024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A03282024Member_019c7267-48e9-75db-ac5c-64d7e7fa370b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A04292024Member_019c7267-a20c-7b8c-a1a0-74b22c70fd83" xlink:href="viv-20251231.xsd#viv_A04292024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A04292024Member_019c7267-a20c-7b8c-a1a0-74b22c70fd83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A06262024Member_019c7268-019f-7529-aee5-e1053b92d81f" xlink:href="viv-20251231.xsd#viv_A06262024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A06262024Member_019c7268-019f-7529-aee5-e1053b92d81f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A07262024Member_019c7268-cac4-7f01-9a97-71e360443367" xlink:href="viv-20251231.xsd#viv_A07262024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A07262024Member_019c7268-cac4-7f01-9a97-71e360443367" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A08262024Member_019c7269-3fe4-7791-83fd-483031943592" xlink:href="viv-20251231.xsd#viv_A08262024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A08262024Member_019c7269-3fe4-7791-83fd-483031943592" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_A12262024Member_019c7269-c4c0-76cf-9cf3-d5527a9fe653" xlink:href="viv-20251231.xsd#viv_A12262024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_A2024Member_019c726a-112c-755c-a6f5-0e5074de69ad" xlink:to="loc_viv_A12262024Member_019c7269-c4c0-76cf-9cf3-d5527a9fe653" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityGross_019c715a-578c-71ac-bd64-8f0ba578f587" xlink:href="viv-20251231.xsd#viv_InterestOnEquityGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_viv_InterestOnEquityGross_019c715a-578c-71ac-bd64-8f0ba578f587" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityNet_019c715a-578c-733c-a060-2f1b5a8f59be" xlink:href="viv-20251231.xsd#viv_InterestOnEquityNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_viv_InterestOnEquityNet_019c715a-578c-733c-a060-2f1b5a8f59be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityPerShare_019c715a-578c-73ed-b542-d7c4be6e674c" xlink:href="viv-20251231.xsd#viv_InterestOnEquityPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_viv_InterestOnEquityPerShare_019c715a-578c-73ed-b542-d7c4be6e674c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityAndIntermediateDividendsGrossAmount_019c7163-0924-7022-84ff-5285fa335965" xlink:href="viv-20251231.xsd#viv_InterestOnEquityAndIntermediateDividendsGrossAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_viv_InterestOnEquityAndIntermediateDividendsGrossAmount_019c7163-0924-7022-84ff-5285fa335965" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityAndDividendsNetOfTax_019c7163-0924-774d-b245-522f6aab9ebe" xlink:href="viv-20251231.xsd#viv_InterestOnEquityAndDividendsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c715a-578c-743f-ad35-e3f5f1aa8aed" xlink:to="loc_viv_InterestOnEquityAndDividendsNetOfTax_019c7163-0924-774d-b245-522f6aab9ebe" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EquityDetails4" xlink:type="simple" xlink:href="viv-20251231.xsd#EquityDetails4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EquityDetails4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7164-1260-7cf4-b9c5-eb9d65085e25" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7164-1260-7cf4-b9c5-eb9d65085e25" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019c7164-77f8-74d3-b2bb-4d16f2514dd9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_ifrs-full_ProfitLossAttributableToOwnersOfParent_019c7164-77f8-74d3-b2bb-4d16f2514dd9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AdjustmentsAllocationOfIncomeToLegalReserve_019c7164-77f8-7b9a-99d0-c014cc52ea2c" xlink:href="viv-20251231.xsd#viv_AdjustmentsAllocationOfIncomeToLegalReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_AdjustmentsAllocationOfIncomeToLegalReserve_019c7164-77f8-7b9a-99d0-c014cc52ea2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AdjustmentsTaxIncentivesOnCorporateIncomeTaxReturnAdjustments_019c7164-77f8-7bc9-a1d0-a6280269f0ef" xlink:href="viv-20251231.xsd#viv_AdjustmentsTaxIncentivesOnCorporateIncomeTaxReturnAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_AdjustmentsTaxIncentivesOnCorporateIncomeTaxReturnAdjustments_019c7164-77f8-7bc9-a1d0-a6280269f0ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProfitLossAfterAdjustments_019c7164-77f8-70e6-8cf1-516523e01d45" xlink:href="viv-20251231.xsd#viv_ProfitLossAfterAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_ProfitLossAfterAdjustments_019c7164-77f8-70e6-8cf1-516523e01d45" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DividendAndIOEAllocatedForTheYear_019c7164-77f8-7cf9-a76d-2ab089d38937" xlink:href="viv-20251231.xsd#viv_DividendAndIOEAllocatedForTheYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_DividendAndIOEAllocatedForTheYear_019c7164-77f8-7cf9-a76d-2ab089d38937" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityGross_019c7164-77f8-7463-accf-abe78bf1231f" xlink:href="viv-20251231.xsd#viv_InterestOnEquityGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_InterestOnEquityGross_019c7164-77f8-7463-accf-abe78bf1231f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_UnallocatedNetIncome_019c7164-77f8-741b-b9ee-ff6fe136ee6f" xlink:href="viv-20251231.xsd#viv_UnallocatedNetIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_UnallocatedNetIncome_019c7164-77f8-741b-b9ee-ff6fe136ee6f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_019c7164-77f8-752f-b4f4-981fb0a69fa1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_019c7164-77f8-752f-b4f4-981fb0a69fa1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_019c7164-77f8-72a8-a0d8-b80f0927d549" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_019c7164-77f8-72a8-a0d8-b80f0927d549" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReserveForTheShareBuybackProgram_019c7164-77f8-7ef3-9b8d-010ca84b5cd4" xlink:href="viv-20251231.xsd#viv_ReserveForTheShareBuybackProgram"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_ReserveForTheShareBuybackProgram_019c7164-77f8-7ef3-9b8d-010ca84b5cd4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeAvailableForDistribution_019c7164-77f8-75e1-b1d0-cc8b111859d4" xlink:href="viv-20251231.xsd#viv_IncomeAvailableForDistribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_IncomeAvailableForDistribution_019c7164-77f8-75e1-b1d0-cc8b111859d4" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfIncomeToAdditionalDividend_019c7164-77f8-7a2b-a5e4-cbe52017155d" xlink:href="viv-20251231.xsd#viv_AllocationOfIncomeToAdditionalDividend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_AllocationOfIncomeToAdditionalDividend_019c7164-77f8-7a2b-a5e4-cbe52017155d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TotalProposalForDistributions_019c7164-77f8-7757-8210-50dc71e09e63" xlink:href="viv-20251231.xsd#viv_TotalProposalForDistributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_TotalProposalForDistributions_019c7164-77f8-7757-8210-50dc71e09e63" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MandatoryMinimumDividend_019c7164-77f8-76b8-900c-cf04f29986af" xlink:href="viv-20251231.xsd#viv_MandatoryMinimumDividend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7164-77f8-7681-9450-a987f9684743" xlink:to="loc_viv_MandatoryMinimumDividend_019c7164-77f8-76b8-900c-cf04f29986af" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EquityDetails5" xlink:type="simple" xlink:href="viv-20251231.xsd#EquityDetails5"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EquityDetails5" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7166-0b01-760c-8e20-778e3931ee66" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7166-0b01-760c-8e20-778e3931ee66" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c7166-37c6-73b3-84f8-01c37868b935" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7166-0b01-760c-8e20-778e3931ee66" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c7166-37c6-73b3-84f8-01c37868b935" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-73b3-84f8-01c37868b935_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7166-37c6-73b3-84f8-01c37868b935" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-73b3-84f8-01c37868b935_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-74c3-8fe2-68f7a3830c37" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c7166-37c6-73b3-84f8-01c37868b935" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-74c3-8fe2-68f7a3830c37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_019c7166-37c6-7a19-b4e9-916c577c0fb6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-74c3-8fe2-68f7a3830c37" xlink:to="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslationMember_019c7166-37c6-7a19-b4e9-916c577c0fb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember_019c7166-37c6-76d0-a8fe-01356f5c0b2b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-74c3-8fe2-68f7a3830c37" xlink:to="loc_ifrs-full_ReserveOfGainsAndLossesOnFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncomeMember_019c7166-37c6-76d0-a8fe-01356f5c0b2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfCashFlowHedgesMember_019c7166-37c6-7922-be48-e1da5cc16881" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReserveOfCashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c7166-37c6-74c3-8fe2-68f7a3830c37" xlink:to="loc_ifrs-full_ReserveOfCashFlowHedgesMember_019c7166-37c6-7922-be48-e1da5cc16881" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncome_019c7166-37c6-78f0-b4af-58e37ef62cf7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AccumulatedOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncome_019c7166-37c6-78f0-b4af-58e37ef62cf7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax_019c7166-37c6-7038-9823-4db98ea45c56" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:to="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationNetOfTax_019c7166-37c6-7038-9823-4db98ea45c56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LossesOnCashFlowHedgesNetOfTax_019c7166-37c6-797c-a728-99746b29a62f" xlink:href="viv-20251231.xsd#viv_LossesOnCashFlowHedgesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:to="loc_viv_LossesOnCashFlowHedgesNetOfTax_019c7166-37c6-797c-a728-99746b29a62f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome_019c7166-37c6-72c2-b67e-c72a154bdd3e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7166-37c6-7801-bda8-925804b7d0d1" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxFinancialAssetsMeasuredAtFairValueThroughOtherComprehensiveIncome_019c7166-37c6-72c2-b67e-c72a154bdd3e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EquityDetails6" xlink:type="simple" xlink:href="viv-20251231.xsd#EquityDetails6"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EquityDetails6" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7167-62f6-7d49-90c5-3181d7b5fa4d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7167-62f6-7d49-90c5-3181d7b5fa4d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7167-d1b7-703b-bf5e-3d03ad33d657" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7167-62f6-7d49-90c5-3181d7b5fa4d" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7167-d1b7-703b-bf5e-3d03ad33d657" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7167-d1b7-703b-bf5e-3d03ad33d657_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7167-d1b7-703b-bf5e-3d03ad33d657" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7167-d1b7-703b-bf5e-3d03ad33d657_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7167-d1b7-7d74-98f6-7479e58e1908" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c7167-d1b7-703b-bf5e-3d03ad33d657" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7167-d1b7-7d74-98f6-7479e58e1908" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:href="viv-20251231.xsd#viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c7167-d1b7-7d74-98f6-7479e58e1908" xlink:to="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7c06-a004-9b0a96f5660e" xlink:href="viv-20251231.xsd#viv_TelefonicaIotBigDataETecnologiaDoBrasilSaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:to="loc_viv_TelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7c06-a004-9b0a96f5660e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivoVenturesMember_019c7167-d1b7-7bef-95ea-0d47651e6e1a" xlink:href="viv-20251231.xsd#viv_VivoVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:to="loc_viv_VivoVenturesMember_019c7167-d1b7-7bef-95ea-0d47651e6e1a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c7282-2a50-7ebc-8b29-96c22898060f" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c7282-2a50-7ebc-8b29-96c22898060f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember_019c7167-d1b7-740b-b90b-17b80bb726f0" xlink:href="viv-20251231.xsd#viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_TelefonicaCloudETecnologiaDoBrasilSaAndTelefonicaIotBigDataETecnologiaDoBrasilSaMember_019c7167-d1b7-7f19-9ca7-1a107ab669df" xlink:to="loc_viv_TelefonicaCloudETecnologiaDoBrasilCloudCoBrasilMember_019c7167-d1b7-740b-b90b-17b80bb726f0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c7167-d1b7-7e7c-b469-863d60e89102" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_ifrs-full_Equity_019c7167-d1b7-7e7c-b469-863d60e89102" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityAttributableToOwnersOfParent_019c7167-d1b7-7dac-a214-c13eb0ff2af7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_ifrs-full_EquityAttributableToOwnersOfParent_019c7167-d1b7-7dac-a214-c13eb0ff2af7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncontrollingInterests_019c7167-d1b7-75a6-8ca0-bf330ef938d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_ifrs-full_NoncontrollingInterests_019c7167-d1b7-75a6-8ca0-bf330ef938d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToOwnersOfParent_019c7167-d1b7-776d-9508-fc0d889178b8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToOwnersOfParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToOwnersOfParent_019c7167-d1b7-776d-9508-fc0d889178b8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToCapitalContributionInInvestees_019c7167-d1b7-7fce-aaa8-651c3681abde" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToCapitalContributionInInvestees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToCapitalContributionInInvestees_019c7167-d1b7-7fce-aaa8-651c3681abde" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AcquisitionsThroughBusinessCombinationsCompany_019c729f-a388-70cd-97ad-eafea25bab76" xlink:href="viv-20251231.xsd#viv_AcquisitionsThroughBusinessCombinationsCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_AcquisitionsThroughBusinessCombinationsCompany_019c729f-a388-70cd-97ad-eafea25bab76" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInEquity_019c7167-d1b7-72f0-84ab-5801795d5373" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInEquity_019c7167-d1b7-72f0-84ab-5801795d5373" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInResult_019c7167-d1b7-79e8-a2da-b27bbbe492ff" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInResult"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInOwnershipInterestsInSubsidiariesThatDoNotResultInLossOfControlEquityAttributableToMovementsInResult_019c7167-d1b7-79e8-a2da-b27bbbe492ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MergerOfCompaniesCompany_019c72a5-f5e9-798d-a90d-f640efc0095d" xlink:href="viv-20251231.xsd#viv_MergerOfCompaniesCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_MergerOfCompaniesCompany_019c72a5-f5e9-798d-a90d-f640efc0095d" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToNonControllingInterests_019c7167-d1b7-718b-a215-945472e83ca6" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInEquityAttributableToNonControllingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToNonControllingInterests_019c7167-d1b7-718b-a215-945472e83ca6" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToCapitalContributionInInvestees_019c7167-d1b7-79bb-9b5e-e9acdd92d126" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInEquityAttributableToCapitalContributionInInvestees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToCapitalContributionInInvestees_019c7167-d1b7-79bb-9b5e-e9acdd92d126" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AcquisitionsThroughBusinessCombinationsNonControllingShareholders_019c72a0-c562-792b-b68a-97c3fdc5c7b9" xlink:href="viv-20251231.xsd#viv_AcquisitionsThroughBusinessCombinationsNonControllingShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_AcquisitionsThroughBusinessCombinationsNonControllingShareholders_019c72a0-c562-792b-b68a-97c3fdc5c7b9" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInEquity_019c7167-d1b7-7c93-b957-3f937c5be7fa" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInEquity_019c7167-d1b7-7c93-b957-3f937c5be7fa" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInResult_019c7167-d1b7-7bfc-af4b-ccff5ef6555f" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInResult"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_IncreaseDecreaseThroughChangesInEquityAttributableToMovementsInResult_019c7167-d1b7-7bfc-af4b-ccff5ef6555f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MergerOfCompaniesNonControllingShareholders_019c72a7-72ae-7a9f-9c20-95df3b54317a" xlink:href="viv-20251231.xsd#viv_MergerOfCompaniesNonControllingShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7167-d1b7-78c9-ae3e-0df98a755fda" xlink:to="loc_viv_MergerOfCompaniesNonControllingShareholders_019c72a7-72ae-7a9f-9c20-95df3b54317a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c7283-f2c3-718e-bdf1-93653528fe83" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/EquityDetails7" xlink:type="simple" xlink:href="viv-20251231.xsd#EquityDetails7"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/EquityDetails7" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7169-452a-7964-80e6-54aa78f3d4da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7169-03fb-719f-9de5-af865ab9a542" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7169-452a-7964-80e6-54aa78f3d4da" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_019c7169-03fb-719f-9de5-af865ab9a542" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_019c7169-452a-7975-8383-a697f72cdddb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7169-452a-7964-80e6-54aa78f3d4da" xlink:to="loc_ifrs-full_ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity_019c7169-452a-7975-8383-a697f72cdddb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageShares_019c7169-452a-7f3d-9053-d5bf7fcc4615" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7169-452a-7964-80e6-54aa78f3d4da" xlink:to="loc_ifrs-full_WeightedAverageShares_019c7169-452a-7f3d-9053-d5bf7fcc4615" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BasicEarningsLossPerShare_019c7169-452a-73e1-b7fb-9778aa2b4af5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BasicEarningsLossPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_019c7169-452a-7964-80e6-54aa78f3d4da" xlink:to="loc_ifrs-full_BasicEarningsLossPerShare_019c7169-452a-73e1-b7fb-9778aa2b4af5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/NETOPERATINGREVENUEDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#NETOPERATINGREVENUEDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/NETOPERATINGREVENUEDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c4274-2dac-7a4b-bb8a-efc9a7887199" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c4274-2dac-7a4b-bb8a-efc9a7887199" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesAxis_019c4274-2dac-7967-a8e7-6720fe7f6e86" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_019c4274-2dac-7a4b-bb8a-efc9a7887199" xlink:to="loc_ifrs-full_ProductsAndServicesAxis_019c4274-2dac-7967-a8e7-6720fe7f6e86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7967-a8e7-6720fe7f6e86_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c4274-2dac-7967-a8e7-6720fe7f6e86" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7967-a8e7-6720fe7f6e86_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7992-b1b3-a829c656e2c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_019c4274-2dac-7967-a8e7-6720fe7f6e86" xlink:to="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7992-b1b3-a829c656e2c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ServicesMember_019c4274-2dac-789a-9b42-f2082a77bf2a" xlink:href="viv-20251231.xsd#viv_ServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7992-b1b3-a829c656e2c8" xlink:to="loc_viv_ServicesMember_019c4274-2dac-789a-9b42-f2082a77bf2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SaleOfGoodsMember_019c4274-2dac-77a6-ac9f-bce00d9b0fa5" xlink:href="viv-20251231.xsd#viv_SaleOfGoodsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesDomain_019c4274-2dac-7992-b1b3-a829c656e2c8" xlink:to="loc_viv_SaleOfGoodsMember_019c4274-2dac-77a6-ac9f-bce00d9b0fa5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GrossOperatingRevenue_019c4274-2dac-7954-8fc0-87b336305477" xlink:href="viv-20251231.xsd#viv_GrossOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_GrossOperatingRevenue_019c4274-2dac-7954-8fc0-87b336305477" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeductionsFromGrossOperatingRevenue_019c4274-2dac-7b7f-bb42-2cca9ae21ed3" xlink:href="viv-20251231.xsd#viv_DeductionsFromGrossOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_DeductionsFromGrossOperatingRevenue_019c4274-2dac-7b7f-bb42-2cca9ae21ed3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxOnOperatingRevenue_019c4274-2dac-7100-9e10-acc0c8bd85bb" xlink:href="viv-20251231.xsd#viv_TaxOnOperatingRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_TaxOnOperatingRevenue_019c4274-2dac-7100-9e10-acc0c8bd85bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DiscountOnSalesAndReturnOfGoods_019c4274-2dac-7834-a97f-bce2a2508796" xlink:href="viv-20251231.xsd#viv_DiscountOnSalesAndReturnOfGoods"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_DiscountOnSalesAndReturnOfGoods_019c4274-2dac-7834-a97f-bce2a2508796" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2dac-7c93-acb8-c1c91bfa5d92" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromRenderingOfTelecommunicationServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_ifrs-full_RevenueFromRenderingOfTelecommunicationServices_019c4274-2dac-7c93-acb8-c1c91bfa5d92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmountRefundedToCustomers_019c4274-2dac-76ae-9bcf-ea0aab87242c" xlink:href="viv-20251231.xsd#viv_AmountRefundedToCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_AmountRefundedToCustomers_019c4274-2dac-76ae-9bcf-ea0aab87242c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfGrossOperatingRevenuesCostumerContribution_019c4274-2dac-7b79-8388-4b43dd5f6712" xlink:href="viv-20251231.xsd#viv_PercentageOfGrossOperatingRevenuesCostumerContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_019c4274-2dac-74a9-a89d-51b16739066a" xlink:to="loc_viv_PercentageOfGrossOperatingRevenuesCostumerContribution_019c4274-2dac-7b79-8388-4b43dd5f6712" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OPERATINGCOSTSANDEXPENSESDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#OPERATINGCOSTSANDEXPENSESDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OPERATINGCOSTSANDEXPENSESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c4274-2dac-7e98-a37b-787633d70a98" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c4274-2dac-7e98-a37b-787633d70a98" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c4274-2dac-7e5d-a03a-5862eb430f0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionTable_019c4274-2dac-7e98-a37b-787633d70a98" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c4274-2dac-7e5d-a03a-5862eb430f0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-7e5d-a03a-5862eb430f0a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c4274-2dac-7e5d-a03a-5862eb430f0a" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-7e5d-a03a-5862eb430f0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-78a2-9439-a09850993549" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionAxis_019c4274-2dac-7e5d-a03a-5862eb430f0a" xlink:to="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-78a2-9439-a09850993549" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CostOfSalesAndServicesMember_019c4274-2dac-7e19-aa12-9daa37e05d92" xlink:href="viv-20251231.xsd#viv_CostOfSalesAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-78a2-9439-a09850993549" xlink:to="loc_viv_CostOfSalesAndServicesMember_019c4274-2dac-7e19-aa12-9daa37e05d92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsSellingAndMarketingExpenseMember_019c4274-2dac-7787-bc6b-468af698d946" xlink:href="viv-20251231.xsd#viv_IfrsSellingAndMarketingExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-78a2-9439-a09850993549" xlink:to="loc_viv_IfrsSellingAndMarketingExpenseMember_019c4274-2dac-7787-bc6b-468af698d946" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGeneralAndAdministrativeExpenseMember_019c4274-2dac-7057-a324-1a1e43eef928" xlink:href="viv-20251231.xsd#viv_IfrsGeneralAndAdministrativeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AttributionOfExpensesByNatureToTheirFunctionDomain_019c4274-2dac-78a2-9439-a09850993549" xlink:to="loc_viv_IfrsGeneralAndAdministrativeExpenseMember_019c4274-2dac-7057-a324-1a1e43eef928" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ThirdPartyServicesExpenses_019c4274-2dac-7801-b1d0-245a51c6205e" xlink:href="viv-20251231.xsd#viv_ThirdPartyServicesExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_ThirdPartyServicesExpenses_019c4274-2dac-7801-b1d0-245a51c6205e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationAndAmortisationExpense_019c4274-2dac-7130-807e-00d26d8ef55a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DepreciationAndAmortisationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_ifrs-full_DepreciationAndAmortisationExpense_019c4274-2dac-7130-807e-00d26d8ef55a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EmployeeBenefitsExpense_019c4274-2dac-7e91-8b41-886b0d703987" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EmployeeBenefitsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_ifrs-full_EmployeeBenefitsExpense_019c4274-2dac-7e91-8b41-886b0d703987" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CostRelatingToGoodsSold_019c4274-2dac-7c4c-a4bb-d58c056873fb" xlink:href="viv-20251231.xsd#viv_CostRelatingToGoodsSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_CostRelatingToGoodsSold_019c4274-2dac-7c4c-a4bb-d58c056873fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxesChargesAndContributionsExpense_019c4274-2dac-7538-a910-83186741ccb8" xlink:href="viv-20251231.xsd#viv_TaxesChargesAndContributionsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_TaxesChargesAndContributionsExpense_019c4274-2dac-7538-a910-83186741ccb8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RentalInsuranceCondominiumAndConnectionMeansExpenses_019c4274-2dac-7a1d-82f6-a7973eb9462f" xlink:href="viv-20251231.xsd#viv_RentalInsuranceCondominiumAndConnectionMeansExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_RentalInsuranceCondominiumAndConnectionMeansExpenses_019c4274-2dac-7a1d-82f6-a7973eb9462f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedImpairmentLossesOnAccountsReceivable_019c4274-2dac-75e5-9c67-1a4558e01486" xlink:href="viv-20251231.xsd#viv_EstimatedImpairmentLossesOnAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_EstimatedImpairmentLossesOnAccountsReceivable_019c4274-2dac-75e5-9c67-1a4558e01486" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaterialAndOtherOperatingCostsAndExpenses_019c4274-2dac-7f1f-9779-b605223ae69c" xlink:href="viv-20251231.xsd#viv_MaterialAndOtherOperatingCostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_viv_MaterialAndOtherOperatingCostsAndExpenses_019c4274-2dac-7f1f-9779-b605223ae69c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OperatingExpense_019c4274-2dac-7e77-9571-ea0458ab3cbb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAttributionOfExpensesByNatureToTheirFunctionLineItems_019c4274-2dac-7b8a-ae17-7935735804d1" xlink:to="loc_ifrs-full_OperatingExpense_019c4274-2dac-7e77-9571-ea0458ab3cbb" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/OTHEROPERATINGINCOMENETDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#OTHEROPERATINGINCOMENETDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/OTHEROPERATINGINCOMENETDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:href="viv-20251231.xsd#viv_OTHEROPERATINGINCOMEEXPENSESLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OTHEROPERATINGINCOMEEXPENSESTable_019c4432-6d7c-729b-9df1-9b3bd5944203" xlink:href="viv-20251231.xsd#viv_OTHEROPERATINGINCOMEEXPENSESTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_viv_OTHEROPERATINGINCOMEEXPENSESTable_019c4432-6d7c-729b-9df1-9b3bd5944203" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4433-12f2-7333-9555-559d6284358f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESTable_019c4432-6d7c-729b-9df1-9b3bd5944203" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4433-12f2-7333-9555-559d6284358f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-12f2-7333-9555-559d6284358f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4433-12f2-7333-9555-559d6284358f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-12f2-7333-9555-559d6284358f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-3883-7d0d-9eba-6f274187e00a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c4433-12f2-7333-9555-559d6284358f" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-3883-7d0d-9eba-6f274187e00a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4433-8555-7c83-83fb-a60a6bdbf03b" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-3883-7d0d-9eba-6f274187e00a" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaS.a.Member_019c4433-8555-7c83-83fb-a60a6bdbf03b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_VivaEAndVivoVenturesMember_019c4433-afd3-7e9f-a8c4-f6f1858be7f3" xlink:href="viv-20251231.xsd#viv_VivaEAndVivoVenturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c4433-3883-7d0d-9eba-6f274187e00a" xlink:to="loc_viv_VivaEAndVivoVenturesMember_019c4433-afd3-7e9f-a8c4-f6f1858be7f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReversalOfRegulatoryProvisionsDueToTheCommitmentTermRegardingSelfCompositionNegotiationsForAdaptationOfConcessionContracts_019c4274-2dac-76fa-87ad-e576ff2ef15c" xlink:href="viv-20251231.xsd#viv_ReversalOfRegulatoryProvisionsDueToTheCommitmentTermRegardingSelfCompositionNegotiationsForAdaptationOfConcessionContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_viv_ReversalOfRegulatoryProvisionsDueToTheCommitmentTermRegardingSelfCompositionNegotiationsForAdaptationOfConcessionContracts_019c4274-2dac-76fa-87ad-e576ff2ef15c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReversalOfExpensesOfProvisionsForLegalClaims_019c4274-2dac-7539-9102-ef809e62c14c" xlink:href="viv-20251231.xsd#viv_ReversalOfExpensesOfProvisionsForLegalClaims"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_viv_ReversalOfExpensesOfProvisionsForLegalClaims_019c4274-2dac-7539-9102-ef809e62c14c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReversalOfPartOfTheRemainingArisingFromTheAgreementInRelationToThePostClosingAdjustment_019c4274-2dac-721b-aea0-df5530898dd7" xlink:href="viv-20251231.xsd#viv_ReversalOfPartOfTheRemainingArisingFromTheAgreementInRelationToThePostClosingAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_viv_ReversalOfPartOfTheRemainingArisingFromTheAgreementInRelationToThePostClosingAdjustment_019c4274-2dac-721b-aea0-df5530898dd7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageReferringToTheReversalOfRemainingPartsResultingFromTheAgreementInRelationToThePostClosingAdjustment_019c4274-2dac-7d45-9dad-f975c0a561e5" xlink:href="viv-20251231.xsd#viv_PercentageReferringToTheReversalOfRemainingPartsResultingFromTheAgreementInRelationToThePostClosingAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_viv_PercentageReferringToTheReversalOfRemainingPartsResultingFromTheAgreementInRelationToThePostClosingAdjustment_019c4274-2dac-7d45-9dad-f975c0a561e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination_019c442b-5537-7917-8723-0651baddaec6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OTHEROPERATINGINCOMEEXPENSESLineItems_019c4432-9176-7406-8fda-e46242620de0" xlink:to="loc_ifrs-full_GainLossRecognisedAsResultOfRemeasuringToFairValueEquityInterestInAcquireeHeldByAcquirerBeforeBusinessCombination_019c442b-5537-7917-8723-0651baddaec6" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINCOMEEXPENSESDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINCOMEEXPENSESDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINCOMEEXPENSESDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:href="viv-20251231.xsd#viv_FINANCIALINCOMEEXPENSESLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FINANCIALINCOMEEXPENSESTable_019c4455-a15f-7aeb-9f85-7f2d4cf3787d" xlink:href="viv-20251231.xsd#viv_FINANCIALINCOMEEXPENSESTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_FINANCIALINCOMEEXPENSESTable_019c4455-a15f-7aeb-9f85-7f2d4cf3787d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c4456-1fa1-78ac-979e-8db391782921" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESTable_019c4455-a15f-7aeb-9f85-7f2d4cf3787d" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c4456-1fa1-78ac-979e-8db391782921" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4456-1fa1-78ac-979e-8db391782921_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4456-1fa1-78ac-979e-8db391782921" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4456-1fa1-78ac-979e-8db391782921_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4456-7925-77d9-b113-d0dc4ce77fcd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4456-1fa1-78ac-979e-8db391782921" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4456-7925-77d9-b113-d0dc4ce77fcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c4456-c41a-7938-a673-a2250bd9e671" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4456-7925-77d9-b113-d0dc4ce77fcd" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c4456-c41a-7938-a673-a2250bd9e671" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ForeignExchangeGain_019c4274-2dac-712f-8191-3ebad7367e9f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ForeignExchangeGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_ForeignExchangeGain_019c4274-2dac-712f-8191-3ebad7367e9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InvestmentIncome_019c4274-2dac-7360-91b9-ae96dba9e5ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_InvestmentIncome_019c4274-2dac-7360-91b9-ae96dba9e5ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsOnChangeInFairValueOfDerivatives_019c4274-2dac-79b7-a218-38e5dd78c64b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_GainsOnChangeInFairValueOfDerivatives_019c4274-2dac-79b7-a218-38e5dd78c64b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromInterest_019c4274-2dac-7aff-8f05-7d780d7811ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RevenueFromInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_RevenueFromInterest_019c4274-2dac-7aff-8f05-7d780d7811ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c4274-2dac-7478-81f9-3c9965a69886" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_GainsLossesOnExchangeDifferencesOnTranslationRecognisedInProfitOrLoss_019c4274-2dac-7478-81f9-3c9965a69886" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherFinanceIncome_019c4274-2dac-79b4-b97a-3b542c05c8c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherFinanceIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_OtherFinanceIncome_019c4274-2dac-79b4-b97a-3b542c05c8c6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncome_019c4274-2dac-7ad3-bfd2-f1772221cdc5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_FinanceIncome_019c4274-2dac-7ad3-bfd2-f1772221cdc5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRevenueExpense_019c4274-2dac-73cc-938b-d71a4f8fb0c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestRevenueExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_InterestRevenueExpense_019c4274-2dac-73cc-938b-d71a4f8fb0c8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ExpensesWithMonetaryVariationsOfProvisionsForContingencies_019c4274-2dac-7f54-afd7-99b0c01da7a1" xlink:href="viv-20251231.xsd#viv_ExpensesWithMonetaryVariationsOfProvisionsForContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_ExpensesWithMonetaryVariationsOfProvisionsForContingencies_019c4274-2dac-7f54-afd7-99b0c01da7a1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LossesOnChangeInFairValueOfDerivatives_019c4274-2dac-7fbe-b958-b323a1bc0b65" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LossesOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_LossesOnChangeInFairValueOfDerivatives_019c4274-2dac-7fbe-b958-b323a1bc0b65" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestExpensesOnPayable_019c4274-2dac-7bf0-961c-d482ba06e38b" xlink:href="viv-20251231.xsd#viv_InterestExpensesOnPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_InterestExpensesOnPayable_019c4274-2dac-7bf0-961c-d482ba06e38b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ExpensesOnForeignExchangeVariationsOnLoansAndFinancing_019c4274-2dac-7758-a7e2-5e3ecf651336" xlink:href="viv-20251231.xsd#viv_ExpensesOnForeignExchangeVariationsOnLoansAndFinancing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_ExpensesOnForeignExchangeVariationsOnLoansAndFinancing_019c4274-2dac-7758-a7e2-5e3ecf651336" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherExpensesOnForeignExchangeAndMonetaryVariation_019c4274-2dac-7e6e-9c92-04ef82225a42" xlink:href="viv-20251231.xsd#viv_OtherExpensesOnForeignExchangeAndMonetaryVariation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_OtherExpensesOnForeignExchangeAndMonetaryVariation_019c4274-2dac-7e6e-9c92-04ef82225a42" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherFinanceCost_019c4274-2dac-79e3-b4fd-752b5d311142" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherFinanceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_OtherFinanceCost_019c4274-2dac-79e3-b4fd-752b5d311142" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceCosts_019c4274-2dac-7701-8355-fb7c830384ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_FinanceCosts_019c4274-2dac-7701-8355-fb7c830384ea" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinanceIncomeCost_019c4274-2dac-72aa-9ba8-54b7f475189a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinanceIncomeCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_ifrs-full_FinanceIncomeCost_019c4274-2dac-72aa-9ba8-54b7f475189a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxCreditsForPisAndCofins_019c4274-2dac-7729-8b70-329ec1bd7785" xlink:href="viv-20251231.xsd#viv_TaxCreditsForPisAndCofins"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_TaxCreditsForPisAndCofins_019c4274-2dac-7729-8b70-329ec1bd7785" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LeaseCharges_019c4274-2dac-71c3-9a82-2fc5b5228a6e" xlink:href="viv-20251231.xsd#viv_LeaseCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_LeaseCharges_019c4274-2dac-71c3-9a82-2fc5b5228a6e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReversalOfTheMonetaryUpdateOfRegulatoryProvisions_019c4274-2dac-7c67-bc76-b0d912904c06" xlink:href="viv-20251231.xsd#viv_ReversalOfTheMonetaryUpdateOfRegulatoryProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_ReversalOfTheMonetaryUpdateOfRegulatoryProvisions_019c4274-2dac-7c67-bc76-b0d912904c06" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReversalOfExpensesWithMonetaryUpdatingOfProvisionsForLegalClaimsDueToAdherenceToTaxAmnestyPrograms_019c4274-2dac-7821-bc70-067332809818" xlink:href="viv-20251231.xsd#viv_ReversalOfExpensesWithMonetaryUpdatingOfProvisionsForLegalClaimsDueToAdherenceToTaxAmnestyPrograms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_FINANCIALINCOMEEXPENSESLineItems_019c4457-5014-7573-8b63-9f9c935bce52" xlink:to="loc_viv_ReversalOfExpensesWithMonetaryUpdatingOfProvisionsForLegalClaimsDueToAdherenceToTaxAmnestyPrograms_019c4274-2dac-7821-bc70-067332809818" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7942-99c4-46ad346ec32d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7942-99c4-46ad346ec32d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-7bee-816b-dd1005eafd20" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7942-99c4-46ad346ec32d" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-7bee-816b-dd1005eafd20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-7bee-816b-dd1005eafd20_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-7bee-816b-dd1005eafd20" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-7bee-816b-dd1005eafd20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-702b-b516-d8fccdeb207a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-7bee-816b-dd1005eafd20" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-702b-b516-d8fccdeb207a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_019c4274-2dac-7128-9b02-038999ad90f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-702b-b516-d8fccdeb207a" xlink:to="loc_ifrs-full_ParentMember_019c4274-2dac-7128-9b02-038999ad90f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaChileS.a.Member_019c4274-2dac-7060-a061-3c42683d34d1" xlink:href="viv-20251231.xsd#viv_TelefonicaChileS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7128-9b02-038999ad90f6" xlink:to="loc_viv_TelefonicaChileS.a.Member_019c4274-2dac-7060-a061-3c42683d34d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4274-2dac-7bd0-ada7-b1606333de57" xlink:href="viv-20251231.xsd#viv_TelefonicaLatinoamericaHoldingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7128-9b02-038999ad90f6" xlink:to="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4274-2dac-7bd0-ada7-b1606333de57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaS.a.Member_019c4274-2dac-7ed6-b580-0d91029ac641" xlink:href="viv-20251231.xsd#viv_TelefonicaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7128-9b02-038999ad90f6" xlink:to="loc_viv_TelefonicaS.a.Member_019c4274-2dac-7ed6-b580-0d91029ac641" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:href="viv-20251231.xsd#viv_OtherGroupCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-702b-b516-d8fccdeb207a" xlink:to="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4274-2dac-71ff-a25d-5b6ca6c9a978" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalSolutionsParticipacoesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4274-2dac-71ff-a25d-5b6ca6c9a978" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaVenezolanaMember_019c4274-2dac-7596-a0a4-f95b2ba9b315" xlink:href="viv-20251231.xsd#viv_TelefonicaVenezolanaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaVenezolanaMember_019c4274-2dac-7596-a0a4-f95b2ba9b315" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TerraNetworksMexicoMember_019c48d7-7b60-7ed6-bc1d-2f6fa3045b9c" xlink:href="viv-20251231.xsd#viv_TerraNetworksMexicoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TerraNetworksMexicoMember_019c48d7-7b60-7ed6-bc1d-2f6fa3045b9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaGlobalSolutionsMember_019c4274-2dac-745b-9fbc-8c45a5899a50" xlink:href="viv-20251231.xsd#viv_TelefnicaGlobalSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefnicaGlobalSolutionsMember_019c4274-2dac-745b-9fbc-8c45a5899a50" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaInnovacionDigitalMember_019c4274-2dac-74fb-bcd7-c885f79bede9" xlink:href="viv-20251231.xsd#viv_TelefonicaInnovacionDigitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaInnovacionDigitalMember_019c4274-2dac-74fb-bcd7-c885f79bede9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaMovilesArgentinaMember_019c48d8-cefd-7e72-abfe-dc106ef17e18" xlink:href="viv-20251231.xsd#viv_TelefonicaMovilesArgentinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaMovilesArgentinaMember_019c48d8-cefd-7e72-abfe-dc106ef17e18" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelfisaGlobalBvMember_019c48dd-7254-787c-abc6-d036cc20c4a7" xlink:href="viv-20251231.xsd#viv_TelfisaGlobalBvMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelfisaGlobalBvMember_019c48dd-7254-787c-abc6-d036cc20c4a7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelxiusCableBrasilMember_019c4274-2dac-7026-ae37-f1ad155e08f6" xlink:href="viv-20251231.xsd#viv_TelxiusCableBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelxiusCableBrasilMember_019c4274-2dac-7026-ae37-f1ad155e08f6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c48e7-fa25-7416-9041-38e5e2ee6725" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c48e7-fa25-7416-9041-38e5e2ee6725" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CelularDeTelefoniaMember_019c48e9-0ecc-7ce5-a191-24c6acc2039d" xlink:href="viv-20251231.xsd#viv_CelularDeTelefoniaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_CelularDeTelefoniaMember_019c48e9-0ecc-7ce5-a191-24c6acc2039d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c48eb-a46d-78b6-b19c-17346b19bb52" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c48eb-a46d-78b6-b19c-17346b19bb52" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_T.IotBigDataTechEspMember_019c48fc-0407-7e21-bb9e-82a6f615a0d4" xlink:href="viv-20251231.xsd#viv_T.IotBigDataTechEspMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_T.IotBigDataTechEspMember_019c48fc-0407-7e21-bb9e-82a6f615a0d4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaHispanoamericaMember_019c48fc-d7cb-7148-9e6a-e8d6ac5a5f29" xlink:href="viv-20251231.xsd#viv_TelefonicaHispanoamericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaHispanoamericaMember_019c48fc-d7cb-7148-9e6a-e8d6ac5a5f29" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaMovilesDelUruguayMember_019c48ff-e1c8-76a8-ae59-4d02a0bd0e1f" xlink:href="viv-20251231.xsd#viv_TelefonicaMovilesDelUruguayMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_viv_TelefonicaMovilesDelUruguayMember_019c48ff-e1c8-76a8-ae59-4d02a0bd0e1f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherRelatedPartiesMember_019c4900-1131-7179-8dd5-98fa872af67a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7772-be3e-672c39f0d7fc" xlink:to="loc_ifrs-full_OtherRelatedPartiesMember_019c4900-1131-7179-8dd5-98fa872af67a" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashAndCashEquivalentsRelatedPartyTransactions_019c4274-2dac-7c8b-9976-a9d451089316" xlink:href="viv-20251231.xsd#viv_CashAndCashEquivalentsRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_CashAndCashEquivalentsRelatedPartyTransactions_019c4274-2dac-7c8b-9976-a9d451089316" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeReceivablesDueFromRelatedParties_019c4274-2dac-780a-b458-9be1f185255f" xlink:href="viv-20251231.xsd#viv_TradeReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_TradeReceivablesDueFromRelatedParties_019c4274-2dac-780a-b458-9be1f185255f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherReceivablesDueFromRelatedParties_019c4274-2dac-74b8-822e-c0f087dfb625" xlink:href="viv-20251231.xsd#viv_OtherReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_OtherReceivablesDueFromRelatedParties_019c4274-2dac-74b8-822e-c0f087dfb625" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalents_019c495e-d31c-7c73-b860-481946e4fabf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_ifrs-full_CashAndCashEquivalents_019c495e-d31c-7c73-b860-481946e4fabf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashAndCashEquivalentsCurrentRelatedPartyTransactions_019c44fe-95e3-7270-8cec-e34f23739532" xlink:href="viv-20251231.xsd#viv_CashAndCashEquivalentsCurrentRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_CashAndCashEquivalentsCurrentRelatedPartyTransactions_019c44fe-95e3-7270-8cec-e34f23739532" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradeReceivablesDueFromRelatedPartiesCurrent_019c44ff-dc18-7e1c-a510-790664a3a0f7" xlink:href="viv-20251231.xsd#viv_TradeReceivablesDueFromRelatedPartiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_TradeReceivablesDueFromRelatedPartiesCurrent_019c44ff-dc18-7e1c-a510-790664a3a0f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentReceivablesDueFromRelatedParties_019c4274-2dac-7e94-a1f2-42b1c17978d2" xlink:href="viv-20251231.xsd#viv_OtherCurrentReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_OtherCurrentReceivablesDueFromRelatedParties_019c4274-2dac-7e94-a1f2-42b1c17978d2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNoncurrentReceivablesDueFromRelatedParties_019c4274-2dac-76dd-827f-cd47c6d9c783" xlink:href="viv-20251231.xsd#viv_OtherNoncurrentReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-752a-8fb5-c33d037a89c7" xlink:to="loc_viv_OtherNoncurrentReceivablesDueFromRelatedParties_019c4274-2dac-76dd-827f-cd47c6d9c783" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESBalanceSheetDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4881-65d9-7787-8850-3fb8449d1b77" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4881-65d9-7787-8850-3fb8449d1b77" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4881-65d9-7e1b-9f79-a86698be6bd0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4881-65d9-7787-8850-3fb8449d1b77" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4881-65d9-7e1b-9f79-a86698be6bd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-7e1b-9f79-a86698be6bd0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4881-65d9-7e1b-9f79-a86698be6bd0" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-7e1b-9f79-a86698be6bd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-741a-a41e-24ead9df6421" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4881-65d9-7e1b-9f79-a86698be6bd0" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-741a-a41e-24ead9df6421" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_019c4881-65d9-78f4-be86-361d19a183cd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-741a-a41e-24ead9df6421" xlink:to="loc_ifrs-full_ParentMember_019c4881-65d9-78f4-be86-361d19a183cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaChileS.a.Member_019c4881-65d9-7da8-9e25-ed20951b7089" xlink:href="viv-20251231.xsd#viv_TelefonicaChileS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4881-65d9-78f4-be86-361d19a183cd" xlink:to="loc_viv_TelefonicaChileS.a.Member_019c4881-65d9-7da8-9e25-ed20951b7089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4881-65d9-7a10-b1a4-8abafcec9334" xlink:href="viv-20251231.xsd#viv_TelefonicaLatinoamericaHoldingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4881-65d9-78f4-be86-361d19a183cd" xlink:to="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4881-65d9-7a10-b1a4-8abafcec9334" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaS.a.Member_019c4881-65d9-7bb1-a8f3-71c2a4e5f512" xlink:href="viv-20251231.xsd#viv_TelefonicaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4881-65d9-78f4-be86-361d19a183cd" xlink:to="loc_viv_TelefonicaS.a.Member_019c4881-65d9-7bb1-a8f3-71c2a4e5f512" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:href="viv-20251231.xsd#viv_OtherGroupCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4881-65d9-741a-a41e-24ead9df6421" xlink:to="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4881-65d9-7b7f-9f5e-3fc90ea209be" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalSolutionsParticipacoesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4881-65d9-7b7f-9f5e-3fc90ea209be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaComprasElectronicasMember_019c488b-dbf7-71a5-b16c-a6c7e80e5b93" xlink:href="viv-20251231.xsd#viv_TelefonicaComprasElectronicasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefonicaComprasElectronicasMember_019c488b-dbf7-71a5-b16c-a6c7e80e5b93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaInnovacionDigitalMember_019c4881-65d9-76e9-b125-2deace4ac6a3" xlink:href="viv-20251231.xsd#viv_TelefonicaInnovacionDigitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefonicaInnovacionDigitalMember_019c4881-65d9-76e9-b125-2deace4ac6a3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaVenezolanaMember_019c4890-0902-7df5-9ae6-1baf355d0164" xlink:href="viv-20251231.xsd#viv_TelefonicaVenezolanaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefonicaVenezolanaMember_019c4890-0902-7df5-9ae6-1baf355d0164" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaGlobalSolutionsMember_019c4881-65d9-7859-9554-8efb50e5f35b" xlink:href="viv-20251231.xsd#viv_TelefnicaGlobalSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefnicaGlobalSolutionsMember_019c4881-65d9-7859-9554-8efb50e5f35b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelxiusCableBrasilMember_019c4892-fb05-793f-9fcc-0293f3cc072d" xlink:href="viv-20251231.xsd#viv_TelxiusCableBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelxiusCableBrasilMember_019c4892-fb05-793f-9fcc-0293f3cc072d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaAixParticipacoesMember_019c4881-65d9-7d7b-b89d-58df2ff5c752" xlink:href="viv-20251231.xsd#viv_CompanhiaAixParticipacoesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_CompanhiaAixParticipacoesMember_019c4881-65d9-7d7b-b89d-58df2ff5c752" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_T.IotBigDataTechEspMember_019c4881-65d9-73cf-8e1a-3b1b6e1c970f" xlink:href="viv-20251231.xsd#viv_T.IotBigDataTechEspMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_T.IotBigDataTechEspMember_019c4881-65d9-73cf-8e1a-3b1b6e1c970f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c48ba-9167-7eb1-9588-7b66ba371512" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c48ba-9167-7eb1-9588-7b66ba371512" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c4881-65d9-7c24-909d-359f3b85f003" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c4881-65d9-7c24-909d-359f3b85f003" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherRelatedPartiesMember_019c4881-65d9-78d4-9ee1-3c677221de90" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4881-65d9-72be-a6e3-8a74c08f882a" xlink:to="loc_ifrs-full_OtherRelatedPartiesMember_019c4881-65d9-78d4-9ee1-3c677221de90" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradePayablesToRelatedParties_019c4881-65d9-76d1-936a-b3e4ee4f752f" xlink:href="viv-20251231.xsd#viv_TradePayablesToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_TradePayablesToRelatedParties_019c4881-65d9-76d1-936a-b3e4ee4f752f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherLiabilitiesAndLeasePayablesToRelatedParties_019c4881-65d9-7fd2-9098-7971c3953ca8" xlink:href="viv-20251231.xsd#viv_OtherLiabilitiesAndLeasePayablesToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_OtherLiabilitiesAndLeasePayablesToRelatedParties_019c4881-65d9-7fd2-9098-7971c3953ca8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradePayablesAndOtherPayablesToRelatedPartiesCurrent_019c4881-65d9-79c5-a9dc-96fba0e95df8" xlink:href="viv-20251231.xsd#viv_TradePayablesAndOtherPayablesToRelatedPartiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_TradePayablesAndOtherPayablesToRelatedPartiesCurrent_019c4881-65d9-79c5-a9dc-96fba0e95df8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LeaseLiabilitiesRelatedPartiesCurrent_019c4881-65d9-7e2b-8791-2d84663ae4e0" xlink:href="viv-20251231.xsd#viv_LeaseLiabilitiesRelatedPartiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_LeaseLiabilitiesRelatedPartiesCurrent_019c4881-65d9-7e2b-8791-2d84663ae4e0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LeaseLiabilitiesRelatedPartiesNoncurrent_019c4881-65d9-74fa-949f-36eb84e9892a" xlink:href="viv-20251231.xsd#viv_LeaseLiabilitiesRelatedPartiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_LeaseLiabilitiesRelatedPartiesNoncurrent_019c4881-65d9-74fa-949f-36eb84e9892a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCurrentPayablesToRelatedParties_019c4881-65d9-755f-9a0e-17e41331a6bb" xlink:href="viv-20251231.xsd#viv_OtherCurrentPayablesToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_OtherCurrentPayablesToRelatedParties_019c4881-65d9-755f-9a0e-17e41331a6bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherNoncurrentPayablesToRelatedParties_019c4881-65d9-7a72-a00d-32fda03f5b7a" xlink:href="viv-20251231.xsd#viv_OtherNoncurrentPayablesToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4881-65d9-7a99-9cab-eeac025df265" xlink:to="loc_viv_OtherNoncurrentPayablesToRelatedParties_019c4881-65d9-7a72-a00d-32fda03f5b7a" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESIncomeStatementDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#BALANCESANDTRANSACTIONSWITHRELATEDPARTIESIncomeStatementDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/BALANCESANDTRANSACTIONSWITHRELATEDPARTIESIncomeStatementDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-7efe-8623-3638daa472fc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7494-9e5b-bba8e3932080" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-7efe-8623-3638daa472fc" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7494-9e5b-bba8e3932080" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-79c6-9198-536047aecb09" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