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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:9e20936b-beef-4809-9e8f-b9b65089d155,g:819c0d23-5519-4081-a22e-0773d7188d11-->
<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.telusinternational.com/role/CoverPage" xlink:type="simple" xlink:href="tixt-20231231.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_61fcb5ef-0c79-4d8f-859d-22ea7b9e78cc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentInformationTable_61fcb5ef-0c79-4d8f-859d-22ea7b9e78cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_e3f8991e-1efd-4645-8bd9-aa9c671c26be" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_61fcb5ef-0c79-4d8f-859d-22ea7b9e78cc" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_e3f8991e-1efd-4645-8bd9-aa9c671c26be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_e3f8991e-1efd-4645-8bd9-aa9c671c26be_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_e3f8991e-1efd-4645-8bd9-aa9c671c26be" xlink:to="loc_dei_AddressTypeDomain_e3f8991e-1efd-4645-8bd9-aa9c671c26be_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_b024ea79-ef2a-4f96-86a0-7a11ad695b54" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_e3f8991e-1efd-4645-8bd9-aa9c671c26be" xlink:to="loc_dei_AddressTypeDomain_b024ea79-ef2a-4f96-86a0-7a11ad695b54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_BusinessContactMember_d9ca0cc2-6a22-4ae6-b963-786efbea4110" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_BusinessContactMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_b024ea79-ef2a-4f96-86a0-7a11ad695b54" xlink:to="loc_dei_BusinessContactMember_d9ca0cc2-6a22-4ae6-b963-786efbea4110" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityListingsExchangeAxis_b8af6b38-a1ab-4965-87e7-68530c6287c3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityListingsExchangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_61fcb5ef-0c79-4d8f-859d-22ea7b9e78cc" xlink:to="loc_dei_EntityListingsExchangeAxis_b8af6b38-a1ab-4965-87e7-68530c6287c3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_b8af6b38-a1ab-4965-87e7-68530c6287c3_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_ExchangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityListingsExchangeAxis_b8af6b38-a1ab-4965-87e7-68530c6287c3" xlink:to="loc_dei_ExchangeDomain_b8af6b38-a1ab-4965-87e7-68530c6287c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ExchangeDomain_0e03844b-bb84-4c22-9ae7-d0f2fbbc8354" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_ExchangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityListingsExchangeAxis_b8af6b38-a1ab-4965-87e7-68530c6287c3" xlink:to="loc_dei_ExchangeDomain_0e03844b-bb84-4c22-9ae7-d0f2fbbc8354" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_exch_XNYS_e2a3f4ec-26cc-46e2-bc27-5998a1eecb01" xlink:href="https://xbrl.sec.gov/exch/2023/exch-2023.xsd#exch_XNYS"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_ExchangeDomain_0e03844b-bb84-4c22-9ae7-d0f2fbbc8354" xlink:to="loc_exch_XNYS_e2a3f4ec-26cc-46e2-bc27-5998a1eecb01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_exch_XTSE_9037b848-bbb2-4523-9753-1ae96801d80b" xlink:href="https://xbrl.sec.gov/exch/2023/exch-2023.xsd#exch_XTSE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_ExchangeDomain_0e03844b-bb84-4c22-9ae7-d0f2fbbc8354" xlink:to="loc_exch_XTSE_9037b848-bbb2-4523-9753-1ae96801d80b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_0122df5e-1a97-4da5-837d-67dbb4d053f5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentType_0122df5e-1a97-4da5-837d-67dbb4d053f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentRegistrationStatement_fe6e8bef-e152-4687-a024-a9be51111a2f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentRegistrationStatement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentRegistrationStatement_fe6e8bef-e152-4687-a024-a9be51111a2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_73b4f9d8-9db3-4f07-b19d-339eaf66f82a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentAnnualReport_73b4f9d8-9db3-4f07-b19d-339eaf66f82a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_da722b40-84ff-4b95-9cd5-675a0260026a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentTransitionReport_da722b40-84ff-4b95-9cd5-675a0260026a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentShellCompanyReport_a0caa611-a3f1-4384-a58f-e274ed2481a3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentShellCompanyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentShellCompanyReport_a0caa611-a3f1-4384-a58f-e274ed2481a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_a7520f1a-6196-4be4-8e16-18947bf43f2b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityFileNumber_a7520f1a-6196-4be4-8e16-18947bf43f2b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_b1a00f6b-5b5d-425e-b4dd-ed03daaee747" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityRegistrantName_b1a00f6b-5b5d-425e-b4dd-ed03daaee747" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_55c518db-7b97-4b62-a727-49ec1b5339c5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_55c518db-7b97-4b62-a727-49ec1b5339c5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_a753558c-eb1c-467c-9a0e-e37890fa1779" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressAddressLine2_a753558c-eb1c-467c-9a0e-e37890fa1779" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_c66c8e47-e451-43ff-82ed-e1a754343d6d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressAddressLine1_c66c8e47-e451-43ff-82ed-e1a754343d6d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_750a5b38-317c-4909-aeca-500241859b09" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressCityOrTown_750a5b38-317c-4909-aeca-500241859b09" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_fdbdc93b-6eb3-4492-ad0f-9e6865ce6bd6" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressStateOrProvince_fdbdc93b-6eb3-4492-ad0f-9e6865ce6bd6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_031e0895-b2b0-4559-9950-784ba7268872" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressPostalZipCode_031e0895-b2b0-4559-9950-784ba7268872" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_64588667-ad80-469a-b060-61a97a93b0e8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityAddressCountry_64588667-ad80-469a-b060-61a97a93b0e8" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_ContactPersonnelName_9f02c256-a967-4a7a-a7e8-c1457de6e6ce" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_ContactPersonnelName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_ContactPersonnelName_9f02c256-a967-4a7a-a7e8-c1457de6e6ce" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_5c3185c5-d28d-420e-bbf5-61d222929aa6" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_CityAreaCode_5c3185c5-d28d-420e-bbf5-61d222929aa6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_e51c768e-f6b9-4cdd-88f4-980b210be8a4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_LocalPhoneNumber_e51c768e-f6b9-4cdd-88f4-980b210be8a4" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_733125c2-4495-41e0-8022-a01240390227" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_Security12bTitle_733125c2-4495-41e0-8022-a01240390227" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_667699d1-e23c-43f4-b4de-6413f26677e5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_TradingSymbol_667699d1-e23c-43f4-b4de-6413f26677e5" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_c5fdf4d2-6f72-4fa6-a298-55d314dde230" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_SecurityExchangeName_c5fdf4d2-6f72-4fa6-a298-55d314dde230" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_ca907f35-fe39-4c97-bf7d-d4d427cea1b3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_ca907f35-fe39-4c97-bf7d-d4d427cea1b3" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_8cbf07ca-4b94-41ad-9d29-c6d252c0140f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityVoluntaryFilers_8cbf07ca-4b94-41ad-9d29-c6d252c0140f" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_ddfae99d-4506-4929-a515-62f2cf984d6f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityCurrentReportingStatus_ddfae99d-4506-4929-a515-62f2cf984d6f" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_259fb625-9dd9-4a02-b4ba-db3216222dd5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityInteractiveDataCurrent_259fb625-9dd9-4a02-b4ba-db3216222dd5" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_6bc6c2a6-417c-4997-9cf2-3f0bfef8e0cc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityFilerCategory_6bc6c2a6-417c-4997-9cf2-3f0bfef8e0cc" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_2ccb5fa2-a3c2-4f56-9977-67ae871b2160" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityEmergingGrowthCompany_2ccb5fa2-a3c2-4f56-9977-67ae871b2160" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_e593e6de-720e-4d3a-bc62-4eb3f69d124e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_IcfrAuditorAttestationFlag_e593e6de-720e-4d3a-bc62-4eb3f69d124e" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_1c1efff0-932f-42b9-8953-ca1b705a5128" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_1c1efff0-932f-42b9-8953-ca1b705a5128" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAccountingStandard_1acc7cf0-12cb-4b2f-836f-b91b85ab5df9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentAccountingStandard"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentAccountingStandard_1acc7cf0-12cb-4b2f-836f-b91b85ab5df9" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_a9f40002-b254-49df-ab10-6c88f47a328f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityShellCompany_a9f40002-b254-49df-ab10