_019c4274-2dac-7494-9e5b-bba8e3932080" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-79c6-9198-536047aecb09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-79c6-9198-536047aecb09_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-79c6-9198-536047aecb09" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-79c6-9198-536047aecb09_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-76f6-bc61-fd0aa61be503" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfRelatedPartiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_019c4274-2dac-79c6-9198-536047aecb09" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-76f6-bc61-fd0aa61be503" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_019c4274-2dac-7d68-b971-b78863c9bffa" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-76f6-bc61-fd0aa61be503" xlink:to="loc_ifrs-full_ParentMember_019c4274-2dac-7d68-b971-b78863c9bffa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaChileS.a.Member_019c4274-2dac-7c24-9e48-601a788a43da" xlink:href="viv-20251231.xsd#viv_TelefonicaChileS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7d68-b971-b78863c9bffa" xlink:to="loc_viv_TelefonicaChileS.a.Member_019c4274-2dac-7c24-9e48-601a788a43da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4274-2dac-711f-ae12-387a0c8afc22" xlink:href="viv-20251231.xsd#viv_TelefonicaLatinoamericaHoldingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7d68-b971-b78863c9bffa" xlink:to="loc_viv_TelefonicaLatinoamericaHoldingMember_019c4274-2dac-711f-ae12-387a0c8afc22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaS.a.Member_019c4274-2dac-79fb-8fd3-e090470f282a" xlink:href="viv-20251231.xsd#viv_TelefonicaS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ParentMember_019c4274-2dac-7d68-b971-b78863c9bffa" xlink:to="loc_viv_TelefonicaS.a.Member_019c4274-2dac-79fb-8fd3-e090470f282a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:href="viv-20251231.xsd#viv_OtherGroupCompaniesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesDomain_019c4274-2dac-76f6-bc61-fd0aa61be503" xlink:to="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4274-2dac-762e-992e-d957738d7238" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalSolutionsParticipacoesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefonicaGlobalSolutionsParticipacoesMember_019c4274-2dac-762e-992e-d957738d7238" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaMovilesArgentinaMember_019c4274-2dac-7595-bc19-70048e0435fd" xlink:href="viv-20251231.xsd#viv_TelefonicaMovilesArgentinaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefonicaMovilesArgentinaMember_019c4274-2dac-7595-bc19-70048e0435fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaInnovacionDigitalMember_019c4274-2dac-775c-8ecd-abec4d6ba5b0" xlink:href="viv-20251231.xsd#viv_TelefonicaInnovacionDigitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefonicaInnovacionDigitalMember_019c4274-2dac-775c-8ecd-abec4d6ba5b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaGlobalTechnologyMember_019c4274-2dac-7876-9af9-83b5a97dc8dd" xlink:href="viv-20251231.xsd#viv_TelefonicaGlobalTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefonicaGlobalTechnologyMember_019c4274-2dac-7876-9af9-83b5a97dc8dd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaGlobalSolutionsMember_019c44ed-18a6-7afb-9344-e892903e95a9" xlink:href="viv-20251231.xsd#viv_TelefnicaGlobalSolutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefnicaGlobalSolutionsMember_019c44ed-18a6-7afb-9344-e892903e95a9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelxiusCableBrasilMember_019c4274-2dac-7042-a200-f6eed3238a6d" xlink:href="viv-20251231.xsd#viv_TelxiusCableBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelxiusCableBrasilMember_019c4274-2dac-7042-a200-f6eed3238a6d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefnicaCyberTechBrasilMember_019c4274-2dac-7289-a801-7e3d8508786b" xlink:href="viv-20251231.xsd#viv_TelefnicaCyberTechBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefnicaCyberTechBrasilMember_019c4274-2dac-7289-a801-7e3d8508786b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_T.IotBigDataTechEspMember_019c4274-2dac-79ad-a4a5-5af39c0af3b5" xlink:href="viv-20251231.xsd#viv_T.IotBigDataTechEspMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_T.IotBigDataTechEspMember_019c4274-2dac-79ad-a4a5-5af39c0af3b5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c4274-2dac-7d56-a359-a37364d1eb67" xlink:href="viv-20251231.xsd#viv_FibrasilInfraestruturaEFibraOticaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_FibrasilInfraestruturaEFibraOticaMember_019c4274-2dac-7d56-a359-a37364d1eb67" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CompanhiaAixParticipacoesMember_019c44ef-4de2-713f-ac89-b2a2c9d8a141" xlink:href="viv-20251231.xsd#viv_CompanhiaAixParticipacoesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_CompanhiaAixParticipacoesMember_019c44ef-4de2-713f-ac89-b2a2c9d8a141" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TelefonicaFactoringDoBrasilMember_019c44f0-518a-7d4d-ab2b-fa980d47f7f2" xlink:href="viv-20251231.xsd#viv_TelefonicaFactoringDoBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_viv_TelefonicaFactoringDoBrasilMember_019c44f0-518a-7d4d-ab2b-fa980d47f7f2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherRelatedPartiesMember_019c4274-2dac-7c2b-9650-241a0b8abcce" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OtherRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_OtherGroupCompaniesMember_019c4274-2dac-7554-899f-34ac71c5e18e" xlink:to="loc_ifrs-full_OtherRelatedPartiesMember_019c4274-2dac-7c2b-9650-241a0b8abcce" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OperatingRevenuesRelatedPartyTransactions_019c4274-2dac-7dea-926b-582f27060c0b" xlink:href="viv-20251231.xsd#viv_OperatingRevenuesRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-7efe-8623-3638daa472fc" xlink:to="loc_viv_OperatingRevenuesRelatedPartyTransactions_019c4274-2dac-7dea-926b-582f27060c0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherOperatingRevenuesExpensesRelatedPartyTransactions_019c4274-2dac-708d-aa40-035e5e49859e" xlink:href="viv-20251231.xsd#viv_OtherOperatingRevenuesExpensesRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-7efe-8623-3638daa472fc" xlink:to="loc_viv_OtherOperatingRevenuesExpensesRelatedPartyTransactions_019c4274-2dac-708d-aa40-035e5e49859e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetIncomeLossRelatedPartyTransactions_019c4274-2dac-7ff2-a07e-3874345e5be3" xlink:href="viv-20251231.xsd#viv_NetIncomeLossRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_019c4274-2dac-7efe-8623-3638daa472fc" xlink:to="loc_viv_NetIncomeLossRelatedPartyTransactions_019c4274-2dac-7ff2-a07e-3874345e5be3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7663-8d94-3e85ea57b8cb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7663-8d94-3e85ea57b8cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e32-9a56-43e3ee8f22c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7663-8d94-3e85ea57b8cb" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e32-9a56-43e3ee8f22c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7e32-9a56-43e3ee8f22c7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e32-9a56-43e3ee8f22c7" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7e32-9a56-43e3ee8f22c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7b02-bd18-8b9e7e85573e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e32-9a56-43e3ee8f22c7" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7b02-bd18-8b9e7e85573e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EffectOfAssetCeilingMember_019c4274-2dac-7286-b2d5-52fe9e1c1c6c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EffectOfAssetCeilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7b02-bd18-8b9e7e85573e" xlink:to="loc_ifrs-full_EffectOfAssetCeilingMember_019c4274-2dac-7286-b2d5-52fe9e1c1c6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7dd6-afab-8a0780f930a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7663-8d94-3e85ea57b8cb" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7dd6-afab-8a0780f930a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7dd6-afab-8a0780f930a7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7dd6-afab-8a0780f930a7" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7dd6-afab-8a0780f930a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-725a-b6b1-de99f4334351" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7dd6-afab-8a0780f930a7" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-725a-b6b1-de99f4334351" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-70ac-b2a5-05c88f53f87d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-725a-b6b1-de99f4334351" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-70ac-b2a5-05c88f53f87d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-76ef-9484-482e878a8df5" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-725a-b6b1-de99f4334351" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-76ef-9484-482e878a8df5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SurplusDeficitInPlanAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitObligationAtPresentValue_019c4274-2dac-7eb0-ada0-03990a55b5d0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitObligationAtPresentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:to="loc_ifrs-full_DefinedBenefitObligationAtPresentValue_019c4274-2dac-7eb0-ada0-03990a55b5d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsAtFairValue_019c4274-2dac-729e-b4d8-5b88dde38c7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PlanAssetsAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:to="loc_ifrs-full_PlanAssetsAtFairValue_019c4274-2dac-729e-b4d8-5b88dde38c7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SurplusDeficitInPlan_019c4274-2dac-7bf5-8daf-7bb63492a362" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SurplusDeficitInPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:to="loc_ifrs-full_SurplusDeficitInPlan_019c4274-2dac-7bf5-8daf-7bb63492a362" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-72c1-ba33-b311960666f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SurplusDeficitInPlanAbstract_019c4274-2dac-7c31-a927-3ac851a5b9b7" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-72c1-ba33-b311960666f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentRecognisedAssetsDefinedBenefitPlan_019c4274-2dac-78b6-8a15-926ef0b7ebef" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentRecognisedAssetsDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_CurrentRecognisedAssetsDefinedBenefitPlan_019c4274-2dac-78b6-8a15-926ef0b7ebef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan_019c4274-2dac-7165-bc0f-ff0aa4162582" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_NoncurrentRecognisedAssetsDefinedBenefitPlan_019c4274-2dac-7165-bc0f-ff0aa4162582" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-7596-8f60-363211152859" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_CurrentRecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-7596-8f60-363211152859" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-77ea-84d2-f6e403424336" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-71ce-b5e8-3eb4f22e4ef5" xlink:to="loc_ifrs-full_NoncurrentRecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-77ea-84d2-f6e403424336" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7464-8848-1bb1439b38cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7f5b-80f6-ae2f3b8556ce" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7464-8848-1bb1439b38cf" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7f5b-80f6-ae2f3b8556ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-73b8-a1c5-2d4c220a61fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7f5b-80f6-ae2f3b8556ce" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-73b8-a1c5-2d4c220a61fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-73b8-a1c5-2d4c220a61fd_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-73b8-a1c5-2d4c220a61fd" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-73b8-a1c5-2d4c220a61fd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72d7-9cd6-e419321247e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-73b8-a1c5-2d4c220a61fd" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72d7-9cd6-e419321247e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7ba5-8798-c0a95c365dd1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72d7-9cd6-e419321247e4" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7ba5-8798-c0a95c365dd1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7f7b-aad4-a7316771f9ec" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72d7-9cd6-e419321247e4" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7f7b-aad4-a7316771f9ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentServiceCostDefinedBenefitPlans_019c4274-2dac-7118-89c9-b450b91ee60b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentServiceCostDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7464-8848-1bb1439b38cf" xlink:to="loc_ifrs-full_CurrentServiceCostDefinedBenefitPlans_019c4274-2dac-7118-89c9-b450b91ee60b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseIncomeDefinedBenefitPlans_019c4274-2dac-7bfe-903f-425dd905e825" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseIncomeDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7464-8848-1bb1439b38cf" xlink:to="loc_ifrs-full_InterestExpenseIncomeDefinedBenefitPlans_019c4274-2dac-7bfe-903f-425dd905e825" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PostEmploymentBenefitExpensesDefinedBenefitPlans_019c4274-2dac-77e2-9732-1151a2c79330" xlink:href="viv-20251231.xsd#viv_PostEmploymentBenefitExpensesDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7464-8848-1bb1439b38cf" xlink:to="loc_viv_PostEmploymentBenefitExpensesDefinedBenefitPlans_019c4274-2dac-77e2-9732-1151a2c79330" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79b5-8b89-edefabaef3f9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79b5-8b89-edefabaef3f9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a9-ac26-dce349c51bad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79b5-8b89-edefabaef3f9" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a9-ac26-dce349c51bad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70a9-ac26-dce349c51bad_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a9-ac26-dce349c51bad" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70a9-ac26-dce349c51bad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c51-a95e-aa3e65f06749" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a9-ac26-dce349c51bad" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c51-a95e-aa3e65f06749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7631-bc2f-2545a95b5caf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c51-a95e-aa3e65f06749" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7631-bc2f-2545a95b5caf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7a9a-8a0a-cad7c6c72e30" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c51-a95e-aa3e65f06749" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7a9a-8a0a-cad7c6c72e30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsBeforeTaxDefinedBenefitPlans_019c4274-2dac-7323-a01e-30bdef275022" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsBeforeTaxDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsBeforeTaxDefinedBenefitPlans_019c4274-2dac-7323-a01e-30bdef275022" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeilingExcludingInterestIncomeOrExpenseBeforeTaxDefinedBenefitPlans_019c4274-2dac-7c18-9bd3-a94f837c554e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainsLossesOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeilingExcludingInterestIncomeOrExpenseBeforeTaxDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_ifrs-full_GainsLossesOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeilingExcludingInterestIncomeOrExpenseBeforeTaxDefinedBenefitPlans_019c4274-2dac-7c18-9bd3-a94f837c554e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PostEmploymentBenefitsRecognizedInOtherComprehensiveIncomeLoss_019c4274-2dac-757a-b56d-56f612e6055a" xlink:href="viv-20251231.xsd#viv_PostEmploymentBenefitsRecognizedInOtherComprehensiveIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_viv_PostEmploymentBenefitsRecognizedInOtherComprehensiveIncomeLoss_019c4274-2dac-757a-b56d-56f612e6055a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome_019c4274-2dac-7a4c-b9df-078bd7c2b927" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome_019c4274-2dac-7a4c-b9df-078bd7c2b927" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome_019c4274-2dac-752c-ba1a-272de09b2632" xlink:href="viv-20251231.xsd#viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome_019c4274-2dac-752c-ba1a-272de09b2632" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentIncomeTaxAndSocialContribution_019c4274-2dac-7508-8f5c-ca7502ce5cd2" xlink:href="viv-20251231.xsd#viv_CurrentIncomeTaxAndSocialContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7bdc-88fe-cae91dc44944" xlink:to="loc_viv_CurrentIncomeTaxAndSocialContribution_019c4274-2dac-7508-8f5c-ca7502ce5cd2" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails4" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7911-9738-b95a270e7d7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7911-9738-b95a270e7d7c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-729d-96cb-ffbd3eb4627c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7911-9738-b95a270e7d7c" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-729d-96cb-ffbd3eb4627c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-729d-96cb-ffbd3eb4627c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-729d-96cb-ffbd3eb4627c" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-729d-96cb-ffbd3eb4627c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7546-a6ad-bb822e4e42ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-729d-96cb-ffbd3eb4627c" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7546-a6ad-bb822e4e42ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-746f-8ade-3c1cd69e56e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7546-a6ad-bb822e4e42ab" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-746f-8ade-3c1cd69e56e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7dbf-8835-2c51143be36f" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7546-a6ad-bb822e4e42ab" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7dbf-8835-2c51143be36f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7fab-9cdb-978fd2cc31ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7fab-9cdb-978fd2cc31ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentServiceCostAndInterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-729a-9ef3-8888201d26a2" xlink:href="viv-20251231.xsd#viv_CurrentServiceCostAndInterestExpenseIncomeNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_viv_CurrentServiceCostAndInterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-729a-9ef3-8888201d26a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentsFromPlanAndContributionsToPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-72a1-9396-dbefde84c5eb" xlink:href="viv-20251231.xsd#viv_PaymentsFromPlanAndContributionsToPlanNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_viv_PaymentsFromPlanAndContributionsToPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-72a1-9396-dbefde84c5eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset_019c4274-2dac-78c6-8a0f-3a235d9c4e05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_ifrs-full_GainLossOnRemeasurementOfNetDefinedBenefitLiabilityAsset_019c4274-2dac-78c6-8a0f-3a235d9c4e05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset_019c4274-2dac-7b1c-b037-f9529b65c9e7" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset_019c4274-2dac-7b1c-b037-f9529b65c9e7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7722-8db5-c93748117ec7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecognisedAssetsDefinedBenefitPlan_019c4274-2dac-709c-b9ea-af6cb1250aa7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RecognisedAssetsDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_ifrs-full_RecognisedAssetsDefinedBenefitPlan_019c4274-2dac-709c-b9ea-af6cb1250aa7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ActuarialAssetsPerBalanceSheet_019c4274-2dac-79ac-977f-cd3eb94091d2" xlink:href="viv-20251231.xsd#viv_ActuarialAssetsPerBalanceSheet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_viv_ActuarialAssetsPerBalanceSheet_019c4274-2dac-79ac-977f-cd3eb94091d2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ActuarialLiabilitiesPerBalanceSheet_019c4274-2dac-70c0-8b1f-c3eba3e4583c" xlink:href="viv-20251231.xsd#viv_ActuarialLiabilitiesPerBalanceSheet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_viv_ActuarialLiabilitiesPerBalanceSheet_019c4274-2dac-70c0-8b1f-c3eba3e4583c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-799c-bd18-5f982c420ff0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ae4-8b2f-227ecdccd68c" xlink:to="loc_ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-799c-bd18-5f982c420ff0" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails5" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails5"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails5" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-752b-8e86-781bbc395652" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-752b-8e86-781bbc395652" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7154-bdd2-e30b18071138" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-752b-8e86-781bbc395652" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7154-bdd2-e30b18071138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7154-bdd2-e30b18071138_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7154-bdd2-e30b18071138" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7154-bdd2-e30b18071138_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7a74-a7b2-695e7be49597" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7154-bdd2-e30b18071138" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7a74-a7b2-695e7be49597" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-70af-b068-467e7f06b611" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7a74-a7b2-695e7be49597" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-70af-b068-467e7f06b611" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7338-bd38-9f8574863aa8" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7a74-a7b2-695e7be49597" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7338-bd38-9f8574863aa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-713f-be6e-26725f77e1a9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-752b-8e86-781bbc395652" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-713f-be6e-26725f77e1a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-713f-be6e-26725f77e1a9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-713f-be6e-26725f77e1a9" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-713f-be6e-26725f77e1a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-72ba-8e13-eff6066cb1f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-713f-be6e-26725f77e1a9" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-72ba-8e13-eff6066cb1f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember_019c4274-2dac-7ddc-9299-52d894cd6705" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PresentValueOfDefinedBenefitObligationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-72ba-8e13-eff6066cb1f1" xlink:to="loc_ifrs-full_PresentValueOfDefinedBenefitObligationMember_019c4274-2dac-7ddc-9299-52d894cd6705" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-721a-ab1e-e488afea4ea3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-721a-ab1e-e488afea4ea3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-78b0-b5f6-840ed1a63a26" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-78b0-b5f6-840ed1a63a26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan_019c4274-2dac-77d7-90c5-6a91d081567f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RecognisedLiabilitiesDefinedBenefitPlan"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_019c4274-2dac-7082-8c2f-7c557c76ab7f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_CurrentServiceCostNetDefinedBenefitLiabilityAsset_019c4274-2dac-7082-8c2f-7c557c76ab7f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7302-a97a-5cafc5f8d6c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7302-a97a-5cafc5f8d6c2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-7cc0-b37f-fcd03dd7db79" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-7cc0-b37f-fcd03dd7db79" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset_019c4274-2dac-723a-9cda-5f2e61afcb81" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset_019c4274-2dac-723a-9cda-5f2e61afcb81" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7f69-90cf-def1f61371d3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_ActuarialGainsLossesArisingFromExperienceAdjustmentsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7f69-90cf-def1f61371d3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7258-90d7-38ad82d01a5e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7258-90d7-38ad82d01a5e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7d5b-a581-690136ad0db5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-712b-9feb-90f0e391f8d5" xlink:to="loc_ifrs-full_ActuarialGainsLossesArisingFromChangesInDemographicAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7d5b-a581-690136ad0db5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-74b8-ae85-9f7ef2e40db0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails6" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails6"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails6" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7247-aa70-3269954fd5b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7247-aa70-3269954fd5b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-77b7-842d-3753171d0fe6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7247-aa70-3269954fd5b9" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-77b7-842d-3753171d0fe6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-77b7-842d-3753171d0fe6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-77b7-842d-3753171d0fe6" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-77b7-842d-3753171d0fe6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7304-8f35-762f9119910c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-77b7-842d-3753171d0fe6" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7304-8f35-762f9119910c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7e81-bf6a-22b986a07b7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7304-8f35-762f9119910c" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7e81-bf6a-22b986a07b7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-76a8-9bc7-fc796184141f" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7304-8f35-762f9119910c" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-76a8-9bc7-fc796184141f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7c75-a00b-61ef174b1403" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7247-aa70-3269954fd5b9" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7c75-a00b-61ef174b1403" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7c75-a00b-61ef174b1403_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7c75-a00b-61ef174b1403" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7c75-a00b-61ef174b1403_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-78f9-b254-b839fac0ba7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7c75-a00b-61ef174b1403" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-78f9-b254-b839fac0ba7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsMember_019c4274-2dac-76c0-b8df-0c6ff2fa7643" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PlanAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-78f9-b254-b839fac0ba7e" xlink:to="loc_ifrs-full_PlanAssetsMember_019c4274-2dac-76c0-b8df-0c6ff2fa7643" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7896-a520-6f271b301676" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7896-a520-6f271b301676" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-7caf-8858-0da849c11b27" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_PaymentsFromPlanNetDefinedBenefitLiabilityAsset_019c4274-2dac-7caf-8858-0da849c11b27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset_019c4274-2dac-75b3-989f-ce1be1e74d00" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_ContributionsToPlanByPlanParticipantsNetDefinedBenefitLiabilityAsset_019c4274-2dac-75b3-989f-ce1be1e74d00" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset_019c4274-2dac-7ab1-8a42-26f08459f103" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_ContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset_019c4274-2dac-7ab1-8a42-26f08459f103" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7884-82bc-eba36a3fa02a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7884-82bc-eba36a3fa02a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7c03-8976-64a5e97dc2db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_ifrs-full_ReturnOnPlanAssetsNetDefinedBenefitLiabilityAsset_019c4274-2dac-7c03-8976-64a5e97dc2db" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset_019c4274-2dac-7367-939b-c00991295459" xlink:href="viv-20251231.xsd#viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ce7-aa23-950e9984e8a6" xlink:to="loc_viv_IncreaseDecreaseThroughTransferOfReservesBetweenPlansNetDefinedBenefitLiabilityAsset_019c4274-2dac-7367-939b-c00991295459" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7f2a-8f31-a7e8234e2da8" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails7" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails7"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails7" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7d83-87cf-d1e3f1cbb73d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-772d-be66-85f5e47c5f8f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7d83-87cf-d1e3f1cbb73d" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-772d-be66-85f5e47c5f8f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-72b0-8d98-1dbc8162cc7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-772d-be66-85f5e47c5f8f" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-72b0-8d98-1dbc8162cc7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72b0-8d98-1dbc8162cc7d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-72b0-8d98-1dbc8162cc7d" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-72b0-8d98-1dbc8162cc7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7312-ab1d-90457bf6101f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-72b0-8d98-1dbc8162cc7d" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7312-ab1d-90457bf6101f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7168-b80f-bea36fb77853" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7312-ab1d-90457bf6101f" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7168-b80f-bea36fb77853" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7794-a4fa-ed91e58466e7" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7312-ab1d-90457bf6101f" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7794-a4fa-ed91e58466e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e96-b24c-cf9c112eac7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-772d-be66-85f5e47c5f8f" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e96-b24c-cf9c112eac7d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7e96-b24c-cf9c112eac7d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e96-b24c-cf9c112eac7d" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7e96-b24c-cf9c112eac7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7de2-8b47-6e01d7e74ed3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-7e96-b24c-cf9c112eac7d" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7de2-8b47-6e01d7e74ed3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EffectOfAssetCeilingMember_019c4274-2dac-7877-b45f-c30a8c24aeab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EffectOfAssetCeilingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-7de2-8b47-6e01d7e74ed3" xlink:to="loc_ifrs-full_EffectOfAssetCeilingMember_019c4274-2dac-7877-b45f-c30a8c24aeab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7487-b7a5-9296aa0bf600" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7d83-87cf-d1e3f1cbb73d" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7487-b7a5-9296aa0bf600" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7a9d-b0ef-cd5e4d7cebb0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7d83-87cf-d1e3f1cbb73d" xlink:to="loc_ifrs-full_InterestExpenseIncomeNetDefinedBenefitLiabilityAsset_019c4274-2dac-7a9d-b0ef-cd5e4d7cebb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling_019c4274-2dac-7120-bc3f-4a38564e1337" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7d83-87cf-d1e3f1cbb73d" xlink:to="loc_ifrs-full_GainLossOnChangesInEffectOfLimitingNetDefinedBenefitAssetToAssetCeiling_019c4274-2dac-7120-bc3f-4a38564e1337" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7495-bb07-20b8ad88f25d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails8" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails8"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails8" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ed4-966d-10db105e61b2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7cf5-8bd4-6c146e4048bc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ed4-966d-10db105e61b2" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7cf5-8bd4-6c146e4048bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7b88-8f73-eb160c5ba98c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7cf5-8bd4-6c146e4048bc" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7b88-8f73-eb160c5ba98c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7b88-8f73-eb160c5ba98c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7b88-8f73-eb160c5ba98c" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7b88-8f73-eb160c5ba98c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7cd7-8ea4-7a094a77be9e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7b88-8f73-eb160c5ba98c" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7cd7-8ea4-7a094a77be9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7dc5-b5c7-606d39fecd63" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7cd7-8ea4-7a094a77be9e" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7dc5-b5c7-606d39fecd63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-784f-a9f3-b905e44dca73" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7cd7-8ea4-7a094a77be9e" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-784f-a9f3-b905e44dca73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPlansEstimatedServiceCost_019c4274-2dac-7773-94dd-d26c34bc045c" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPlansEstimatedServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ed4-966d-10db105e61b2" xlink:to="loc_viv_DefinedBenefitPlansEstimatedServiceCost_019c4274-2dac-7773-94dd-d26c34bc045c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedNetInterestOnNetActuarialAssetsLiabilities_019c4274-2dac-7ad4-b8ab-a71bbdc49e21" xlink:href="viv-20251231.xsd#viv_EstimatedNetInterestOnNetActuarialAssetsLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ed4-966d-10db105e61b2" xlink:to="loc_viv_EstimatedNetInterestOnNetActuarialAssetsLiabilities_019c4274-2dac-7ad4-b8ab-a71bbdc49e21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedPostEmploymentBenefitExpenseDefinedBenefitPlans_019c4274-2dac-7892-8f75-55a82c30488b" xlink:href="viv-20251231.xsd#viv_EstimatedPostEmploymentBenefitExpenseDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7ed4-966d-10db105e61b2" xlink:to="loc_viv_EstimatedPostEmploymentBenefitExpenseDefinedBenefitPlans_019c4274-2dac-7892-8f75-55a82c30488b" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails9" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails9"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails9" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7819-8d1e-89fad7369347" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79a6-bc1f-34f95fa5fa11" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7819-8d1e-89fad7369347" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79a6-bc1f-34f95fa5fa11" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-79a6-bc1f-34f95fa5fa11" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7220-964c-05c93bf9a67a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7fc7-8b6e-2f0fe0a6b165" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7220-964c-05c93bf9a67a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-714e-82fd-8ad69c503e58" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7220-964c-05c93bf9a67a" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-714e-82fd-8ad69c503e58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7051-8f14-c781b22efab7" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7220-964c-05c93bf9a67a" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7051-8f14-c781b22efab7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset_019c4274-2dac-7f56-a486-f086deb2195f" xlink:href="viv-20251231.xsd#viv_EstimatedContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7819-8d1e-89fad7369347" xlink:to="loc_viv_EstimatedContributionsToPlanByEmployerNetDefinedBenefitLiabilityAsset_019c4274-2dac-7f56-a486-f086deb2195f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimatedBenefitsPaidBySponsor_019c4274-2dac-7143-9ae5-2654516b9dd9" xlink:href="viv-20251231.xsd#viv_EstimatedBenefitsPaidBySponsor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7819-8d1e-89fad7369347" xlink:to="loc_viv_EstimatedBenefitsPaidBySponsor_019c4274-2dac-7143-9ae5-2654516b9dd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EstimateOfContributionsExpectedToBePaid_019c4274-2dac-7c49-b550-e244a0fb7670" xlink:href="viv-20251231.xsd#viv_EstimateOfContributionsExpectedToBePaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7819-8d1e-89fad7369347" xlink:to="loc_viv_EstimateOfContributionsExpectedToBePaid_019c4274-2dac-7c49-b550-e244a0fb7670" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails10" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails10"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails10" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7df9-b4e0-117d1e8a9a05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7bc0-ace6-0e4539f429d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7df9-b4e0-117d1e8a9a05" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7bc0-ace6-0e4539f429d5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7d6d-8cf3-13daed663525" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7bc0-ace6-0e4539f429d5" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7d6d-8cf3-13daed663525" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7d6d-8cf3-13daed663525_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7d6d-8cf3-13daed663525" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7d6d-8cf3-13daed663525_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c50-9120-13bf3962dace" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-7d6d-8cf3-13daed663525" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c50-9120-13bf3962dace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7de9-bf0a-7d1c66d5e870" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c50-9120-13bf3962dace" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7de9-bf0a-7d1c66d5e870" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7049-9336-190c19299f6a" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7c50-9120-13bf3962dace" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7049-9336-190c19299f6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019_019c4274-2dac-7777-88d3-35b0a29438ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7df9-b4e0-117d1e8a9a05" xlink:to="loc_ifrs-full_WeightedAverageDurationOfDefinedBenefitObligation2019_019c4274-2dac-7777-88d3-35b0a29438ec" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails11" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails11"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails11" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7e4c-a2d8-f30db8924183" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7e4c-a2d8-f30db8924183" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-79f2-b827-4ef56882fc28" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7e4c-a2d8-f30db8924183" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-79f2-b827-4ef56882fc28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-79f2-b827-4ef56882fc28_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-79f2-b827-4ef56882fc28" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-79f2-b827-4ef56882fc28_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70d9-9149-8b5a40e23833" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-79f2-b827-4ef56882fc28" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70d9-9149-8b5a40e23833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70d9-9149-8b5a40e23833" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RetirementPlanVisaoTelefonicaPlanMember_019c4274-2dac-7fc9-907d-e519fab26fbd" xlink:href="viv-20251231.xsd#viv_RetirementPlanVisaoTelefonicaPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:to="loc_viv_RetirementPlanVisaoTelefonicaPlanMember_019c4274-2dac-7fc9-907d-e519fab26fbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RetirementPlansVivoprevmVisaoMember_019c4274-2dac-7268-b2b6-b8b67a9ac003" xlink:href="viv-20251231.xsd#viv_RetirementPlansVivoprevmVisaoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:to="loc_viv_RetirementPlansVivoprevmVisaoMember_019c4274-2dac-7268-b2b6-b8b67a9ac003" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RetirementPlansPbsAssistedPlanCompanhiaTelefonicaBrasileiraAndTelefonicaDefinedBenefitPlanMember_019c4274-2dac-74c5-b36e-89afc620177c" xlink:href="viv-20251231.xsd#viv_RetirementPlansPbsAssistedPlanCompanhiaTelefonicaBrasileiraAndTelefonicaDefinedBenefitPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:to="loc_viv_RetirementPlansPbsAssistedPlanCompanhiaTelefonicaBrasileiraAndTelefonicaDefinedBenefitPlanMember_019c4274-2dac-74c5-b36e-89afc620177c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LightForteAlvaroVindasMember_019c4274-2dac-7406-942f-9bac814c1bf5" xlink:href="viv-20251231.xsd#viv_LightForteAlvaroVindasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:to="loc_viv_LightForteAlvaroVindasMember_019c4274-2dac-7406-942f-9bac814c1bf5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LightFracaMember_019c4274-2dac-78f1-888b-f6e948a9ebac" xlink:href="viv-20251231.xsd#viv_LightFracaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-79ba-8a2e-7c69969eb843" xlink:to="loc_viv_LightFracaMember_019c4274-2dac-78f1-888b-f6e948a9ebac" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7546-8e51-e1e2c6d2e750" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70d9-9149-8b5a40e23833" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7546-8e51-e1e2c6d2e750" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansForFemaleParticipantsMember_019c4274-2dac-72ef-a195-c2c660bdd1d7" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansForFemaleParticipantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7546-8e51-e1e2c6d2e750" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansForFemaleParticipantsMember_019c4274-2dac-72ef-a195-c2c660bdd1d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansForMaleParticipantsMember_019c4274-2dac-74a1-ae22-b7cd661bd52a" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansForMaleParticipantsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7546-8e51-e1e2c6d2e750" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansForMaleParticipantsMember_019c4274-2dac-74a1-ae22-b7cd661bd52a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_019c4274-2dac-72d3-9ad9-559452b949ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetTable_019c4274-2dac-7e4c-a2d8-f30db8924183" xlink:to="loc_ifrs-full_RangeAxis_019c4274-2dac-72d3-9ad9-559452b949ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2dac-72d3-9ad9-559452b949ff_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2dac-72d3-9ad9-559452b949ff" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2dac-72d3-9ad9-559452b949ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeDomain_019c4274-2dac-7e5a-8ff4-7b2da01a6c27" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_RangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_019c4274-2dac-72d3-9ad9-559452b949ff" xlink:to="loc_ifrs-full_RangeDomain_019c4274-2dac-7e5a-8ff4-7b2da01a6c27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_019c4274-2dac-7ec7-9514-9cb31d173d69" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2dac-7e5a-8ff4-7b2da01a6c27" xlink:to="loc_ifrs-full_BottomOfRangeMember_019c4274-2dac-7ec7-9514-9cb31d173d69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_019c4274-2dac-750d-bd01-204200528d66" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangeDomain_019c4274-2dac-7e5a-8ff4-7b2da01a6c27" xlink:to="loc_ifrs-full_TopOfRangeMember_019c4274-2dac-750d-bd01-204200528d66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfDiscountRates_019c4274-2dac-74ce-a0af-4efeeeb1e3b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfDiscountRates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfDiscountRates_019c4274-2dac-74ce-a0af-4efeeeb1e3b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases_019c4274-2dac-714c-9018-6c3a6322bb53" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases_019c4274-2dac-714c-9018-6c3a6322bb53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates_019c4274-2dac-7a29-be4b-62cadca61b7b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfMedicalCostTrendRates_019c4274-2dac-7a29-be4b-62cadca61b7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases_019c4274-2dac-7970-b9fd-005ddeabdb40" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases_019c4274-2dac-7970-b9fd-005ddeabdb40" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MedicalServiceEligibilityAge_019c4274-2dac-71d2-83ca-d59a12c660af" xlink:href="viv-20251231.xsd#viv_MedicalServiceEligibilityAge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_MedicalServiceEligibilityAge_019c4274-2dac-71d2-83ca-d59a12c660af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfRetirementAge2019_019c4274-2dac-7e93-ac7b-79809541770a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfRetirementAge2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfRetirementAge2019_019c4274-2dac-7e93-ac7b-79809541770a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseInPercentageOfMortalityTableForNondisabledIndividuals_019c4274-2dac-7bfc-b644-1cf2143ebfd9" xlink:href="viv-20251231.xsd#viv_DecreaseInPercentageOfMortalityTableForNondisabledIndividuals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_DecreaseInPercentageOfMortalityTableForNondisabledIndividuals_019c4274-2dac-7bfc-b644-1cf2143ebfd9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseInPercentageOfMortalityTableForDisabledIndividuals_019c4274-2dac-7c18-92da-82177597c419" xlink:href="viv-20251231.xsd#viv_DecreaseInPercentageOfMortalityTableForDisabledIndividuals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_DecreaseInPercentageOfMortalityTableForDisabledIndividuals_019c4274-2dac-7c18-92da-82177597c419" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisabilityTableDownwardPercentage_019c4274-2dac-76b0-b183-08e25e58fad2" xlink:href="viv-20251231.xsd#viv_DisabilityTableDownwardPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_DisabilityTableDownwardPercentage_019c4274-2dac-76b0-b183-08e25e58fad2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans_019c4274-2dac-70fa-9613-0b7280e3f462" xlink:href="viv-20251231.xsd#viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans_019c4274-2dac-70fa-9613-0b7280e3f462" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge_019c4274-2dac-76ac-8c40-0afaa6f24453" xlink:href="viv-20251231.xsd#viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge_019c4274-2dac-76ac-8c40-0afaa6f24453" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation_019c4274-2dac-7680-9204-be22c10a5866" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_ifrs-full_ActuarialAssumptionOfExpectedRatesOfInflation_019c4274-2dac-7680-9204-be22c10a5866" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AnnualIncreaseInUseOfHealthcareServicesAccordingToAge_019c4274-2dac-7d6e-8c63-26b10b131818" xlink:href="viv-20251231.xsd#viv_AnnualIncreaseInUseOfHealthcareServicesAccordingToAge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetLineItems_019c4274-2dac-7c23-b3d1-5fc4da2be36c" xlink:to="loc_viv_AnnualIncreaseInUseOfHealthcareServicesAccordingToAge_019c4274-2dac-7d6e-8c63-26b10b131818" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails12" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails12"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails12" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c4274-2dac-7fba-90ae-a8f27616170f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c4274-2dac-78ca-966e-fe06580be34e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c4274-2dac-7fba-90ae-a8f27616170f" xlink:to="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c4274-2dac-78ca-966e-fe06580be34e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-75dc-ac4e-08c78610dc12" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c4274-2dac-78ca-966e-fe06580be34e" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-75dc-ac4e-08c78610dc12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-75dc-ac4e-08c78610dc12_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-75dc-ac4e-08c78610dc12" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-75dc-ac4e-08c78610dc12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-785b-b6f0-de5f58c31820" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDefinedBenefitLiabilityAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetAxis_019c4274-2dac-75dc-ac4e-08c78610dc12" xlink:to="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-785b-b6f0-de5f58c31820" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PresentValueOfDefinedBenefitObligationCurrentActuarialAssumptionsMember_019c4274-2dac-7a7b-8299-8bd332d93dd7" xlink:href="viv-20251231.xsd#viv_PresentValueOfDefinedBenefitObligationCurrentActuarialAssumptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-785b-b6f0-de5f58c31820" xlink:to="loc_viv_PresentValueOfDefinedBenefitObligationCurrentActuarialAssumptionsMember_019c4274-2dac-7a7b-8299-8bd332d93dd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PresentValueOfDefinedBenefitObligationPriorYearActuarialAssumptionsMember_019c4274-2dac-7a89-8d60-ead884570ba7" xlink:href="viv-20251231.xsd#viv_PresentValueOfDefinedBenefitObligationPriorYearActuarialAssumptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NetDefinedBenefitLiabilityAssetDomain_019c4274-2dac-785b-b6f0-de5f58c31820" xlink:to="loc_viv_PresentValueOfDefinedBenefitObligationPriorYearActuarialAssumptionsMember_019c4274-2dac-7a89-8d60-ead884570ba7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a3-ad04-3db19ee6021b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c4274-2dac-78ca-966e-fe06580be34e" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a3-ad04-3db19ee6021b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70a3-ad04-3db19ee6021b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a3-ad04-3db19ee6021b" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-70a3-ad04-3db19ee6021b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-76ab-9b81-8af76b1f2a2b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-70a3-ad04-3db19ee6021b" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-76ab-9b81-8af76b1f2a2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7f7b-a8ea-a7ce1ce90232" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-76ab-9b81-8af76b1f2a2b" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7f7b-a8ea-a7ce1ce90232" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7777-a1b9-75e77a82bd1b" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-76ab-9b81-8af76b1f2a2b" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7777-a1b9-75e77a82bd1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7f2d-ba75-ad5b014a6e4a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c4274-2dac-7fba-90ae-a8f27616170f" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_019c4274-2dac-7f2d-ba75-ad5b014a6e4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ActuarialGainsLossesArisingFromChangesInDemographicAndFinancialAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-725e-b7ce-c4cd01d1a4d1" xlink:href="viv-20251231.xsd#viv_ActuarialGainsLossesArisingFromChangesInDemographicAndFinancialAssumptionsNetDefinedBenefitLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c4274-2dac-7fba-90ae-a8f27616170f" xlink:to="loc_viv_ActuarialGainsLossesArisingFromChangesInDemographicAndFinancialAssumptionsNetDefinedBenefitLiabilityAsset_019c4274-2dac-725e-b7ce-c4cd01d1a4d1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails13" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails13"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails13" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c7764-cdc0-7205-9d93-a4aea85e03b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c7764-cdbf-7345-be04-bdd84b894334" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDefinedBenefitPlansTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c7764-cdc0-7205-9d93-a4aea85e03b1" xlink:to="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c7764-cdbf-7345-be04-bdd84b894334" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c7764-cdbf-7c3e-adff-11bfec2b0626" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c7764-cdbf-7345-be04-bdd84b894334" xlink:to="loc_srt_StatementScenarioAxis_019c7764-cdbf-7c3e-adff-11bfec2b0626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7c3e-adff-11bfec2b0626_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c7764-cdbf-7c3e-adff-11bfec2b0626" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7c3e-adff-11bfec2b0626_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7555-baca-57ba73b1384c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c7764-cdbf-7c3e-adff-11bfec2b0626" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7555-baca-57ba73b1384c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BasedOnRateIncreasedMember_019c7764-cdc0-791a-a70c-3780454af045" xlink:href="viv-20251231.xsd#viv_BasedOnRateIncreasedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7555-baca-57ba73b1384c" xlink:to="loc_viv_BasedOnRateIncreasedMember_019c7764-cdc0-791a-a70c-3780454af045" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BasedOnRateDecreasedMember_019c7764-cdc0-7884-aaa6-67b2bac2484f" xlink:href="viv-20251231.xsd#viv_BasedOnRateDecreasedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c7764-cdbf-7555-baca-57ba73b1384c" xlink:to="loc_viv_BasedOnRateDecreasedMember_019c7764-cdc0-7884-aaa6-67b2bac2484f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c7764-cdc0-7db9-ba4b-d71e53f2237a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansTable_019c7764-cdbf-7345-be04-bdd84b894334" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c7764-cdc0-7db9-ba4b-d71e53f2237a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-7db9-ba4b-d71e53f2237a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c7764-cdc0-7db9-ba4b-d71e53f2237a" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-7db9-ba4b-d71e53f2237a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-769b-84f0-c389f3d411c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c7764-cdc0-7db9-ba4b-d71e53f2237a" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-769b-84f0-c389f3d411c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c7764-cdc0-79f0-8119-70f36238b3d5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-769b-84f0-c389f3d411c6" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c7764-cdc0-79f0-8119-70f36238b3d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c7764-cdc0-70ac-9355-bae6b83ab42d" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c7764-cdc0-769b-84f0-c389f3d411c6" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c7764-cdc0-70ac-9355-bae6b83ab42d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitLiabilityDiscountedToPresentValue_019c7764-cdc0-7e35-a30e-902267369165" xlink:href="viv-20251231.xsd#viv_DefinedBenefitLiabilityDiscountedToPresentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c7764-cdc0-7205-9d93-a4aea85e03b1" xlink:to="loc_viv_DefinedBenefitLiabilityDiscountedToPresentValue_019c7764-cdc0-7e35-a30e-902267369165" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitLiabilityProjectedByTheCurrentMedicalCostGrowthRate_019c7764-cdc0-7b41-8f95-9767575dcfad" xlink:href="viv-20251231.xsd#viv_DefinedBenefitLiabilityProjectedByTheCurrentMedicalCostGrowthRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDefinedBenefitPlansLineItems_019c7764-cdc0-7205-9d93-a4aea85e03b1" xlink:to="loc_viv_DefinedBenefitLiabilityProjectedByTheCurrentMedicalCostGrowthRate_019c7764-cdc0-7b41-8f95-9767575dcfad" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails14" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails14"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONSPLANSANDOTHERPOSTEMPLOYMENTBENEFITSDetails14" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c4274-2dac-72f0-b13c-ae349c3ea6bb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c4274-2dac-72f0-b13c-ae349c3ea6bb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-781e-b7ee-d865733916f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c4274-2dac-72f0-b13c-ae349c3ea6bb" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-781e-b7ee-d865733916f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-781e-b7ee-d865733916f2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-781e-b7ee-d865733916f2" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-781e-b7ee-d865733916f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7ff0-8c2e-f90a47dedb74" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c4274-2dac-781e-b7ee-d865733916f2" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7ff0-8c2e-f90a47dedb74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AllocationOfPlanAssetsMember_019c4274-2dac-7cc4-98f2-273ff25b59ad" xlink:href="viv-20251231.xsd#viv_AllocationOfPlanAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c4274-2dac-7ff0-8c2e-f90a47dedb74" xlink:to="loc_viv_AllocationOfPlanAssetsMember_019c4274-2dac-7cc4-98f2-273ff25b59ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7967-a94f-430598263b02" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfPlanAssetsMember_019c4274-2dac-7cc4-98f2-273ff25b59ad" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c4274-2dac-7967-a94f-430598263b02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7e95-b685-d6c8b11cd7e3" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPostRetirementHealthPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_AllocationOfPlanAssetsMember_019c4274-2dac-7cc4-98f2-273ff25b59ad" xlink:to="loc_viv_DefinedBenefitPostRetirementHealthPlansMember_019c4274-2dac-7e95-b685-d6c8b11cd7e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dac-705c-9645-84543367d595" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c4274-2dac-72f0-b13c-ae349c3ea6bb" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dac-705c-9645-84543367d595" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-705c-9645-84543367d595_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dac-705c-9645-84543367d595" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-705c-9645-84543367d595_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dac-705c-9645-84543367d595" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NationalTreasuryNoteNtnFixedIncomeInvestmentsMember_019c4274-2dac-71c5-b9d6-5016e9a62cc8" xlink:href="viv-20251231.xsd#viv_NationalTreasuryNoteNtnFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_NationalTreasuryNoteNtnFixedIncomeInvestmentsMember_019c4274-2dac-71c5-b9d6-5016e9a62cc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TreasuryFinancialLetterLftFixedIncomeInvestmentsMember_019c4274-2dac-713a-a71e-08b88d46245e" xlink:href="viv-20251231.xsd#viv_TreasuryFinancialLetterLftFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_TreasuryFinancialLetterLftFixedIncomeInvestmentsMember_019c4274-2dac-713a-a71e-08b88d46245e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RepurchaseOperationsFixedIncomeInvestmentsMember_019c4274-2dac-78e6-9f0e-3bbaffcb4306" xlink:href="viv-20251231.xsd#viv_RepurchaseOperationsFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_RepurchaseOperationsFixedIncomeInvestmentsMember_019c4274-2dac-78e6-9f0e-3bbaffcb4306" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebenturesFixedIncomeInvestmentsMember_019c4274-2dac-7306-88ea-67133faed817" xlink:href="viv-20251231.xsd#viv_DebenturesFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_DebenturesFixedIncomeInvestmentsMember_019c4274-2dac-7306-88ea-67133faed817" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialBillsFixedIncomeInvestmentsMember_019c4274-2dac-7ae4-ba54-fccc52d2210d" xlink:href="viv-20251231.xsd#viv_FinancialBillsFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_FinancialBillsFixedIncomeInvestmentsMember_019c4274-2dac-7ae4-ba54-fccc52d2210d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FidcSharesOthersFixedIncomeInvestmentsMember_019c4274-2dac-79dd-a88f-cf7c9201a0eb" xlink:href="viv-20251231.xsd#viv_FidcSharesOthersFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_FidcSharesOthersFixedIncomeInvestmentsMember_019c4274-2dac-79dd-a88f-cf7c9201a0eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NationalTreasuryNotesLtnFixedIncomeInvestmentsMember_019c4274-2dac-7926-9ac8-45c495e7ba05" xlink:href="viv-20251231.xsd#viv_NationalTreasuryNotesLtnFixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_NationalTreasuryNotesLtnFixedIncomeInvestmentsMember_019c4274-2dac-7926-9ac8-45c495e7ba05" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InvestmentsLinkedToFundsAndMarketIndexesMember_019c4274-2dac-765c-9be1-2753ab4d3c19" xlink:href="viv-20251231.xsd#viv_InvestmentsLinkedToFundsAndMarketIndexesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dac-7fcd-b9e0-a0a1c6747e83" xlink:to="loc_viv_InvestmentsLinkedToFundsAndMarketIndexesMember_019c4274-2dac-765c-9be1-2753ab4d3c19" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DebtInstrumentsAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7cc1-bd24-c335202f2f49" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DebtInstrumentsAmountContributedToFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_DebtInstrumentsAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7cc1-bd24-c335202f2f49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets_019c4274-2dac-70dd-80f9-315d71c76cf6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets_019c4274-2dac-70dd-80f9-315d71c76cf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7c26-ba60-ddda5da11479" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyAmountContributedToFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_PropertyAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7c26-ba60-ddda5da11479" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansToParticipants_019c4274-2dac-7e13-be8a-fcbe02d647b1" xlink:href="viv-20251231.xsd#viv_LoansToParticipants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_viv_LoansToParticipants_019c4274-2dac-7e13-be8a-fcbe02d647b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StructuredDebtAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7918-af22-56227508da9c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_StructuredDebtAmountContributedToFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_StructuredDebtAmountContributedToFairValueOfPlanAssets_019c4274-2dac-7918-af22-56227508da9c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PlanAssetsAtFairValue_019c4274-2dac-7db7-8844-82c300acc2db" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PlanAssetsAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c4274-2dac-7f83-9bd6-57d372a31d5b" xlink:to="loc_ifrs-full_PlanAssetsAtFairValue_019c4274-2dac-7db7-8844-82c300acc2db" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/PENSIONPLANSANDOTHERPOSTEMPLOYMENTBENEFITSAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#PENSIONPLANSANDOTHERPOSTEMPLOYMENTBENEFITSAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/PENSIONPLANSANDOTHERPOSTEMPLOYMENTBENEFITSAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c7746-5a86-75ed-aef2-3dcfa9225a7e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFairValueOfPlanAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c7746-5a86-75ed-aef2-3dcfa9225a7e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_019c7752-4c23-7fb5-aad7-5ded4b2704cb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsTable_019c7746-5a86-75ed-aef2-3dcfa9225a7e" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_019c7752-4c23-7fb5-aad7-5ded4b2704cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-7fb5-aad7-5ded4b2704cb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c7752-4c23-7fb5-aad7-5ded4b2704cb" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-7fb5-aad7-5ded4b2704cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-776b-8d02-3fe14ad6e533" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_019c7752-4c23-7fb5-aad7-5ded4b2704cb" xlink:to="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-776b-8d02-3fe14ad6e533" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c7752-4c23-74c4-8127-4b5dd46d7c05" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-776b-8d02-3fe14ad6e533" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_019c7752-4c23-74c4-8127-4b5dd46d7c05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPensionPbsAssistedPlanMember_019c7758-4767-7822-953f-71281756f5d1" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPensionPbsAssistedPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansDomain_019c7752-4c23-776b-8d02-3fe14ad6e533" xlink:to="loc_viv_DefinedBenefitPensionPbsAssistedPlanMember_019c7758-4767-7822-953f-71281756f5d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PensionPlanAndOtherPostEmploymentBenefitLiabilities_019c774a-7b66-70a9-b85a-856036ee3577" xlink:href="viv-20251231.xsd#viv_PensionPlanAndOtherPostEmploymentBenefitLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_PensionPlanAndOtherPostEmploymentBenefitLiabilities_019c774a-7b66-70a9-b85a-856036ee3577" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue_019c7748-f2ac-734e-8515-1ef65854bc30" xlink:href="viv-20251231.xsd#viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue_019c7748-f2ac-734e-8515-1ef65854bc30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue_019c7749-f36d-7457-bd19-3a264d4276ad" xlink:href="viv-20251231.xsd#viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityToPresentValue_019c7749-f36d-7457-bd19-3a264d4276ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate_019c774e-8ba5-72cc-8c5e-a5b0db818782" xlink:href="viv-20251231.xsd#viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_IncreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate_019c774e-8ba5-72cc-8c5e-a5b0db818782" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate_019c7750-6714-7a16-846e-d53a7decd30e" xlink:href="viv-20251231.xsd#viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_DecreaseInTheDiscountRateUsedToAdjustTheDefinedBenefitLiabilityInTheMedicalCostGrowthRate_019c7750-6714-7a16-846e-d53a7decd30e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MonthlyPaymentsOfAssetsSurplusOfPostEmploymentBenefitsPlans_019c7762-7473-7ee0-b324-560c8339a1d0" xlink:href="viv-20251231.xsd#viv_MonthlyPaymentsOfAssetsSurplusOfPostEmploymentBenefitsPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_MonthlyPaymentsOfAssetsSurplusOfPostEmploymentBenefitsPlans_019c7762-7473-7ee0-b324-560c8339a1d0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AssetsSurplusOfPostEmploymentBenefitPlans_019c775f-2a1f-79f6-b06b-822538c8f730" xlink:href="viv-20251231.xsd#viv_AssetsSurplusOfPostEmploymentBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_AssetsSurplusOfPostEmploymentBenefitPlans_019c775f-2a1f-79f6-b06b-822538c8f730" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge_019c7751-43c3-746d-9940-538081699786" xlink:href="viv-20251231.xsd#viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_AnnualIncreaseInTheUseOfMedicalServicesAccordingToAge_019c7751-43c3-746d-9940-538081699786" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans_019c7751-9255-7496-bf57-f5f073f73c5f" xlink:href="viv-20251231.xsd#viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_LongTermInflationRateInPostRetirementPensionAndHealthPlans_019c7751-9255-7496-bf57-f5f073f73c5f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentIncomeTaxAndSocialContribution_019c7752-4c23-7fe2-ace4-18445e905099" xlink:href="viv-20251231.xsd#viv_CurrentIncomeTaxAndSocialContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_CurrentIncomeTaxAndSocialContribution_019c7752-4c23-7fe2-ace4-18445e905099" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome_019c7752-a5e0-7699-ae0f-112276fede49" xlink:href="viv-20251231.xsd#viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_OthersDeferredIncomeTaxAndSocialContributionTaxExpenseIncome_019c7752-a5e0-7699-ae0f-112276fede49" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome_019c7752-d7be-76e2-a2bb-dc62d872ef0d" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_IncomeTaxAndSocialContributionLeviedOnAllAmountsRecognizedInOtherComprehensiveIncome_019c7752-d7be-76e2-a2bb-dc62d872ef0d" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EmployersContributionToDefinedContributionPlan_019c7754-95f1-7fbe-8d71-2e588e309ada" xlink:href="viv-20251231.xsd#viv_EmployersContributionToDefinedContributionPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_EmployersContributionToDefinedContributionPlan_019c7754-95f1-7fbe-8d71-2e588e309ada" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherComprehensiveIncomeNetOfTaxesThroughChangesInTheHealthPlanForEmployeesAndRetirees_019c7754-c587-785c-a735-a175cb0a9ae2" xlink:href="viv-20251231.xsd#viv_OtherComprehensiveIncomeNetOfTaxesThroughChangesInTheHealthPlanForEmployeesAndRetirees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_OtherComprehensiveIncomeNetOfTaxesThroughChangesInTheHealthPlanForEmployeesAndRetirees_019c7754-c587-785c-a735-a175cb0a9ae2" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DeferredIncomeTaxAndSocialContributionThroughChangesInTheHealthPlanForEmployeesAndRetirees_019c7754-c587-725b-8e88-71e0cfd2d335" xlink:href="viv-20251231.xsd#viv_DeferredIncomeTaxAndSocialContributionThroughChangesInTheHealthPlanForEmployeesAndRetirees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_DeferredIncomeTaxAndSocialContributionThroughChangesInTheHealthPlanForEmployeesAndRetirees_019c7754-c587-725b-8e88-71e0cfd2d335" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GeneralAndAdministrativeExpensesThroughPersonnelExpensesChargesAndSocialBenefits_019c7754-c587-7307-984a-a042cb259639" xlink:href="viv-20251231.xsd#viv_GeneralAndAdministrativeExpensesThroughPersonnelExpensesChargesAndSocialBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_GeneralAndAdministrativeExpensesThroughPersonnelExpensesChargesAndSocialBenefits_019c7754-c587-7307-984a-a042cb259639" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPlansDistributionOfReservesCompanySParticipation_019c7758-4767-7723-95a0-5f5acdfe0ea2" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPlansDistributionOfReservesCompanySParticipation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_DefinedBenefitPlansDistributionOfReservesCompanySParticipation_019c7758-4767-7723-95a0-5f5acdfe0ea2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherComprehensiveIncomeEquity_019c7765-65df-7e01-a617-0b9acba9e3a7" xlink:href="viv-20251231.xsd#viv_OtherComprehensiveIncomeEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_OtherComprehensiveIncomeEquity_019c7765-65df-7e01-a617-0b9acba9e3a7" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IncomeTaxAndSocialContributionPayable_019c7765-65df-77fd-8837-6f5a81ab0c46" xlink:href="viv-20251231.xsd#viv_IncomeTaxAndSocialContributionPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_IncomeTaxAndSocialContributionPayable_019c7765-65df-77fd-8837-6f5a81ab0c46" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DefinedBenefitPlansDistributionOfReservesNumberOfMonthlyPayments_019c7769-37b5-74ea-9858-7a0da2dc50ee" xlink:href="viv-20251231.xsd#viv_DefinedBenefitPlansDistributionOfReservesNumberOfMonthlyPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems_019c7748-f2ac-7b6c-b0a4-6cd8f0be092d" xlink:to="loc_viv_DefinedBenefitPlansDistributionOfReservesNumberOfMonthlyPayments_019c7769-37b5-74ea-9858-7a0da2dc50ee" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/SHAREBASEDPAYMENTPLANSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#SHAREBASEDPAYMENTPLANSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/SHAREBASEDPAYMENTPLANSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c43ba-2171-753c-ae4a-d94f348c70fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c43ba-2171-753c-ae4a-d94f348c70fd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c43f1-eca4-7a78-ac43-bccb06d5c1f5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_019c43ba-2171-753c-ae4a-d94f348c70fd" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c43f1-eca4-7a78-ac43-bccb06d5c1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f1-eca4-7a78-ac43-bccb06d5c1f5_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c43f1-eca4-7a78-ac43-bccb06d5c1f5" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f1-eca4-7a78-ac43-bccb06d5c1f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_019c43f1-eca4-7a78-ac43-bccb06d5c1f5" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TFSP20232025CycleMember_019c43f5-2ef2-7023-a7bb-aa1eeef82009" xlink:href="viv-20251231.xsd#viv_TFSP20232025CycleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_TFSP20232025CycleMember_019c43f5-2ef2-7023-a7bb-aa1eeef82009" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TFSP20242026CycleMember_019c43fb-09c6-7261-b82b-4eb7e6e1306d" xlink:href="viv-20251231.xsd#viv_TFSP20242026CycleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_TFSP20242026CycleMember_019c43fb-09c6-7261-b82b-4eb7e6e1306d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TFSP20252027CycleMember_019c43fc-933f-77d0-83ce-eb307c83cc92" xlink:href="viv-20251231.xsd#viv_TFSP20252027CycleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_TFSP20252027CycleMember_019c43fc-933f-77d0-83ce-eb307c83cc92" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSPCycle20232025Member_019c43fe-68e9-7626-92fb-024f770860ed" xlink:href="viv-20251231.xsd#viv_PSPCycle20232025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSPCycle20232025Member_019c43fe-68e9-7626-92fb-024f770860ed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSPCycle20242026Member_019c4402-ef8b-76e3-8d97-347e9ccbc16e" xlink:href="viv-20251231.xsd#viv_PSPCycle20242026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSPCycle20242026Member_019c4402-ef8b-76e3-8d97-347e9ccbc16e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSP20242026IICycleMember_019c4421-29f2-736a-933c-6b74fa6dfd04" xlink:href="viv-20251231.xsd#viv_PSP20242026IICycleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSP20242026IICycleMember_019c4421-29f2-736a-933c-6b74fa6dfd04" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSPVIVOCycle20232025Member_019c4423-4eac-799f-bfb8-f4b5da88cbfa" xlink:href="viv-20251231.xsd#viv_PSPVIVOCycle20232025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSPVIVOCycle20232025Member_019c4423-4eac-799f-bfb8-f4b5da88cbfa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSPVIVOCycle20242026Member_019c4428-0f38-787c-b911-b6db7070b94d" xlink:href="viv-20251231.xsd#viv_PSPVIVOCycle20242026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSPVIVOCycle20242026Member_019c4428-0f38-787c-b911-b6db7070b94d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PSPVIVOCycle20252027Member_019c442a-4c95-79ee-bbda-05f22281e0c6" xlink:href="viv-20251231.xsd#viv_PSPVIVOCycle20252027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsDomain_019c43f2-2d36-7ebe-b846-7a2d475a323f" xlink:to="loc_viv_PSPVIVOCycle20252027Member_019c442a-4c95-79ee-bbda-05f22281e0c6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageSharePrice2019_019c446e-9f3a-7b77-a580-204b6287815e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WeightedAverageSharePrice2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_ifrs-full_WeightedAverageSharePrice2019_019c446e-9f3a-7b77-a580-204b6287815e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareBasedPaymentArrangementNumberOfSharesThatEachUnitConsists_019c43ef-e7b7-71c2-a8b2-a6d42bb20df7" xlink:href="viv-20251231.xsd#viv_ShareBasedPaymentArrangementNumberOfSharesThatEachUnitConsists"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_viv_ShareBasedPaymentArrangementNumberOfSharesThatEachUnitConsists_019c43ef-e7b7-71c2-a8b2-a6d42bb20df7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfActiveCompanyExecutives_019c4453-311a-7257-8b46-575dc5da6e84" xlink:href="viv-20251231.xsd#viv_NumberOfActiveCompanyExecutives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_viv_NumberOfActiveCompanyExecutives_019c4453-311a-7257-8b46-575dc5da6e84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfExecutivesAppointedUnderCompanySBylaws_019c4466-7a24-7404-bd6f-82d2443c83f2" xlink:href="viv-20251231.xsd#viv_NumberOfExecutivesAppointedUnderCompanySBylaws"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_viv_NumberOfExecutivesAppointedUnderCompanySBylaws_019c4466-7a24-7404-bd6f-82d2443c83f2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_019c4471-682d-7d55-808b-ab2497a0cfc7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_ifrs-full_ExpenseFromSharebasedPaymentTransactionsWithEmployees_019c4471-682d-7d55-808b-ab2497a0cfc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans_019c4471-d113-7710-b3bc-3ebd0cb8b9ee" xlink:href="viv-20251231.xsd#viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_019c43ba-9d8c-7b6a-9a3f-1ccf1c6e84cc" xlink:to="loc_viv_ConsolidatedLiabilityBalancesOfTheShareCompensationPlans_019c4471-d113-7710-b3bc-3ebd0cb8b9ee" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails1" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails1"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfHedgeAccountingLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfHedgeAccountingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis_019c4274-2dad-7575-90e9-3369346a84f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:to="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis_019c4274-2dad-7575-90e9-3369346a84f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7575-90e9-3369346a84f7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis_019c4274-2dad-7575-90e9-3369346a84f7" xlink:to="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7575-90e9-3369346a84f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7e18-a7ce-8936d649d1b6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentAxis_019c4274-2dad-7575-90e9-3369346a84f7" xlink:to="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7e18-a7ce-8936d649d1b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PurchasedCallOptionsMember_019c4274-2dad-7a86-bf15-c48f882ae349" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PurchasedCallOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7e18-a7ce-8936d649d1b6" xlink:to="loc_ifrs-full_PurchasedCallOptionsMember_019c4274-2dad-7a86-bf15-c48f882ae349" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WrittenPutOptionsMember_019c4274-2dad-77c5-a5b1-e49c9ebed348" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_WrittenPutOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ContinuingInvolvementInDerecognisedFinancialAssetsByTypeOfInstrumentDomain_019c4274-2dad-7e18-a7ce-8936d649d1b6" xlink:to="loc_ifrs-full_WrittenPutOptionsMember_019c4274-2dad-77c5-a5b1-e49c9ebed348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsAxis_019c4274-2dad-7d3d-a825-1ad916fff04d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:to="loc_ifrs-full_HedgingInstrumentsAxis_019c4274-2dad-7d3d-a825-1ad916fff04d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-7d3d-a825-1ad916fff04d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c4274-2dad-7d3d-a825-1ad916fff04d" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-7d3d-a825-1ad916fff04d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_HedgingInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_HedgingInstrumentsAxis_019c4274-2dad-7d3d-a825-1ad916fff04d" xlink:to="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencySwapsEuroAndCDIXEuroMember_019c4274-2dad-7744-a68c-db74ecd1b617" xlink:href="viv-20251231.xsd#viv_ForeignCurrencySwapsEuroAndCDIXEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:to="loc_viv_ForeignCurrencySwapsEuroAndCDIXEuroMember_019c4274-2dad-7744-a68c-db74ecd1b617" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencySwapsUSAndCDIXUSMember_019c4274-2dad-7bc6-82c0-82b546ecd67c" xlink:href="viv-20251231.xsd#viv_ForeignCurrencySwapsUSAndCDIXUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:to="loc_viv_ForeignCurrencySwapsUSAndCDIXUSMember_019c4274-2dad-7bc6-82c0-82b546ecd67c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencySwapsEuroMember_019c4274-2dad-79d4-a658-cf60ae6a146b" xlink:href="viv-20251231.xsd#viv_ForeignCurrencySwapsEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:to="loc_viv_ForeignCurrencySwapsEuroMember_019c4274-2dad-79d4-a658-cf60ae6a146b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencySwapsUSMember_019c4274-2dad-7d91-aefe-16bb30a8db03" xlink:href="viv-20251231.xsd#viv_ForeignCurrencySwapsUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:to="loc_viv_ForeignCurrencySwapsUSMember_019c4274-2dad-7d91-aefe-16bb30a8db03" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IPCAXCDISwapMember_019c4953-1a45-7a5e-aef9-3730a7308266" xlink:href="viv-20251231.xsd#viv_IPCAXCDISwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_HedgingInstrumentsDomain_019c4274-2dad-739b-964a-3a42b61e002c" xlink:to="loc_viv_IPCAXCDISwapMember_019c4953-1a45-7a5e-aef9-3730a7308266" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019c4274-2dad-7181-aad2-fc1fdad32f02" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:to="loc_srt_CurrencyAxis_019c4274-2dad-7181-aad2-fc1fdad32f02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2dad-7181-aad2-fc1fdad32f02_default" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019c4274-2dad-7181-aad2-fc1fdad32f02" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2dad-7181-aad2-fc1fdad32f02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019c4274-2dad-7181-aad2-fc1fdad32f02" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencyMember_019c4274-2dad-77f7-bc97-3d6117e02681" xlink:href="viv-20251231.xsd#viv_ForeignCurrencyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:to="loc_viv_ForeignCurrencyMember_019c4274-2dad-77f7-bc97-3d6117e02681" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NdfUsdMember_019c4274-2dad-7442-85a1-2d4f5db9edfb" xlink:href="viv-20251231.xsd#viv_NdfUsdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:to="loc_viv_NdfUsdMember_019c4274-2dad-7442-85a1-2d4f5db9edfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_USD_019c4274-2dad-7496-92aa-2d20ce35f90b" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_USD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:to="loc_currency_USD_019c4274-2dad-7496-92aa-2d20ce35f90b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_019c4274-2dad-7b50-9f8d-e5001e7673e0" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7864-9799-25051e8bda4f" xlink:to="loc_currency_EUR_019c4274-2dad-7b50-9f8d-e5001e7673e0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-75ff-9033-78bc3e5de841" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingTable_019c4274-2dad-7e55-8653-f0480685d20e" xlink:to="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-75ff-9033-78bc3e5de841" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-75ff-9033-78bc3e5de841_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-75ff-9033-78bc3e5de841" xlink:to="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-75ff-9033-78bc3e5de841_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-75ff-9033-78bc3e5de841" xlink:to="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7e14-b4e5-5bb9782e24ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FloatingInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7e14-b4e5-5bb9782e24ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FixedInterestRateMember_019c4274-2dad-7c34-a349-8f5996ee86d7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FixedInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_ifrs-full_FixedInterestRateMember_019c4274-2dad-7c34-a349-8f5996ee86d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NdfUsdRateMember_019c4274-2dad-7d8a-b031-a96331f29c31" xlink:href="viv-20251231.xsd#viv_NdfUsdRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_NdfUsdRateMember_019c4274-2dad-7d8a-b031-a96331f29c31" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterbankDepositCertificateRateMember_019c4274-2dad-74e9-9328-1014cef54281" xlink:href="viv-20251231.xsd#viv_InterbankDepositCertificateRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_InterbankDepositCertificateRateMember_019c4274-2dad-74e9-9328-1014cef54281" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InflationInterestRateMember_019c4274-2dad-78c5-b860-63b719e0445f" xlink:href="viv-20251231.xsd#viv_InflationInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_InflationInterestRateMember_019c4274-2dad-78c5-b860-63b719e0445f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BoardConsumerPriceIndexMember_019c4274-2dad-7fd7-8725-97855e21f7de" xlink:href="viv-20251231.xsd#viv_BoardConsumerPriceIndexMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_BoardConsumerPriceIndexMember_019c4274-2dad-7fd7-8725-97855e21f7de" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EuriborMember_019c4274-2dad-7dd0-a279-1192899fa050" xlink:href="viv-20251231.xsd#viv_EuriborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_EuriborMember_019c4274-2dad-7dd0-a279-1192899fa050" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PreRateMember_019c494a-6c11-737a-bcc8-6b68df56641c" xlink:href="viv-20251231.xsd#viv_PreRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_PreRateMember_019c494a-6c11-737a-bcc8-6b68df56641c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NDFCopperMember_019c494a-fb9d-7b24-b805-dbf875181f4b" xlink:href="viv-20251231.xsd#viv_NDFCopperMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7031-9040-d570efe40024" xlink:to="loc_viv_NDFCopperMember_019c494a-fb9d-7b24-b805-dbf875181f4b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_019c4274-2dad-760c-ba51-0ee2cd77bdec" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_NotionalAmount_019c4274-2dad-760c-ba51-0ee2cd77bdec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialAssets_019c4274-2dad-7700-aafe-58f80681d5f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_DerivativeFinancialAssets_019c4274-2dad-7700-aafe-58f80681d5f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NotionalValueForDerivativeLiabilities_019c4274-2dad-7253-acd9-60a963c86c7f" xlink:href="viv-20251231.xsd#viv_NotionalValueForDerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_NotionalValueForDerivativeLiabilities_019c4274-2dad-7253-acd9-60a963c86c7f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilities_019c4274-2dad-7d55-8bbe-ba686599ab64" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_DerivativeFinancialLiabilities_019c4274-2dad-7d55-8bbe-ba686599ab64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialAssetsHeldForHedging_019c4274-2dad-7ade-9070-8feadea2034a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialAssetsHeldForHedging"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_DerivativeFinancialAssetsHeldForHedging_019c4274-2dad-7ade-9070-8feadea2034a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialAssets_019c4274-2dad-76b8-aae1-8ee5b4f6cd91" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentDerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialAssets_019c4274-2dad-76b8-aae1-8ee5b4f6cd91" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentDerivativeFinancialAssets_019c4274-2dad-75b3-bc0c-e16c4f9891a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentDerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_NoncurrentDerivativeFinancialAssets_019c4274-2dad-75b3-bc0c-e16c4f9891a6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging_019c4274-2dad-7d3b-ba2a-87b5780bc0b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_DerivativeFinancialLiabilitiesHeldForHedging_019c4274-2dad-7d3b-ba2a-87b5780bc0b0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_019c4274-2dad-7bc5-9497-950ae7e5e35c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_019c4274-2dad-7bc5-9497-950ae7e5e35c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities_019c4274-2dad-703b-a1ac-e712a4ff327f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities_019c4274-2dad-703b-a1ac-e712a4ff327f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-7820-935e-29148865e74c" xlink:href="viv-20251231.xsd#viv_DerivativeAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-7820-935e-29148865e74c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c4274-2dad-7464-80d2-dbff997d4ec3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_ifrs-full_Borrowings_019c4274-2dad-7464-80d2-dbff997d4ec3" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetAmountPayableOnCurrencyRisk_019c4274-2dad-755a-a083-eb11fdba8541" xlink:href="viv-20251231.xsd#viv_NetAmountPayableOnCurrencyRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_NetAmountPayableOnCurrencyRisk_019c4274-2dad-755a-a083-eb11fdba8541" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetAmountReceivableOnCurrencyRisk_019c4274-2dad-7b86-87dd-027197c58c47" xlink:href="viv-20251231.xsd#viv_NetAmountReceivableOnCurrencyRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_NetAmountReceivableOnCurrencyRisk_019c4274-2dad-7b86-87dd-027197c58c47" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BookValueOfExchangeRisk_019c4274-2dad-717e-9f92-8077961a0ecc" xlink:href="viv-20251231.xsd#viv_BookValueOfExchangeRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_BookValueOfExchangeRisk_019c4274-2dad-717e-9f92-8077961a0ecc" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NotionalValueForDerivativeAssets_019c4274-2dad-7821-a903-087d862c6b32" xlink:href="viv-20251231.xsd#viv_NotionalValueForDerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_NotionalValueForDerivativeAssets_019c4274-2dad-7821-a903-087d862c6b32" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BookValueOfExchangePayable_019c4274-2dad-7c2a-a934-a14aa29579f7" xlink:href="viv-20251231.xsd#viv_BookValueOfExchangePayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_BookValueOfExchangePayable_019c4274-2dad-7c2a-a934-a14aa29579f7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TransactionValueOfExchangeRisk_019c4274-2dad-740d-955e-8fd86cf44d64" xlink:href="viv-20251231.xsd#viv_TransactionValueOfExchangeRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfHedgeAccountingLineItems_019c4274-2dad-7e58-8d5b-fcf3835e3eda" xlink:to="loc_viv_TransactionValueOfExchangeRisk_019c4274-2dad-740d-955e-8fd86cf44d64" xlink:type="arc" order="17"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails2" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails2"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails2" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:href="viv-20251231.xsd#viv_NetChangesOfDerivativeFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-74c6-b061-4ae8cd211468" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-74c6-b061-4ae8cd211468" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetChangesOfDerivativeFinancialInstrumentsAxis_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c" xlink:href="viv-20251231.xsd#viv_NetChangesOfDerivativeFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-74c6-b061-4ae8cd211468" xlink:to="loc_viv_NetChangesOfDerivativeFinancialInstrumentsAxis_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetChangesOfDerivativeFinancialInstrumentsDomain_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c_default" xlink:href="viv-20251231.xsd#viv_NetChangesOfDerivativeFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsAxis_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c" xlink:to="loc_viv_NetChangesOfDerivativeFinancialInstrumentsDomain_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetChangesOfDerivativeFinancialInstrumentsDomain_019c4274-2dad-71b2-b9ed-6ffe38194e8a" xlink:href="viv-20251231.xsd#viv_NetChangesOfDerivativeFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsAxis_019c4274-2dad-71d9-8ebc-d8d0f8b21b5c" xlink:to="loc_viv_NetChangesOfDerivativeFinancialInstrumentsDomain_019c4274-2dad-71b2-b9ed-6ffe38194e8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivateFinancialInstrumentsMember_019c4274-2dad-7424-9210-f7fbde723e73" xlink:href="viv-20251231.xsd#viv_DerivateFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsDomain_019c4274-2dad-71b2-b9ed-6ffe38194e8a" xlink:to="loc_viv_DerivateFinancialInstrumentsMember_019c4274-2dad-7424-9210-f7fbde723e73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-7237-8638-e2171171afc3" xlink:href="viv-20251231.xsd#viv_DerivativeAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-7237-8638-e2171171afc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PaymentsForDerivativeFinancialInstruments_019c4274-2dad-7597-ad0a-31d546d909a6" xlink:href="viv-20251231.xsd#viv_PaymentsForDerivativeFinancialInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_viv_PaymentsForDerivativeFinancialInstruments_019c4274-2dad-7597-ad0a-31d546d909a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProceedsFromDerivativeFinancialInstruments_019c4274-2dad-7858-b4fe-31c2bf244d43" xlink:href="viv-20251231.xsd#viv_ProceedsFromDerivativeFinancialInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_viv_ProceedsFromDerivativeFinancialInstruments_019c4274-2dad-7858-b4fe-31c2bf244d43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives_019c4274-2dad-79f5-a4ae-ce73360981b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_ifrs-full_AdjustmentsForGainsLossesOnChangeInFairValueOfDerivatives_019c4274-2dad-79f5-a4ae-ce73360981b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdjustmentsForFairValueGainsLosses_019c4274-2dad-7f7b-b185-9da3dcf702ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_AdjustmentsForFairValueGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_NetChangesOfDerivativeFinancialInstrumentsLineItems_019c4274-2dad-7126-acae-2ac78280eeb5" xlink:to="loc_ifrs-full_AdjustmentsForFairValueGainsLosses_019c4274-2dad-7f7b-b185-9da3dcf702ac" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-735d-a77d-44590040dccf" xlink:href="viv-20251231.xsd#viv_DerivativeAssetsLiabilitiesNet"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails3" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails3"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails3" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c4274-2dad-73c6-99a1-a97b65b83553" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-76ac-872b-9304087b9a09" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c4274-2dad-73c6-99a1-a97b65b83553" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-76ac-872b-9304087b9a09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dad-7c5c-bc9c-4eed961e32ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-76ac-872b-9304087b9a09" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dad-7c5c-bc9c-4eed961e32ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dad-7c5c-bc9c-4eed961e32ad_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dad-7c5c-bc9c-4eed961e32ad" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dad-7c5c-bc9c-4eed961e32ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dad-7e4d-998d-f168005a27b9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_019c4274-2dad-7c5c-bc9c-4eed961e32ad" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dad-7e4d-998d-f168005a27b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsDomain_019c4274-2dad-7e4d-998d-f168005a27b9" xlink:to="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BoardConsumerPriceIndexSwapContractMember_019c4274-2dad-7854-865f-ea0e58d94618" xlink:href="viv-20251231.xsd#viv_BoardConsumerPriceIndexSwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:to="loc_viv_BoardConsumerPriceIndexSwapContractMember_019c4274-2dad-7854-865f-ea0e58d94618" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EuriborXCDIMember_019c4274-2dad-7dde-80e3-1537c23abdad" xlink:href="viv-20251231.xsd#viv_EuriborXCDIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:to="loc_viv_EuriborXCDIMember_019c4274-2dad-7dde-80e3-1537c23abdad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ForeignCurrencySwapContractMember_019c4274-2dad-7d13-9c15-5ae2b12b2738" xlink:href="viv-20251231.xsd#viv_ForeignCurrencySwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:to="loc_viv_ForeignCurrencySwapContractMember_019c4274-2dad-7d13-9c15-5ae2b12b2738" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NDFCopperXPreMember_019c4962-902d-705c-91e8-5298537a1c72" xlink:href="viv-20251231.xsd#viv_NDFCopperXPreMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:to="loc_viv_NDFCopperXPreMember_019c4962-902d-705c-91e8-5298537a1c72" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterbankDepositCertificateRateSwapContractMember_019c4274-2dad-79bb-be71-ca6dc396671a" xlink:href="viv-20251231.xsd#viv_InterbankDepositCertificateRateSwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SwapContractMember_019c4274-2dad-7e87-ab99-b1f12bbe4d3a" xlink:to="loc_viv_InterbankDepositCertificateRateSwapContractMember_019c4274-2dad-79bb-be71-ca6dc396671a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2dad-7544-a6c6-fdae898ef711" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_019c4274-2dad-76ac-872b-9304087b9a09" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2dad-7544-a6c6-fdae898ef711" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2dad-7544-a6c6-fdae898ef711_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2dad-7544-a6c6-fdae898ef711" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2dad-7544-a6c6-fdae898ef711_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2dad-7544-a6c6-fdae898ef711" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2dad-792a-9add-7c18dd9c76a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2dad-792a-9add-7c18dd9c76a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2dad-7736-9de5-c239fac2229f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2dad-7736-9de5-c239fac2229f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2dad-7f5a-924e-96a70bfd55ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2dad-7f5a-924e-96a70bfd55ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2dad-70b1-b4ca-fb12f17ac1dc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2dad-70b1-b4ca-fb12f17ac1dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2dad-7b2d-9c02-58a9a7e306ae" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2dad-7b2d-9c02-58a9a7e306ae" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2dad-7a77-a3fc-2448ad0fca38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2dad-7ef2-97b6-69fb566f63ed" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2dad-7a77-a3fc-2448ad0fca38" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-718a-9283-bfd56edfc15d" xlink:href="viv-20251231.xsd#viv_DerivativeAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c4274-2dad-73c6-99a1-a97b65b83553" xlink:to="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2dad-718a-9283-bfd56edfc15d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnHedgeIneffectiveness_019c4274-2dad-7578-a11a-b3d63da04c84" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_GainLossOnHedgeIneffectiveness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_019c4274-2dad-73c6-99a1-a97b65b83553" xlink:to="loc_ifrs-full_GainLossOnHedgeIneffectiveness_019c4274-2dad-7578-a11a-b3d63da04c84" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails4" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails4"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails4" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_019c4274-2dad-71f7-b2af-da90d4b96543" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_019c4274-2dad-71f7-b2af-da90d4b96543" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c4274-2dad-7fea-85fe-cd0278fa634a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_019c4274-2dad-71f7-b2af-da90d4b96543" xlink:to="loc_srt_StatementScenarioAxis_019c4274-2dad-7fea-85fe-cd0278fa634a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7fea-85fe-cd0278fa634a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2dad-7fea-85fe-cd0278fa634a" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7fea-85fe-cd0278fa634a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7a81-b95e-e3cdee996e4e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2dad-7fea-85fe-cd0278fa634a" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7a81-b95e-e3cdee996e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioLikelyMember_019c4274-2dad-72f6-a8a2-8e4ccc712b06" xlink:href="viv-20251231.xsd#viv_ScenarioLikelyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7a81-b95e-e3cdee996e4e" xlink:to="loc_viv_ScenarioLikelyMember_019c4274-2dad-72f6-a8a2-8e4ccc712b06" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioTwentyFivePercentDownwardVariationMember_019c4274-2dad-7955-ab20-02bb77e1e924" xlink:href="viv-20251231.xsd#viv_ScenarioTwentyFivePercentDownwardVariationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7a81-b95e-e3cdee996e4e" xlink:to="loc_viv_ScenarioTwentyFivePercentDownwardVariationMember_019c4274-2dad-7955-ab20-02bb77e1e924" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioFiftyPercentDownwardVariationMember_019c4274-2dad-7650-a400-e29c2d2394c9" xlink:href="viv-20251231.xsd#viv_ScenarioFiftyPercentDownwardVariationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7a81-b95e-e3cdee996e4e" xlink:to="loc_viv_ScenarioFiftyPercentDownwardVariationMember_019c4274-2dad-7650-a400-e29c2d2394c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c4274-2dad-7eb7-a268-58ba9518065f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingTable_019c4274-2dad-71f7-b2af-da90d4b96543" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c4274-2dad-7eb7-a268-58ba9518065f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c4274-2dad-7eb7-a268-58ba9518065f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c4274-2dad-7eb7-a268-58ba9518065f" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c4274-2dad-7eb7-a268-58ba9518065f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c4274-2dad-7a3d-8563-e5de157e3971" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c4274-2dad-7eb7-a268-58ba9518065f" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c4274-2dad-7a3d-8563-e5de157e3971" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MarketRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c4274-2dad-7a3d-8563-e5de157e3971" xlink:to="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeLongPositionDerivativesDepreciationRiskInEuroMember_019c4274-2dad-7a98-8cd1-d05370ba4bc2" xlink:href="viv-20251231.xsd#viv_HedgeLongPositionDerivativesDepreciationRiskInEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeLongPositionDerivativesDepreciationRiskInEuroMember_019c4274-2dad-7a98-8cd1-d05370ba4bc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtAppreciationRiskForPayablesInEuroMember_019c4274-2dad-7925-b731-4792b698ce64" xlink:href="viv-20251231.xsd#viv_DebtAppreciationRiskForPayablesInEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtAppreciationRiskForPayablesInEuroMember_019c4274-2dad-7925-b731-4792b698ce64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtDepreciationRiskForReceivablesInEuroMember_019c4274-2dad-7583-a924-9c771a1c7ed7" xlink:href="viv-20251231.xsd#viv_DebtDepreciationRiskForReceivablesInEuroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtDepreciationRiskForReceivablesInEuroMember_019c4274-2dad-7583-a924-9c771a1c7ed7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeShortPositionDerivativesDepreciationRiskInUsDollarsMember_019c4274-2dad-7de1-9597-99e583bf63e8" xlink:href="viv-20251231.xsd#viv_HedgeShortPositionDerivativesDepreciationRiskInUsDollarsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeShortPositionDerivativesDepreciationRiskInUsDollarsMember_019c4274-2dad-7de1-9597-99e583bf63e8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtAppreciationRiskForPayablesInUsDollarsMember_019c4274-2dad-7fc2-884a-1b0fb7ecc2f3" xlink:href="viv-20251231.xsd#viv_DebtAppreciationRiskForPayablesInUsDollarsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtAppreciationRiskForPayablesInUsDollarsMember_019c4274-2dad-7fc2-884a-1b0fb7ecc2f3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtDepreciationRiskForReceivablesInUsDollarsMember_019c4274-2dad-7b1d-b77c-35fb086fa3d5" xlink:href="viv-20251231.xsd#viv_DebtDepreciationRiskForReceivablesInUsDollarsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtDepreciationRiskForReceivablesInUsDollarsMember_019c4274-2dad-7b1d-b77c-35fb086fa3d5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CopperHedgeLiabilitiesPositionDerivativesOfHighCopperRiskMember_019c496f-9c0d-7ee5-9a37-83b5ee1c78f5" xlink:href="viv-20251231.xsd#viv_CopperHedgeLiabilitiesPositionDerivativesOfHighCopperRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_CopperHedgeLiabilitiesPositionDerivativesOfHighCopperRiskMember_019c496f-9c0d-7ee5-9a37-83b5ee1c78f5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtRiskOfAFallInCopperPricesMember_019c4970-bee1-70e6-8170-fc13e89425ce" xlink:href="viv-20251231.xsd#viv_DebtRiskOfAFallInCopperPricesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtRiskOfAFallInCopperPricesMember_019c4970-bee1-70e6-8170-fc13e89425ce" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeLongPositionDerivativesRiskOfDecreaseRiskInIpcaMember_019c4274-2dad-7d34-9548-5d126aa3fce1" xlink:href="viv-20251231.xsd#viv_HedgeLongPositionDerivativesRiskOfDecreaseRiskInIpcaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeLongPositionDerivativesRiskOfDecreaseRiskInIpcaMember_019c4274-2dad-7d34-9548-5d126aa3fce1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtRiskOfIncreaseInIpcaMember_019c4274-2dad-7d52-bf89-63e8d2be88d9" xlink:href="viv-20251231.xsd#viv_DebtRiskOfIncreaseInIpcaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtRiskOfIncreaseInIpcaMember_019c4274-2dad-7d52-bf89-63e8d2be88d9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeActivePositionDerivativesRiskOfEuriborDropMember_019c4274-2dad-7022-b756-ae074bc496e0" xlink:href="viv-20251231.xsd#viv_HedgeActivePositionDerivativesRiskOfEuriborDropMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeActivePositionDerivativesRiskOfEuriborDropMember_019c4274-2dad-7022-b756-ae074bc496e0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebtRiskOfEuriborIncreaseMember_019c4274-2dad-7ad6-b6ca-0fd0813655cd" xlink:href="viv-20251231.xsd#viv_DebtRiskOfEuriborIncreaseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_DebtRiskOfEuriborIncreaseMember_019c4274-2dad-7ad6-b6ca-0fd0813655cd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeUSAndEuroLiabilitiesPositionDerivativeRiskDecreaseInCDIMember_019c4274-2dad-7044-a7af-2c6793a0a491" xlink:href="viv-20251231.xsd#viv_HedgeUSAndEuroLiabilitiesPositionDerivativeRiskDecreaseInCDIMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeUSAndEuroLiabilitiesPositionDerivativeRiskDecreaseInCDIMember_019c4274-2dad-7044-a7af-2c6793a0a491" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_HedgeIpcaShortPositionDerivativesRiskOfIncreaseInCdiMember_019c4274-2dad-7959-a6e0-24c882a139be" xlink:href="viv-20251231.xsd#viv_HedgeIpcaShortPositionDerivativesRiskOfIncreaseInCdiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MarketRiskMember_019c4274-2dad-7838-bec3-8e510fe295f0" xlink:to="loc_viv_HedgeIpcaShortPositionDerivativesRiskOfIncreaseInCdiMember_019c4274-2dad-7959-a6e0-24c882a139be" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureInEuroMarketRisk_019c4274-2dad-75be-9c55-ba78fa37df63" xlink:href="viv-20251231.xsd#viv_NetExposureInEuroMarketRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureInEuroMarketRisk_019c4274-2dad-75be-9c55-ba78fa37df63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureInUsDollarsHedgeShortPositionMarketRisk_019c4274-2dad-780e-91ba-1c13f224ac7b" xlink:href="viv-20251231.xsd#viv_NetExposureInUsDollarsHedgeShortPositionMarketRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureInUsDollarsHedgeShortPositionMarketRisk_019c4274-2dad-780e-91ba-1c13f224ac7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureCopperRisk_019c4977-d81c-706c-9e51-7b293590b803" xlink:href="viv-20251231.xsd#viv_NetExposureCopperRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureCopperRisk_019c4977-d81c-706c-9e51-7b293590b803" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureInIpcaMarketRisk_019c4274-2dad-7dcb-b66b-e1942fafac49" xlink:href="viv-20251231.xsd#viv_NetExposureInIpcaMarketRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureInIpcaMarketRisk_019c4274-2dad-7dcb-b66b-e1942fafac49" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureInIPCAEuriborDropRisk_019c49e5-ddfc-7419-95ec-0c9725b46753" xlink:href="viv-20251231.xsd#viv_NetExposureInIPCAEuriborDropRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureInIPCAEuriborDropRisk_019c49e5-ddfc-7419-95ec-0c9725b46753" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureInHedgeCdiPositionMarketRisk_019c4274-2dad-7a45-87f5-67ea4243abb6" xlink:href="viv-20251231.xsd#viv_NetExposureInHedgeCdiPositionMarketRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureInHedgeCdiPositionMarketRisk_019c4274-2dad-7a45-87f5-67ea4243abb6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetExposureMarketRisk_019c4274-2dad-7de9-8b2e-e332b28a214d" xlink:href="viv-20251231.xsd#viv_NetExposureMarketRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetExposureMarketRisk_019c4274-2dad-7de9-8b2e-e332b28a214d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetEffectOnChangesInCurrentFairValueUnderAssumptionsOfInterestRateSensitivityAnalysis_019c4274-2dad-7c03-9b99-220faa8e6e54" xlink:href="viv-20251231.xsd#viv_NetEffectOnChangesInCurrentFairValueUnderAssumptionsOfInterestRateSensitivityAnalysis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems_019c4274-2dad-7855-af0c-abc77b34047d" xlink:to="loc_viv_NetEffectOnChangesInCurrentFairValueUnderAssumptionsOfInterestRateSensitivityAnalysis_019c4274-2dad-7c03-9b99-220faa8e6e54" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails5" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails5"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails5" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_019c4274-2dad-79b7-949f-1996bcad3d54" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable_019c4274-2dad-7abe-b899-70c600deb21f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_019c4274-2dad-79b7-949f-1996bcad3d54" xlink:to="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable_019c4274-2dad-7abe-b899-70c600deb21f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c4274-2dad-70ae-880c-b49805e7a438" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable_019c4274-2dad-7abe-b899-70c600deb21f" xlink:to="loc_srt_StatementScenarioAxis_019c4274-2dad-70ae-880c-b49805e7a438" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-70ae-880c-b49805e7a438_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2dad-70ae-880c-b49805e7a438" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-70ae-880c-b49805e7a438_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7799-a910-098677d44d5f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c4274-2dad-70ae-880c-b49805e7a438" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7799-a910-098677d44d5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioLikelyMember_019c4274-2dad-7dbf-b5b4-c9649b31605e" xlink:href="viv-20251231.xsd#viv_ScenarioLikelyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7799-a910-098677d44d5f" xlink:to="loc_viv_ScenarioLikelyMember_019c4274-2dad-7dbf-b5b4-c9649b31605e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioTwentyFivePercentDownwardVariationMember_019c4274-2dad-771e-910a-db9d664aeb41" xlink:href="viv-20251231.xsd#viv_ScenarioTwentyFivePercentDownwardVariationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7799-a910-098677d44d5f" xlink:to="loc_viv_ScenarioTwentyFivePercentDownwardVariationMember_019c4274-2dad-771e-910a-db9d664aeb41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ScenarioFiftyPercentDownwardVariationMember_019c4274-2dad-7e5d-8f17-3a88fdaed00a" xlink:href="viv-20251231.xsd#viv_ScenarioFiftyPercentDownwardVariationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c4274-2dad-7799-a910-098677d44d5f" xlink:to="loc_viv_ScenarioFiftyPercentDownwardVariationMember_019c4274-2dad-7e5d-8f17-3a88fdaed00a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019c4274-2dad-76a4-8a77-6d124cc8f2ef" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable_019c4274-2dad-7abe-b899-70c600deb21f" xlink:to="loc_srt_CurrencyAxis_019c4274-2dad-76a4-8a77-6d124cc8f2ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2dad-76a4-8a77-6d124cc8f2ef_default" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019c4274-2dad-76a4-8a77-6d124cc8f2ef" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2dad-76a4-8a77-6d124cc8f2ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c4274-2dad-7d1c-b439-24b2e4cf0f8c" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019c4274-2dad-76a4-8a77-6d124cc8f2ef" xlink:to="loc_currency_AllCurrenciesDomain_019c4274-2dad-7d1c-b439-24b2e4cf0f8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_USD_019c4274-2dad-705d-95eb-a93bf9a5bd3f" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_USD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7d1c-b439-24b2e4cf0f8c" xlink:to="loc_currency_USD_019c4274-2dad-705d-95eb-a93bf9a5bd3f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_019c4274-2dad-7b31-a738-385fcaea2109" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c4274-2dad-7d1c-b439-24b2e4cf0f8c" xlink:to="loc_currency_EUR_019c4274-2dad-7b31-a738-385fcaea2109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-7138-a365-9df1971c9306" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsTable_019c4274-2dad-7abe-b899-70c600deb21f" xlink:to="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-7138-a365-9df1971c9306" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7138-a365-9df1971c9306_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-7138-a365-9df1971c9306" xlink:to="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7138-a365-9df1971c9306_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7bf3-b3f4-e4ac36895f77" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfInterestRatesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfInterestRatesAxis_019c4274-2dad-7138-a365-9df1971c9306" xlink:to="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7bf3-b3f4-e4ac36895f77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FloatingInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfInterestRatesDomain_019c4274-2dad-7bf3-b3f4-e4ac36895f77" xlink:to="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_BoardConsumerPriceIndexMember_019c4274-2dad-77e3-b16d-d8b80635657e" xlink:href="viv-20251231.xsd#viv_BoardConsumerPriceIndexMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:to="loc_viv_BoardConsumerPriceIndexMember_019c4274-2dad-77e3-b16d-d8b80635657e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_GeneralPriceIndexMarketMember_019c4274-2dad-7e12-add0-fdc270de9cd1" xlink:href="viv-20251231.xsd#viv_GeneralPriceIndexMarketMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:to="loc_viv_GeneralPriceIndexMarketMember_019c4274-2dad-7e12-add0-fdc270de9cd1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterbankDepositCertificateRateMember_019c4274-2dad-7ee5-a97d-0f2cff8c21c5" xlink:href="viv-20251231.xsd#viv_InterbankDepositCertificateRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:to="loc_viv_InterbankDepositCertificateRateMember_019c4274-2dad-7ee5-a97d-0f2cff8c21c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EuriborMember_019c4274-2dad-7d06-95da-54be9807da91" xlink:href="viv-20251231.xsd#viv_EuriborMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:to="loc_viv_EuriborMember_019c4274-2dad-7d06-95da-54be9807da91" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PriceOfCopperTonUSMember_019c4985-1f26-7b47-8c93-17d45cc248d0" xlink:href="viv-20251231.xsd#viv_PriceOfCopperTonUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FloatingInterestRateMember_019c4274-2dad-7b9e-87c3-61a9c4f9d771" xlink:to="loc_viv_PriceOfCopperTonUSMember_019c4985-1f26-7b47-8c93-17d45cc248d0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SensitivityAnalysisAssumptionsRiskVariableRatio_019c4274-2dad-7aed-bd41-4cb20449757d" xlink:href="viv-20251231.xsd#viv_SensitivityAnalysisAssumptionsRiskVariableRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_019c4274-2dad-79b7-949f-1996bcad3d54" xlink:to="loc_viv_SensitivityAnalysisAssumptionsRiskVariableRatio_019c4274-2dad-7aed-bd41-4cb20449757d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SensitivityAnalysisAssumptionsRiskVariablePercentage_019c4274-2dad-7baa-8b9b-62d4c1d31c77" xlink:href="viv-20251231.xsd#viv_SensitivityAnalysisAssumptionsRiskVariablePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_019c4274-2dad-79b7-949f-1996bcad3d54" xlink:to="loc_viv_SensitivityAnalysisAssumptionsRiskVariablePercentage_019c4274-2dad-7baa-8b9b-62d4c1d31c77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SensitivityAnalysisAssumptionsRiskVariablePrice_019c4986-57a8-73e5-91c9-3ee53593bbf2" xlink:href="viv-20251231.xsd#viv_SensitivityAnalysisAssumptionsRiskVariablePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsLineItems_019c4274-2dad-79b7-949f-1996bcad3d54" xlink:to="loc_viv_SensitivityAnalysisAssumptionsRiskVariablePrice_019c4986-57a8-73e5-91c9-3ee53593bbf2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails6" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails6"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails6" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2e74-78be-921e-669f109d09cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2e74-78be-921e-669f109d09cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-78be-921e-669f109d09cf_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2e74-78be-921e-669f109d09cf" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-78be-921e-669f109d09cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_019c4274-2e74-78be-921e-669f109d09cf" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashAndCashEquivalentsNote3.Member_019c4274-2e74-7b65-b423-5e74ea3e3134" xlink:href="viv-20251231.xsd#viv_CashAndCashEquivalentsNote3.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_viv_CashAndCashEquivalentsNote3.Member_019c4274-2e74-7b65-b423-5e74ea3e3134" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialInvestmentsMember_019c4274-2e74-7aba-822b-37e0e6b565ca" xlink:href="viv-20251231.xsd#viv_FinancialInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_viv_FinancialInvestmentsMember_019c4274-2e74-7aba-822b-37e0e6b565ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_019c4274-2e74-7ab7-8b59-573b0d53d652" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_ifrs-full_TradeReceivablesMember_019c4274-2e74-7ab7-8b59-573b0d53d652" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_019c4274-2e74-7ed3-b351-95fc87653131" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_ifrs-full_DerivativesMember_019c4274-2e74-7ed3-b351-95fc87653131" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_SaleOfRealEstateAndOtherReceivablesMember_019c4274-2e74-79a0-83a0-991dc0a0bce3" xlink:href="viv-20251231.xsd#viv_SaleOfRealEstateAndOtherReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_viv_SaleOfRealEstateAndOtherReceivablesMember_019c4274-2e74-79a0-83a0-991dc0a0bce3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RelatedPartyReceivablesNote11Member_019c4274-2e74-7426-ae25-edabe578e771" xlink:href="viv-20251231.xsd#viv_RelatedPartyReceivablesNote11Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsDomain_019c4274-2e74-73d5-bca1-03fbf9ce3d9b" xlink:to="loc_viv_RelatedPartyReceivablesNote11Member_019c4274-2e74-7426-ae25-edabe578e771" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c4274-2e74-72a3-ab9f-e59887ebb8bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c4274-2e74-72a3-ab9f-e59887ebb8bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-72a3-ab9f-e59887ebb8bd_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c4274-2e74-72a3-ab9f-e59887ebb8bd" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-72a3-ab9f-e59887ebb8bd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialAssetsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_019c4274-2e74-72a3-ab9f-e59887ebb8bd" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_019c4274-2e74-70bf-80d5-a465f7535dfc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:to="loc_ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember_019c4274-2e74-70bf-80d5-a465f7535dfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember_019c4274-2e74-7658-9e34-6cb6b7226b75" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:to="loc_ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember_019c4274-2e74-7658-9e34-6cb6b7226b75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c4274-2e74-7d61-9188-d9fa56eca5f9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c4274-2e74-7d61-9188-d9fa56eca5f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c4274-2e74-7027-b7d8-b166484dfb0b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsDomain_019c4274-2e74-7301-b097-2b65aa6ca5ea" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c4274-2e74-7027-b7d8-b166484dfb0b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c4274-2dad-7c6e-893c-de8aee031f06" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c4274-2dad-7c6e-893c-de8aee031f06" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-7c6e-893c-de8aee031f06_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c4274-2dad-7c6e-893c-de8aee031f06" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-7c6e-893c-de8aee031f06_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_019c4274-2dad-7c6e-893c-de8aee031f06" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TradePayablesMember_019c4274-2dad-742e-9bdd-ad2ec3565899" xlink:href="viv-20251231.xsd#viv_TradePayablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_TradePayablesMember_019c4274-2dad-742e-9bdd-ad2ec3565899" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingBorrowingsMember_019c4274-2dad-7919-809d-57d626c440b1" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LoansAndFinancingBorrowingsMember_019c4274-2dad-7919-809d-57d626c440b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingMember_019c4274-2dad-79c8-8692-18a48215aecc" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LoansAndFinancingMember_019c4274-2dad-79c8-8692-18a48215aecc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LeasesMember_019c4274-2dad-7012-9775-f4b0571a2852" xlink:href="viv-20251231.xsd#viv_LeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LeasesMember_019c4274-2dad-7012-9775-f4b0571a2852" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebentureBorrowingsMember_019c4274-2dad-7625-8e0f-62f2f4475aaa" xlink:href="viv-20251231.xsd#viv_DebentureBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_DebentureBorrowingsMember_019c4274-2dad-7625-8e0f-62f2f4475aaa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LicencesMember_019c4274-2dad-7f45-8826-2b296204b366" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_ifrs-full_LicencesMember_019c4274-2dad-7f45-8826-2b296204b366" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_019c4274-2dad-7136-8eaf-3ec4c32a49a1" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_ifrs-full_DerivativesMember_019c4274-2dad-7136-8eaf-3ec4c32a49a1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesForAcquisitionOfCompanyMember_019c4274-2dad-7f68-b327-94823b04c8b6" xlink:href="viv-20251231.xsd#viv_LiabilitiesForAcquisitionOfCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LiabilitiesForAcquisitionOfCompanyMember_019c4274-2dad-7f68-b327-94823b04c8b6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesWithAnatelMember_019c4274-2dad-7a4e-a60c-dfb9510531b5" xlink:href="viv-20251231.xsd#viv_LiabilitiesWithAnatelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LiabilitiesWithAnatelMember_019c4274-2dad-7a4e-a60c-dfb9510531b5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReductionOfCapitalOfTheCompanyMember_019c4274-2e74-76a7-af38-01622e014728" xlink:href="viv-20251231.xsd#viv_ReductionOfCapitalOfTheCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_ReductionOfCapitalOfTheCompanyMember_019c4274-2e74-76a7-af38-01622e014728" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReverseStockSplitAndStockSplitMember_019c49d0-dc93-7017-ad5e-5b48c0541137" xlink:href="viv-20251231.xsd#viv_ReverseStockSplitAndStockSplitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_ReverseStockSplitAndStockSplitMember_019c49d0-dc93-7017-ad5e-5b48c0541137" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmountsToBeRefundedToCustomersMember_019c4274-2e74-774e-b6fb-fbd5c28aa94e" xlink:href="viv-20251231.xsd#viv_AmountsToBeRefundedToCustomersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_AmountsToBeRefundedToCustomersMember_019c4274-2e74-774e-b6fb-fbd5c28aa94e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesWithRelatedPartiesMember_019c4274-2e74-7866-9724-77c52f0d4d3c" xlink:href="viv-20251231.xsd#viv_LiabilitiesWithRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_LiabilitiesWithRelatedPartiesMember_019c4274-2e74-7866-9724-77c52f0d4d3c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_OtherCreditorsMember_019c4274-2e74-7cb9-a2ac-bd0feb146d16" xlink:href="viv-20251231.xsd#viv_OtherCreditorsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_OtherCreditorsMember_019c4274-2e74-7cb9-a2ac-bd0feb146d16" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxAmnestyAndRefinancingProgramMember_019c4274-2e74-74c6-9860-24ce2cd03068" xlink:href="viv-20251231.xsd#viv_TaxAmnestyAndRefinancingProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesDomain_019c4274-2dad-70f5-a8e2-a2555ce63e2a" xlink:to="loc_viv_TaxAmnestyAndRefinancingProgramMember_019c4274-2e74-74c6-9860-24ce2cd03068" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c4274-2e74-7f41-a6a0-4394954bdb1a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c4274-2e74-7f41-a6a0-4394954bdb1a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7f41-a6a0-4394954bdb1a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c4274-2e74-7f41-a6a0-4394954bdb1a" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7f41-a6a0-4394954bdb1a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7d16-a6ed-f2cc99eea82b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CategoriesOfFinancialLiabilitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesAxis_019c4274-2e74-7f41-a6a0-4394954bdb1a" xlink:to="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7d16-a6ed-f2cc99eea82b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c4274-2e74-765f-8085-c8a52a674f3a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7d16-a6ed-f2cc99eea82b" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember_019c4274-2e74-765f-8085-c8a52a674f3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c4274-2e74-762c-8301-804e4c7dc200" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7d16-a6ed-f2cc99eea82b" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember_019c4274-2e74-762c-8301-804e4c7dc200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_019c4274-2e74-7ba4-8ae0-648b889cd9f4" xlink:href="viv-20251231.xsd#viv_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CategoriesOfFinancialLiabilitiesDomain_019c4274-2e74-7d16-a6ed-f2cc99eea82b" xlink:to="loc_viv_FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeCategoryMember_019c4274-2e74-7ba4-8ae0-648b889cd9f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LevelsOfFairValueHierarchyAxis_019c4274-2e74-7b3a-bdf0-00590644712b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_LevelsOfFairValueHierarchyAxis_019c4274-2e74-7b3a-bdf0-00590644712b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LevelsOfFairValueHierarchyDomain_019c4274-2e74-7b3a-bdf0-00590644712b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_LevelsOfFairValueHierarchyAxis_019c4274-2e74-7b3a-bdf0-00590644712b" xlink:to="loc_ifrs-full_LevelsOfFairValueHierarchyDomain_019c4274-2e74-7b3a-bdf0-00590644712b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LevelsOfFairValueHierarchyDomain_019c4274-2e74-7b08-8004-b35337e3c59b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LevelsOfFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_LevelsOfFairValueHierarchyAxis_019c4274-2e74-7b3a-bdf0-00590644712b" xlink:to="loc_ifrs-full_LevelsOfFairValueHierarchyDomain_019c4274-2e74-7b08-8004-b35337e3c59b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Level2OfFairValueHierarchyMember_019c4274-2e74-7774-b1ca-f4cf886e0672" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Level2OfFairValueHierarchyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LevelsOfFairValueHierarchyDomain_019c4274-2e74-7b08-8004-b35337e3c59b" xlink:to="loc_ifrs-full_Level2OfFairValueHierarchyMember_019c4274-2e74-7774-b1ca-f4cf886e0672" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2dad-7780-ab80-235dc62c1c7d" xlink:to="loc_ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConsolidatedMember_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConsolidatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b" xlink:to="loc_ifrs-full_ConsolidatedMember_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConsolidatedMember_019c4274-2e74-7b83-8154-583be804d362" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ConsolidatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ConsolidatedAndSeparateFinancialStatementsAxis_019c4274-2e74-7ea3-97c7-dd4d2d7d4c5b" xlink:to="loc_ifrs-full_ConsolidatedMember_019c4274-2e74-7b83-8154-583be804d362" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SeparateMember_019c4274-2e74-77d0-811a-beac60f8f5d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SeparateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ConsolidatedMember_019c4274-2e74-7b83-8154-583be804d362" xlink:to="loc_ifrs-full_SeparateMember_019c4274-2e74-77d0-811a-beac60f8f5d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentFinancialAssets_019c4274-2e74-7ac3-9043-b6e5733339ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_CurrentFinancialAssets_019c4274-2e74-7ac3-9043-b6e5733339ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentFinancialAssets_019c4274-2e74-783b-b2c3-7c4bcec7d34a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_NoncurrentFinancialAssets_019c4274-2e74-783b-b2c3-7c4bcec7d34a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssets_019c4274-2e74-72e6-9b98-c65a1bd678d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_FinancialAssets_019c4274-2e74-72e6-9b98-c65a1bd678d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentFinancialAssetsAtFairValue_019c4274-2e74-7bf4-930d-396271eb6742" xlink:href="viv-20251231.xsd#viv_CurrentFinancialAssetsAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_viv_CurrentFinancialAssetsAtFairValue_019c4274-2e74-7bf4-930d-396271eb6742" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentFinancialAssetsAtFairValue_019c4274-2e74-7436-a83d-fc1f5d745553" xlink:href="viv-20251231.xsd#viv_NonCurrentFinancialAssetsAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_viv_NonCurrentFinancialAssetsAtFairValue_019c4274-2e74-7436-a83d-fc1f5d745553" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtFairValue_019c4274-2e74-7d38-99bf-0519627ea0cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialAssetsAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_FinancialAssetsAtFairValue_019c4274-2e74-7d38-99bf-0519627ea0cf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentFinancialLiabilities_019c4274-2e74-7da2-b2ed-a80f05130c31" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CurrentFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_CurrentFinancialLiabilities_019c4274-2e74-7da2-b2ed-a80f05130c31" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentFinancialLiabilities_019c4274-2e74-71b8-b66a-1a595b28bec4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NoncurrentFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_NoncurrentFinancialLiabilities_019c4274-2e74-71b8-b66a-1a595b28bec4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilities_019c4274-2e74-70f3-a392-7ff4e2498de3" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_FinancialLiabilities_019c4274-2e74-70f3-a392-7ff4e2498de3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CurrentFinancialLiabilitiesAtFairValue_019c4274-2e74-77b5-99a3-2bc80d12e927" xlink:href="viv-20251231.xsd#viv_CurrentFinancialLiabilitiesAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_viv_CurrentFinancialLiabilitiesAtFairValue_019c4274-2e74-77b5-99a3-2bc80d12e927" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NonCurrentFinancialLiabilitiesAtFairValue_019c4274-2e74-7742-a545-0c608c3f46cf" xlink:href="viv-20251231.xsd#viv_NonCurrentFinancialLiabilitiesAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_viv_NonCurrentFinancialLiabilitiesAtFairValue_019c4274-2e74-7742-a545-0c608c3f46cf" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesAtFairValue_019c4274-2e74-7bee-bf41-5a9a467bef8f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_FinancialLiabilitiesAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-7fcc-9d4a-221b21ca9c6d" xlink:to="loc_ifrs-full_FinancialLiabilitiesAtFairValue_019c4274-2e74-7bee-bf41-5a9a467bef8f" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails7" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails7"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTDetails7" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2e74-703c-8a0b-b04c2058d8bc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2e74-703c-8a0b-b04c2058d8bc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_019c4274-2e74-7eee-b7ad-e866469e6417" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4274-2e74-703c-8a0b-b04c2058d8bc" xlink:to="loc_ifrs-full_TypesOfRisksAxis_019c4274-2e74-7eee-b7ad-e866469e6417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c4274-2e74-7eee-b7ad-e866469e6417_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c4274-2e74-7eee-b7ad-e866469e6417" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c4274-2e74-7eee-b7ad-e866469e6417_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksDomain_019c4274-2e74-7ecf-9890-869985ea4abe" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TypesOfRisksDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_019c4274-2e74-7eee-b7ad-e866469e6417" xlink:to="loc_ifrs-full_TypesOfRisksDomain_019c4274-2e74-7ecf-9890-869985ea4abe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CapitalManagementRiskMember_019c4274-2e74-70d2-b481-94afdab56b2d" xlink:href="viv-20251231.xsd#viv_CapitalManagementRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksDomain_019c4274-2e74-7ecf-9890-869985ea4abe" xlink:to="loc_viv_CapitalManagementRiskMember_019c4274-2e74-70d2-b481-94afdab56b2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalents_019c4274-2e74-75b8-8278-48ae0d1d8ecc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_CashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_ifrs-full_CashAndCashEquivalents_019c4274-2e74-75b8-8278-48ae0d1d8ecc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsFinancialInvestments_019c4274-2e74-7083-ba2d-890a8bd08907" xlink:href="viv-20251231.xsd#viv_IfrsFinancialInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_IfrsFinancialInvestments_019c4274-2e74-7083-ba2d-890a8bd08907" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AccountsReceivableFIDC_019c4274-2e74-7a96-ad19-7691f62aafb0" xlink:href="viv-20251231.xsd#viv_AccountsReceivableFIDC"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_AccountsReceivableFIDC_019c4274-2e74-7a96-ad19-7691f62aafb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialDepositForBusinessAcquisition_019c4274-2e74-79e5-a1e6-e31225ad78de" xlink:href="viv-20251231.xsd#viv_JudicialDepositForBusinessAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_JudicialDepositForBusinessAcquisition_019c4274-2e74-79e5-a1e6-e31225ad78de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Borrowings_019c4274-2e74-7b41-8cd7-031f6d2f09fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Borrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_ifrs-full_Borrowings_019c4274-2e74-7b41-8cd7-031f6d2f09fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingDebenturesLeasesAndOtherCreditorsNetOfJudicialDeposits_019c4274-2e74-75e2-8085-de6a9ca2b41b" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingDebenturesLeasesAndOtherCreditorsNetOfJudicialDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_LoansAndFinancingDebenturesLeasesAndOtherCreditorsNetOfJudicialDeposits_019c4274-2e74-75e2-8085-de6a9ca2b41b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2e74-7ae2-8bea-65fbbd44910b" xlink:href="viv-20251231.xsd#viv_DerivativeAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_DerivativeAssetsLiabilitiesNet_019c4274-2e74-7ae2-8bea-65fbbd44910b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NetDebt_019c4274-2e74-7298-985f-39d6b3e56897" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NetDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_ifrs-full_NetDebt_019c4274-2e74-7298-985f-39d6b3e56897" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_019c4274-2e74-7ec4-b5c4-c9c790bf62c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_ifrs-full_Equity_019c4274-2e74-7ec4-b5c4-c9c790bf62c9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NetDebtToEquityRatio_019c4274-2e74-7166-8526-099063fc1325" xlink:href="viv-20251231.xsd#viv_NetDebtToEquityRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4274-2e74-78cb-a302-c294471bc2ba" xlink:to="loc_viv_NetDebtToEquityRatio_019c4274-2e74-7166-8526-099063fc1325" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTAdditionalInformationDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/FINANCIALINSTRUMENTSANDRISKANDCAPITALMANAGEMENTAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4937-7ca2-7379-89d8-275fc9956c0e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_019c4937-7ca2-7379-89d8-275fc9956c0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfCollectionCycles_019c49de-eb72-79b9-b1d8-65e71a545398" xlink:href="viv-20251231.xsd#viv_NumberOfCollectionCycles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_NumberOfCollectionCycles_019c49de-eb72-79b9-b1d8-65e71a545398" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets_019c49df-4fb2-7cc2-b988-8c2e316c0ab9" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_ifrs-full_TransfersOutOfLevel1IntoLevel2OfFairValueHierarchyAssets_019c49df-4fb2-7cc2-b988-8c2e316c0ab9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WeightedAverageHedgedRate_019c4939-744b-7964-b849-0b1cc80808be" xlink:href="viv-20251231.xsd#viv_WeightedAverageHedgedRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_WeightedAverageHedgedRate_019c4939-744b-7964-b849-0b1cc80808be" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ThresholdMonthsForChangesInDerivativeAsAnEconomicHedge_019c4942-27eb-71b9-882b-8f79cbd930db" xlink:href="viv-20251231.xsd#viv_ThresholdMonthsForChangesInDerivativeAsAnEconomicHedge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_ThresholdMonthsForChangesInDerivativeAsAnEconomicHedge_019c4942-27eb-71b9-882b-8f79cbd930db" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_EmbeddedDerivativeNumberOfInstrumentsHeld_019c49df-a9ed-7963-8aaf-ec82ec4e3e40" xlink:href="viv-20251231.xsd#viv_EmbeddedDerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_EmbeddedDerivativeNumberOfInstrumentsHeld_019c49df-a9ed-7963-8aaf-ec82ec4e3e40" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ThresholdBusinessDaysForLinearConvention_019c493c-c78c-7f19-afc1-a17e93216105" xlink:href="viv-20251231.xsd#viv_ThresholdBusinessDaysForLinearConvention"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_ThresholdBusinessDaysForLinearConvention_019c493c-c78c-7f19-afc1-a17e93216105" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ThresholdBusinessDaysForExponentialConvention_019c493d-8529-7e30-9b10-c574655c18ab" xlink:href="viv-20251231.xsd#viv_ThresholdBusinessDaysForExponentialConvention"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_ThresholdBusinessDaysForExponentialConvention_019c493d-8529-7e30-9b10-c574655c18ab" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PercentageOfRiskDeteriorationForScenarioOne_019c4966-894a-7372-a354-1f40e18ee4f0" xlink:href="viv-20251231.xsd#viv_PercentageOfRiskDeteriorationForScenarioOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_PercentageOfRiskDeteriorationForScenarioOne_019c4966-894a-7372-a354-1f40e18ee4f0" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AmountPayableToCoverNetBalanceOfRightsAndObligations_019c49d9-d204-7340-b025-e4be506e8a81" xlink:href="viv-20251231.xsd#viv_AmountPayableToCoverNetBalanceOfRightsAndObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_AmountPayableToCoverNetBalanceOfRightsAndObligations_019c49d9-d204-7340-b025-e4be506e8a81" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents_019c49db-26cd-7560-82fc-9208360e8903" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_ifrs-full_ShorttermInvestmentsClassifiedAsCashEquivalents_019c49db-26cd-7560-82fc-9208360e8903" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumCoverageOfInsuranceClaimsOperationalRisks_019c49db-9c0c-7649-9c93-bb84430bfe47" xlink:href="viv-20251231.xsd#viv_MaximumCoverageOfInsuranceClaimsOperationalRisks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_MaximumCoverageOfInsuranceClaimsOperationalRisks_019c49db-9c0c-7649-9c93-bb84430bfe47" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumCoverageOfInsuranceClaimsGeneralCivilLiabilityRisks_019c49db-cf00-7618-ac79-ab8c9ed4fc71" xlink:href="viv-20251231.xsd#viv_MaximumCoverageOfInsuranceClaimsGeneralCivilLiabilityRisks"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_019c4937-c64c-7049-ba18-899c566f8931" xlink:to="loc_viv_MaximumCoverageOfInsuranceClaimsGeneralCivilLiabilityRisks_019c49db-cf00-7618-ac79-ab8c9ed4fc71" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/ADDITIONALINFORMATIONONCASHFLOWSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#ADDITIONALINFORMATIONONCASHFLOWSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/ADDITIONALINFORMATIONONCASHFLOWSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2e74-7af9-8d22-4606e40dd492" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2e74-7af9-8d22-4606e40dd492" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2e74-70c7-96b4-629ea40667bb" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_019c4274-2e74-7af9-8d22-4606e40dd492" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2e74-70c7-96b4-629ea40667bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-70c7-96b4-629ea40667bb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2e74-70c7-96b4-629ea40667bb" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-70c7-96b4-629ea40667bb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_BorrowingsByNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_019c4274-2e74-70c7-96b4-629ea40667bb" xlink:to="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterimDividendsAndInterestOnEquityMember_019c4274-2e74-7167-bf44-72928ada8d14" xlink:href="viv-20251231.xsd#viv_InterimDividendsAndInterestOnEquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_InterimDividendsAndInterestOnEquityMember_019c4274-2e74-7167-bf44-72928ada8d14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2e74-7f04-9899-f22af73d9d3f" xlink:href="viv-20251231.xsd#viv_LoansAndFinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_LoansAndFinancingFinancialInstitutionsMember_019c4274-2e74-7f04-9899-f22af73d9d3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2e74-775e-ba82-99d9d8fe9f38" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_019c4274-2e74-775e-ba82-99d9d8fe9f38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DebentureBorrowingsMember_019c4274-2e74-7b8d-ad90-e0dc47370f8e" xlink:href="viv-20251231.xsd#viv_DebentureBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_DebentureBorrowingsMember_019c4274-2e74-7b8d-ad90-e0dc47370f8e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReverseStockSplitAndStockSplitMember_019c44b3-95f0-706c-a9f1-297c6b8c854c" xlink:href="viv-20251231.xsd#viv_ReverseStockSplitAndStockSplitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_ReverseStockSplitAndStockSplitMember_019c44b3-95f0-706c-a9f1-297c6b8c854c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LiabilitiesForAcquisitionOfCompanyMember_019c4274-2e74-7cf0-a3ff-df4eef2d14d0" xlink:href="viv-20251231.xsd#viv_LiabilitiesForAcquisitionOfCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_LiabilitiesForAcquisitionOfCompanyMember_019c4274-2e74-7cf0-a3ff-df4eef2d14d0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LicencesMember_019c4274-2e74-7479-a3a0-ce071ce40865" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LicencesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_ifrs-full_LicencesMember_019c4274-2e74-7479-a3a0-ce071ce40865" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReductionOfTheCompanysCapitalMember_019c44b4-8320-709e-b328-b29172d6f82d" xlink:href="viv-20251231.xsd#viv_ReductionOfTheCompanysCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_ReductionOfTheCompanysCapitalMember_019c44b4-8320-709e-b328-b29172d6f82d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c4274-2e74-7020-8a4d-b91a8e2a31a2" xlink:href="viv-20251231.xsd#viv_TaxRefinancingAndAmnestyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_TaxRefinancingAndAmnestyProgramMember_019c4274-2e74-7020-8a4d-b91a8e2a31a2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingFinancialInstitutionsMember_019c4274-2e74-7716-a5bf-d567f49512ea" xlink:href="viv-20251231.xsd#viv_FinancingFinancialInstitutionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_viv_FinancingFinancialInstitutionsMember_019c4274-2e74-7716-a5bf-d567f49512ea" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_019c4274-2e74-7a10-8f7d-368728fdb631" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameDomain_019c4274-2e74-745d-acf7-92a6baab23f7" xlink:to="loc_ifrs-full_DerivativesMember_019c4274-2e74-7a10-8f7d-368728fdb631" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReconciliationOfCashFlowFinancingActivities_019c4274-2e74-79f1-a6e6-62527b2197f4" xlink:href="viv-20251231.xsd#viv_ReconciliationOfCashFlowFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_ReconciliationOfCashFlowFinancingActivities_019c4274-2e74-79f1-a6e6-62527b2197f4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashFlowsFromFinancingActivitiesAdditions_019c4274-2e74-753d-9ed7-6a2dccd9a955" xlink:href="viv-20251231.xsd#viv_CashFlowsFromFinancingActivitiesAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_CashFlowsFromFinancingActivitiesAdditions_019c4274-2e74-753d-9ed7-6a2dccd9a955" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashFlowsFromFinancingActivitiesWriteOffsPayments_019c4274-2e74-7052-8849-4e0da41ef2d8" xlink:href="viv-20251231.xsd#viv_CashFlowsFromFinancingActivitiesWriteOffsPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_CashFlowsFromFinancingActivitiesWriteOffsPayments_019c4274-2e74-7052-8849-4e0da41ef2d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashFlowsFromOperatingActivitiesWriteOffsPayments_019c4274-2e74-7a2a-ac54-347bafac6eea" xlink:href="viv-20251231.xsd#viv_CashFlowsFromOperatingActivitiesWriteOffsPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_CashFlowsFromOperatingActivitiesWriteOffsPayments_019c4274-2e74-7a2a-ac54-347bafac6eea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsFinancialChargesFairValueMonetaryAndExchangeRateUpdates_019c4274-2e74-7fd3-b529-e5a5d4ce84f7" xlink:href="viv-20251231.xsd#viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsFinancialChargesFairValueMonetaryAndExchangeRateUpdates"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsFinancialChargesFairValueMonetaryAndExchangeRateUpdates_019c4274-2e74-7fd3-b529-e5a5d4ce84f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsAdditionsOfFinancialLeaseAndSupplierFinancing_019c4274-2e74-71af-9f93-7d50a0b4fc9d" xlink:href="viv-20251231.xsd#viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsAdditionsOfFinancialLeaseAndSupplierFinancing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsAdditionsOfFinancialLeaseAndSupplierFinancing_019c4274-2e74-71af-9f93-7d50a0b4fc9d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsBusinessCombination_019c4274-2e74-7170-88c6-1ae36dc4725b" xlink:href="viv-20251231.xsd#viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsBusinessCombination_019c4274-2e74-7170-88c6-1ae36dc4725b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsInterimAndUnclaimedDividendsAndInterestOnEquity_019c4274-2e74-73f0-bc81-db91c8effe26" xlink:href="viv-20251231.xsd#viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsInterimAndUnclaimedDividendsAndInterestOnEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_FinancingActivitiesNotInvolvingCashAndCashEquivalentsInterimAndUnclaimedDividendsAndInterestOnEquity_019c4274-2e74-73f0-bc81-db91c8effe26" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ReconciliationOfCashFlowFinancingActivities_019c4274-2e74-751d-954b-dd01b71353c9" xlink:href="viv-20251231.xsd#viv_ReconciliationOfCashFlowFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CashFlowsFromOperatingActivitiesAdditions_019c4274-2e74-7c06-937b-8e8e85e2d045" xlink:href="viv-20251231.xsd#viv_CashFlowsFromOperatingActivitiesAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_019c4274-2e74-73a8-b11f-b42e4393808f" xlink:to="loc_viv_CashFlowsFromOperatingActivitiesAdditions_019c4274-2e74-7c06-937b-8e8e85e2d045" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/CONTRACTUALCOMMITMENTSANDGUARANTEESContractualcommitmentsDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#CONTRACTUALCOMMITMENTSANDGUARANTEESContractualcommitmentsDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/CONTRACTUALCOMMITMENTSANDGUARANTEESContractualcommitmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentLineItems_019c4274-2e74-7a86-a177-d5b0e82045c6" xlink:href="viv-20251231.xsd#viv_DisclosureOfMaturityAnalysisForContractualCommitmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentTable_019c4274-2e74-7a78-ad23-5563dc275b16" xlink:href="viv-20251231.xsd#viv_DisclosureOfMaturityAnalysisForContractualCommitmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentLineItems_019c4274-2e74-7a86-a177-d5b0e82045c6" xlink:to="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentTable_019c4274-2e74-7a78-ad23-5563dc275b16" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2e74-733d-9894-65547a69f721" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentTable_019c4274-2e74-7a78-ad23-5563dc275b16" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2e74-733d-9894-65547a69f721" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2e74-733d-9894-65547a69f721_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2e74-733d-9894-65547a69f721" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2e74-733d-9894-65547a69f721_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2e74-733d-9894-65547a69f721" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2e74-7149-bf26-e503bf8865ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_019c4274-2e74-7149-bf26-e503bf8865ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2e74-71d4-834e-2eb68ab6d251" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_019c4274-2e74-71d4-834e-2eb68ab6d251" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2e74-7698-b282-826b907daad5" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_019c4274-2e74-7698-b282-826b907daad5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2e74-7539-b93b-9035935b90da" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_019c4274-2e74-7539-b93b-9035935b90da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2e74-7fce-aaa3-97037dfcb9c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_019c4274-2e74-7fce-aaa3-97037dfcb9c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2e74-7ab3-bcae-0ecca190f67c" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7152-aecd-12311aa4712d" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_019c4274-2e74-7ab3-bcae-0ecca190f67c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ContractualCommitmentsForPurchaseOfGoodsAndServices_019c4274-2e74-7f54-bb37-6ce6b6c7c282" xlink:href="viv-20251231.xsd#viv_ContractualCommitmentsForPurchaseOfGoodsAndServices"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentLineItems_019c4274-2e74-7a86-a177-d5b0e82045c6" xlink:to="loc_viv_ContractualCommitmentsForPurchaseOfGoodsAndServices_019c4274-2e74-7f54-bb37-6ce6b6c7c282" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ProvisionOfSecurityServicesWithTelefonicaCybersecurityTechS.L.U._019c4274-2e74-7bf0-99d0-98d8df4401b2" xlink:href="viv-20251231.xsd#viv_ProvisionOfSecurityServicesWithTelefonicaCybersecurityTechS.L.U."/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_DisclosureOfMaturityAnalysisForContractualCommitmentLineItems_019c4274-2e74-7a86-a177-d5b0e82045c6" xlink:to="loc_viv_ProvisionOfSecurityServicesWithTelefonicaCybersecurityTechS.L.U._019c4274-2e74-7bf0-99d0-98d8df4401b2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/CONTRACTUALCOMMITMENTSANDGUARANTEESGuaranteesDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#CONTRACTUALCOMMITMENTSANDGUARANTEESGuaranteesDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/CONTRACTUALCOMMITMENTSANDGUARANTEESGuaranteesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGuaranteeObligationsLineItems_019c4274-2e74-73a8-bda0-6a84626b74e6" xlink:href="viv-20251231.xsd#viv_IfrsGuaranteeObligationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsScheduleOfGuaranteeObligationsTable_019c4274-2e74-7a71-9b20-9c7703a6bb51" xlink:href="viv-20251231.xsd#viv_IfrsScheduleOfGuaranteeObligationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_viv_IfrsGuaranteeObligationsLineItems_019c4274-2e74-73a8-bda0-6a84626b74e6" xlink:to="loc_viv_IfrsScheduleOfGuaranteeObligationsTable_019c4274-2e74-7a71-9b20-9c7703a6bb51" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGuaranteeObligationsByNatureAxis_019c4274-2e74-7934-9305-7d1c0ca4d7e5" xlink:href="viv-20251231.xsd#viv_IfrsGuaranteeObligationsByNatureAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_viv_IfrsScheduleOfGuaranteeObligationsTable_019c4274-2e74-7a71-9b20-9c7703a6bb51" xlink:to="loc_viv_IfrsGuaranteeObligationsByNatureAxis_019c4274-2e74-7934-9305-7d1c0ca4d7e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7934-9305-7d1c0ca4d7e5_default" xlink:href="viv-20251231.xsd#viv_IfrsGuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_viv_IfrsGuaranteeObligationsByNatureAxis_019c4274-2e74-7934-9305-7d1c0ca4d7e5" xlink:to="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7934-9305-7d1c0ca4d7e5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:href="viv-20251231.xsd#viv_IfrsGuaranteeObligationsNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_viv_IfrsGuaranteeObligationsByNatureAxis_019c4274-2e74-7934-9305-7d1c0ca4d7e5" xlink:to="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InsuranceGuaranteeForLegalProceedingsMember_019c4274-2e74-73b7-a9d3-40983f1bba93" xlink:href="viv-20251231.xsd#viv_InsuranceGuaranteeForLegalProceedingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:to="loc_viv_InsuranceGuaranteeForLegalProceedingsMember_019c4274-2e74-73b7-a9d3-40983f1bba93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_LettersOfGuaranteeLegalProceedingsMember_019c4274-2e74-7d7a-8327-e564fe9655c2" xlink:href="viv-20251231.xsd#viv_LettersOfGuaranteeLegalProceedingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:to="loc_viv_LettersOfGuaranteeLegalProceedingsMember_019c4274-2e74-7d7a-8327-e564fe9655c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_JudicialDepositsAndGarnishmentsMember_019c4274-2e74-70b1-b807-21a647df380d" xlink:href="viv-20251231.xsd#viv_JudicialDepositsAndGarnishmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:to="loc_viv_JudicialDepositsAndGarnishmentsMember_019c4274-2e74-70b1-b807-21a647df380d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PropertyAndEquipmentNote13fMember_019c4274-2e74-7450-81d3-3f8d197bb150" xlink:href="viv-20251231.xsd#viv_PropertyAndEquipmentNote13fMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:to="loc_viv_PropertyAndEquipmentNote13fMember_019c4274-2e74-7450-81d3-3f8d197bb150" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FinancialInvestmentsInGuaranteeOfLawsuitsMember_019c4274-2e74-7bfd-bffe-37c6481fa772" xlink:href="viv-20251231.xsd#viv_FinancialInvestmentsInGuaranteeOfLawsuitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsNatureDomain_019c4274-2e74-7342-b30d-aa83d2e33f6e" xlink:to="loc_viv_FinancialInvestmentsInGuaranteeOfLawsuitsMember_019c4274-2e74-7bfd-bffe-37c6481fa772" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_IfrsGuaranteeObligationsCarryingValue_019c4274-2e74-7b7c-8810-97629e5038fe" xlink:href="viv-20251231.xsd#viv_IfrsGuaranteeObligationsCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsLineItems_019c4274-2e74-73a8-bda0-6a84626b74e6" xlink:to="loc_viv_IfrsGuaranteeObligationsCarryingValue_019c4274-2e74-7b7c-8810-97629e5038fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_019c4274-2e74-7aad-b124-2e0c01a4e966" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_viv_IfrsGuaranteeObligationsLineItems_019c4274-2e74-73a8-bda0-6a84626b74e6" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentPledgedAsSecurity_019c4274-2e74-7aad-b124-2e0c01a4e966" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telefonica.com.br/role/SUBSEQUENTEVENTSDetails" xlink:type="simple" xlink:href="viv-20251231.xsd#SUBSEQUENTEVENTSDetails"/>
  <link:definitionLink xlink:role="http://www.telefonica.com.br/role/SUBSEQUENTEVENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c4274-2e74-73e0-9599-fe5553c7498e" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c4274-2e74-73e0-9599-fe5553c7498e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-73e0-9599-fe5553c7498e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c4274-2e74-73e0-9599-fe5553c7498e" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-73e0-9599-fe5553c7498e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-76f1-88e9-6fbea0207896" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_019c4274-2e74-73e0-9599-fe5553c7498e" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-76f1-88e9-6fbea0207896" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InvestmentInKlubiParticipaesS.a.Member_019c4274-2e74-7ac9-b106-ff348d17f726" xlink:href="viv-20251231.xsd#viv_InvestmentInKlubiParticipaesS.a.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-76f1-88e9-6fbea0207896" xlink:to="loc_viv_InvestmentInKlubiParticipaesS.a.Member_019c4274-2e74-7ac9-b106-ff348d17f726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CreditOfInterestOnEquityIntermediariesMember_019c4274-2e74-7256-9084-706f19c886f5" xlink:href="viv-20251231.xsd#viv_CreditOfInterestOnEquityIntermediariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-76f1-88e9-6fbea0207896" xlink:to="loc_viv_CreditOfInterestOnEquityIntermediariesMember_019c4274-2e74-7256-9084-706f19c886f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareRepurchaseProgramMember_019c4274-2e74-7a96-a907-52313119455c" xlink:href="viv-20251231.xsd#viv_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodDomain_019c4274-2e74-76f1-88e9-6fbea0207896" xlink:to="loc_viv_ShareRepurchaseProgramMember_019c4274-2e74-7a96-a907-52313119455c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2e74-72bd-9f52-433702d865f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2e74-72bd-9f52-433702d865f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2e74-72bd-9f52-433702d865f2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2e74-72bd-9f52-433702d865f2" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2e74-72bd-9f52-433702d865f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2e74-7685-9ad2-b351284b92e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ClassesOfShareCapitalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_019c4274-2e74-72bd-9f52-433702d865f2" xlink:to="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2e74-7685-9ad2-b351284b92e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_019c4274-2e74-7f93-8a20-a9d9e0393f9f" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalDomain_019c4274-2e74-7685-9ad2-b351284b92e7" xlink:to="loc_ifrs-full_OrdinarySharesMember_019c4274-2e74-7f93-8a20-a9d9e0393f9f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2e74-7bd8-964d-423c384484a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2e74-7bd8-964d-423c384484a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2e74-7bd8-964d-423c384484a0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2e74-7bd8-964d-423c384484a0" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2e74-7bd8-964d-423c384484a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2e74-7963-87a8-f7ab9c29839a" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_ComponentsOfEquityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_019c4274-2e74-7bd8-964d-423c384484a0" xlink:to="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2e74-7963-87a8-f7ab9c29839a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember_019c4274-2e74-7efd-9d4b-56418b480178" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_TreasurySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfEquityDomain_019c4274-2e74-7963-87a8-f7ab9c29839a" xlink:to="loc_ifrs-full_TreasurySharesMember_019c4274-2e74-7efd-9d4b-56418b480178" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_019c4274-2e74-7103-b226-48dc0a8862bf" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:to="loc_ifrs-full_MaturityAxis_019c4274-2e74-7103-b226-48dc0a8862bf" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2e74-7103-b226-48dc0a8862bf_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2e74-7103-b226-48dc0a8862bf" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2e74-7103-b226-48dc0a8862bf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityDomain_019c4274-2e74-7441-823b-9bf4d75817e0" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_MaturityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_019c4274-2e74-7103-b226-48dc0a8862bf" xlink:to="loc_ifrs-full_MaturityDomain_019c4274-2e74-7441-823b-9bf4d75817e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneMonthMember_019c4274-2e74-7676-bad9-970e8bf661cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_NotLaterThanOneMonthMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_MaturityDomain_019c4274-2e74-7441-823b-9bf4d75817e0" xlink:to="loc_ifrs-full_NotLaterThanOneMonthMember_019c4274-2e74-7676-bad9-970e8bf661cc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c57e2-aae9-7f5a-bdaa-97c31785de3b" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodTable_019c4274-2e74-7f9b-8d41-46fd55202843" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c57e2-aae9-7f5a-bdaa-97c31785de3b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-7f5a-bdaa-97c31785de3b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c57e2-aae9-7f5a-bdaa-97c31785de3b" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-7f5a-bdaa-97c31785de3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-736c-b8d2-fda99916d6ab" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_SignificantInvestmentsInSubsidiariesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesAxis_019c57e2-aae9-7f5a-bdaa-97c31785de3b" xlink:to="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-736c-b8d2-fda99916d6ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_CDPQMember_019c57e2-aae9-7f41-8516-72f3973a29d9" xlink:href="viv-20251231.xsd#viv_CDPQMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-736c-b8d2-fda99916d6ab" xlink:to="loc_viv_CDPQMember_019c57e2-aae9-7f41-8516-72f3973a29d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_FibreBrasilMember_019c57e2-aae9-7c6d-afc0-ad22256130cf" xlink:href="viv-20251231.xsd#viv_FibreBrasilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SignificantInvestmentsInSubsidiariesDomain_019c57e2-aae9-736c-b8d2-fda99916d6ab" xlink:to="loc_viv_FibreBrasilMember_019c57e2-aae9-7c6d-afc0-ad22256130cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityGrossValue_019c4274-2e74-7bc4-8522-e7644952fe98" xlink:href="viv-20251231.xsd#viv_InterestOnEquityGrossValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_InterestOnEquityGrossValue_019c4274-2e74-7bc4-8522-e7644952fe98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityGrossValuePerShare_019c4274-2e74-718b-92bd-9bb8c29a4427" xlink:href="viv-20251231.xsd#viv_InterestOnEquityGrossValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_InterestOnEquityGrossValuePerShare_019c4274-2e74-718b-92bd-9bb8c29a4427" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityNetValueAfterWithholdingIncomeTax_019c4274-2e74-7ac0-a6cc-e53c829820a5" xlink:href="viv-20251231.xsd#viv_InterestOnEquityNetValueAfterWithholdingIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_InterestOnEquityNetValueAfterWithholdingIncomeTax_019c4274-2e74-7ac0-a6cc-e53c829820a5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_InterestOnEquityNetValuePerShareAfterWithholdingIncomeTax_019c4274-2e74-7d85-ada2-b4d2ce2dd6c4" xlink:href="viv-20251231.xsd#viv_InterestOnEquityNetValuePerShareAfterWithholdingIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_InterestOnEquityNetValuePerShareAfterWithholdingIncomeTax_019c4274-2e74-7d85-ada2-b4d2ce2dd6c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_NumberOfSharesCancelled_019c4274-2e74-72f8-9740-d013fe216d11" xlink:href="viv-20251231.xsd#viv_NumberOfSharesCancelled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_NumberOfSharesCancelled_019c4274-2e74-72f8-9740-d013fe216d11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_019c4274-2e74-707c-837e-93794ac67ef4" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_ifrs-full_PortionOfGainsLossesRecognisedWhenControlOfSubsidiaryIsLostAttributableToRecognisingInvestmentRetainedInFormerSubsidiary_019c4274-2e74-707c-837e-93794ac67ef4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_PeriodOfWhichInvestmentStarted_019c4274-2e74-7287-8c4e-e0e2a22b16be" xlink:href="viv-20251231.xsd#viv_PeriodOfWhichInvestmentStarted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_PeriodOfWhichInvestmentStarted_019c4274-2e74-7287-8c4e-e0e2a22b16be" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumNumberOfCommonShareToBeRepurchase_019c4274-2e74-763a-971f-b048a59c6432" xlink:href="viv-20251231.xsd#viv_MaximumNumberOfCommonShareToBeRepurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_MaximumNumberOfCommonShareToBeRepurchase_019c4274-2e74-763a-971f-b048a59c6432" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumValueForRepurchasedOfCommonShare_019c4274-2e74-70fd-9b8d-34811eeff653" xlink:href="viv-20251231.xsd#viv_MaximumValueForRepurchasedOfCommonShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_MaximumValueForRepurchasedOfCommonShare_019c4274-2e74-70fd-9b8d-34811eeff653" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_MaximumAmountOfReductionInCapitalStocksRequest_019c4274-2e74-776a-80ea-2faafcc30ecb" xlink:href="viv-20251231.xsd#viv_MaximumAmountOfReductionInCapitalStocksRequest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_MaximumAmountOfReductionInCapitalStocksRequest_019c4274-2e74-776a-80ea-2faafcc30ecb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_ShareCapitalReduction_019c4274-2e74-7fee-beb8-2998e8492faa" xlink:href="viv-20251231.xsd#viv_ShareCapitalReduction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_ShareCapitalReduction_019c4274-2e74-7fee-beb8-2998e8492faa" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_RefundingToShareholders_019c4274-2e74-703f-ac02-989d11a6b7af" xlink:href="viv-20251231.xsd#viv_RefundingToShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_RefundingToShareholders_019c4274-2e74-703f-ac02-989d11a6b7af" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapital_019c4274-2e74-716f-a2be-7680907585cd" xlink:href="https://xbrl.ifrs.org/taxonomy/2025-03-27/full_ifrs/full_ifrs-cor_2025-03-27.xsd#ifrs-full_IssuedCapital"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_ifrs-full_IssuedCapital_019c4274-2e74-716f-a2be-7680907585cd" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_AcquisitionOfPercentageOfSharesIssuedByFibrasil_019c57e2-aae9-7b4b-87df-dc773569afba" xlink:href="viv-20251231.xsd#viv_AcquisitionOfPercentageOfSharesIssuedByFibrasil"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_AcquisitionOfPercentageOfSharesIssuedByFibrasil_019c57e2-aae9-7b4b-87df-dc773569afba" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_viv_WithholdingTaxOnInterestOnEquity_019c57f5-4b4e-7cc3-b91d-5af01fd1fc03" xlink:href="viv-20251231.xsd#viv_WithholdingTaxOnInterestOnEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems_019c4274-2e74-711a-8a76-e3147f45b603" xlink:to="loc_viv_WithholdingTaxOnInterestOnEquity_019c57f5-4b4e-7cc3-b91d-5af01fd1fc03" xlink:type="arc" order="14"/>
  </link:definitionLink>
</link:linkbase>