-6c88f47a328f" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_b080033c-26ad-4ec3-ace0-d0cf9d63fa88" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_b080033c-26ad-4ec3-ace0-d0cf9d63fa88" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_843346df-9cdd-45ac-8f9e-b49005488b4b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_EntityCentralIndexKey_843346df-9cdd-45ac-8f9e-b49005488b4b" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_226cca49-c7bb-40b2-8901-d90d5098fbe1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentPeriodEndDate_226cca49-c7bb-40b2-8901-d90d5098fbe1" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_a082d811-c414-45ff-829f-df791dbdf911" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_CurrentFiscalYearEndDate_a082d811-c414-45ff-829f-df791dbdf911" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_bfae0f67-11bb-4481-a808-7318fd209304" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentFiscalYearFocus_bfae0f67-11bb-4481-a808-7318fd209304" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_1a402d97-e8bc-46fc-b616-81f9327106f8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_DocumentFiscalPeriodFocus_1a402d97-e8bc-46fc-b616-81f9327106f8" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_69a4dd17-71a9-4e8b-bf8b-0055afb25d6a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_f57aefa6-65ac-4086-b3b7-af66835a936c" xlink:to="loc_dei_AmendmentFlag_69a4dd17-71a9-4e8b-bf8b-0055afb25d6a" xlink:type="arc" order="36"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/ConsolidatedStatementsofChangesinOwnersEquity" xlink:type="simple" xlink:href="tixt-20231231.xsd#ConsolidatedStatementsofChangesinOwnersEquity"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/ConsolidatedStatementsofChangesinOwnersEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityLineItems_a67935a6-7cdc-4861-818a-eba7bde42ac9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_StatementOfChangesInEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_StatementOfChangesInEquityTable_fd9645a4-5775-4c3e-92f1-1ba620dfc370" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_StatementOfChangesInEquityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_a67935a6-7cdc-4861-818a-eba7bde42ac9" xlink:to="loc_ifrs-full_StatementOfChangesInEquityTable_fd9645a4-5775-4c3e-92f1-1ba620dfc370" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_a23bec16-e995-467d-968c-0bb438df7ff5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_fd9645a4-5775-4c3e-92f1-1ba620dfc370" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_a23bec16-e995-467d-968c-0bb438df7ff5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_a23bec16-e995-467d-968c-0bb438df7ff5_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_a23bec16-e995-467d-968c-0bb438df7ff5" xlink:to="loc_ifrs-full_EquityMember_a23bec16-e995-467d-968c-0bb438df7ff5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_a23bec16-e995-467d-968c-0bb438df7ff5" xlink:to="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_824c546f-0702-4c0e-89cc-484d703e4785" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_824c546f-0702-4c0e-89cc-484d703e4785" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharePremiumMember_73b4e958-a07b-400f-9819-2f9512af47c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharePremiumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:to="loc_ifrs-full_SharePremiumMember_73b4e958-a07b-400f-9819-2f9512af47c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RetainedEarningsMember_86d80723-ff75-4a8b-8065-264c3c1c0b61" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:to="loc_ifrs-full_RetainedEarningsMember_86d80723-ff75-4a8b-8065-264c3c1c0b61" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_c3fe498c-7e38-4fcd-b5f9-9a90cd292806" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_f1472712-9a43-4b06-b540-23ca8ef285ca" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_c3fe498c-7e38-4fcd-b5f9-9a90cd292806" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_StatementOfChangesInEquityTable_fd9645a4-5775-4c3e-92f1-1ba620dfc370" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_904f6194-b3a3-4aec-9cae-9ec5bcfdd2a4" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonClassAToCommonClassEMember_fa6c7a01-2895-4909-af3b-d20994bcd952" xlink:href="tixt-20231231.xsd#tixt_CommonClassAToCommonClassEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_CommonClassAToCommonClassEMember_fa6c7a01-2895-4909-af3b-d20994bcd952" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonClassAToCommonClassDMember_8bb7ab92-8de0-4fcd-bff0-7d265c7f08bb" xlink:href="tixt-20231231.xsd#tixt_CommonClassAToCommonClassDMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_CommonClassAToCommonClassDMember_8bb7ab92-8de0-4fcd-bff0-7d265c7f08bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonClassCToCommonClassEMember_ae11a887-d27e-4713-bd31-b5737b03cf76" xlink:href="tixt-20231231.xsd#tixt_CommonClassCToCommonClassEMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_CommonClassCToCommonClassEMember_ae11a887-d27e-4713-bd31-b5737b03cf76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesToSubordinateVotingSharesMember_35cb2190-2658-4ca9-8be9-81873ec51420" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesToSubordinateVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_MultipleVotingSharesToSubordinateVotingSharesMember_35cb2190-2658-4ca9-8be9-81873ec51420" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_SubordinateVotingSharesConvertedFromMultipleVotingSharesMember_a64bf0e9-05ad-477f-bc27-411ce8535f2e" xlink:href="tixt-20231231.xsd#tixt_SubordinateVotingSharesConvertedFromMultipleVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_SubordinateVotingSharesConvertedFromMultipleVotingSharesMember_a64bf0e9-05ad-477f-bc27-411ce8535f2e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassCOrdinarySharesMember_90081b1c-5509-4dea-8610-98ca98c8a896" xlink:href="tixt-20231231.xsd#tixt_ClassCOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_334d98df-925f-4135-b4d2-dd7cfd361f44" xlink:to="loc_tixt_ClassCOrdinarySharesMember_90081b1c-5509-4dea-8610-98ca98c8a896" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:href="tixt-20231231.xsd#tixt_ChangesInOwnersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_StatementOfChangesInEquityLineItems_a67935a6-7cdc-4861-818a-eba7bde42ac9" xlink:to="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding_35430e4c-c901-4cc3-8f82-7a0a54ed06fa" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_NumberOfSharesOutstanding_35430e4c-c901-4cc3-8f82-7a0a54ed06fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_206e8034-ecd0-412b-a4d6-2ea3cbbf4658" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_Equity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_Equity_206e8034-ecd0-412b-a4d6-2ea3cbbf4658" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLoss_a01137b1-adbc-46b8-b702-433ad0772407" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_ProfitLoss_a01137b1-adbc-46b8-b702-433ad0772407" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncome_6893c178-8d5b-4204-b228-cbeaf27b7fd3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_OtherComprehensiveIncome_6893c178-8d5b-4204-b228-cbeaf27b7fd3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesExchangedOrRedesignated_6af53783-91f7-4b4d-b5e9-9444c4b59278" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesExchangedOrRedesignated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_NumberOfSharesExchangedOrRedesignated_6af53783-91f7-4b4d-b5e9-9444c4b59278" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ValueOfNumberOfSharesExchangedOrRedesignated_1ec655e9-8ff7-46ef-bbc5-278e130c13c1" xlink:href="tixt-20231231.xsd#tixt_ValueOfNumberOfSharesExchangedOrRedesignated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_ValueOfNumberOfSharesExchangedOrRedesignated_1ec655e9-8ff7-46ef-bbc5-278e130c13c1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesConverted_4a1fe6e1-c3e5-44df-bbcc-1d0747c676bf" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_NumberOfSharesConverted_4a1fe6e1-c3e5-44df-bbcc-1d0747c676bf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ConversionOfStockValueOfSharesConverted_41c09d21-e91b-45f3-8ce7-1f64b810ae49" xlink:href="tixt-20231231.xsd#tixt_ConversionOfStockValueOfSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_ConversionOfStockValueOfSharesConverted_41c09d21-e91b-45f3-8ce7-1f64b810ae49" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesIssuedInPublicOffering_fb62dfd3-8d5b-45a7-b294-b540baca372f" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesIssuedInPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_NumberOfSharesIssuedInPublicOffering_fb62dfd3-8d5b-45a7-b294-b540baca372f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ValueOfSharesIssuedInPublicOffering_84270ed0-c5ee-45fa-a752-0abe25c3ac6d" xlink:href="tixt-20231231.xsd#tixt_ValueOfSharesIssuedInPublicOffering"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_ValueOfSharesIssuedInPublicOffering_84270ed0-c5ee-45fa-a752-0abe25c3ac6d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShareIssueRelatedCost_06560426-7efe-43d8-bf78-a4208a05d06e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ShareIssueRelatedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_ShareIssueRelatedCost_06560426-7efe-43d8-bf78-a4208a05d06e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_725a1f55-91c3-41a8-814c-76d718d77aa7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughSharebasedPaymentTransactions_725a1f55-91c3-41a8-814c-76d718d77aa7" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaid_a36d1086-cecd-4896-8df6-96b8340c9eb7" xlink:href="tixt-20231231.xsd#tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaid_a36d1086-cecd-4896-8df6-96b8340c9eb7" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaidShares_a1f0bf65-a59a-452f-b773-15597978999b" xlink:href="tixt-20231231.xsd#tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaidShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_CarryingValueOfBusinessAcquiredLessFairValueOfConsiderationPaidShares_a1f0bf65-a59a-452f-b773-15597978999b" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseThroughShareBasedPaymentTransactionsShares_f6be6987-8941-4ff6-82e8-bc38c50fa5d6" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseThroughShareBasedPaymentTransactionsShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangesInOwnersEquityRollForward_16424ee5-d585-455d-8d4e-aabb264f182d" xlink:to="loc_tixt_IncreaseDecreaseThroughShareBasedPaymentTransactionsShares_f6be6987-8941-4ff6-82e8-bc38c50fa5d6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesOutstanding_72c5addd-362b-4ee3-a96c-b418eb5ba61e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Equity_8f8843d0-74c9-4eb4-a1c4-f8145d410373" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_Equity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesNarrativeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SummaryofsignificantaccountingpoliciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_763d7f4f-e21f-4a6b-aba7-11fa5581d68b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_763d7f4f-e21f-4a6b-aba7-11fa5581d68b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_55461aae-51eb-4b7b-a04e-eb674ac03414" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_763d7f4f-e21f-4a6b-aba7-11fa5581d68b" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_55461aae-51eb-4b7b-a04e-eb674ac03414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_55461aae-51eb-4b7b-a04e-eb674ac03414_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_55461aae-51eb-4b7b-a04e-eb674ac03414" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_55461aae-51eb-4b7b-a04e-eb674ac03414_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_8dbf4830-7932-4645-a2d6-650366722e00" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_55461aae-51eb-4b7b-a04e-eb674ac03414" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_8dbf4830-7932-4645-a2d6-650366722e00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_8814d3c5-e393-4953-b93a-c238ae2cb7bb" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_8dbf4830-7932-4645-a2d6-650366722e00" xlink:to="loc_ifrs-full_OrdinarySharesMember_8814d3c5-e393-4953-b93a-c238ae2cb7bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_90b796f4-8c08-43da-b3ac-7615901ca68a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_763d7f4f-e21f-4a6b-aba7-11fa5581d68b" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_90b796f4-8c08-43da-b3ac-7615901ca68a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_90b796f4-8c08-43da-b3ac-7615901ca68a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_90b796f4-8c08-43da-b3ac-7615901ca68a" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_90b796f4-8c08-43da-b3ac-7615901ca68a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_8afc69f3-f9bb-4b54-af7c-0939db02a4b5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_90b796f4-8c08-43da-b3ac-7615901ca68a" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_8afc69f3-f9bb-4b54-af7c-0939db02a4b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitsMember_5d2186a4-5eab-4e31-8668-b1440484beb0" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_8afc69f3-f9bb-4b54-af7c-0939db02a4b5" xlink:to="loc_tixt_RestrictedStockUnitsMember_5d2186a4-5eab-4e31-8668-b1440484beb0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_bc249f14-713a-4c6b-9b58-25a05b240ad8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_763d7f4f-e21f-4a6b-aba7-11fa5581d68b" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_bc249f14-713a-4c6b-9b58-25a05b240ad8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_bc249f14-713a-4c6b-9b58-25a05b240ad8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_bc249f14-713a-4c6b-9b58-25a05b240ad8" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_bc249f14-713a-4c6b-9b58-25a05b240ad8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfe80e49-3e06-4b51-8773-099a8102a347" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_bc249f14-713a-4c6b-9b58-25a05b240ad8" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfe80e49-3e06-4b51-8773-099a8102a347" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WillowTreeMember_2a3f18f8-f526-4159-8c9c-8f654bdcb64e" xlink:href="tixt-20231231.xsd#tixt_WillowTreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfe80e49-3e06-4b51-8773-099a8102a347" xlink:to="loc_tixt_WillowTreeMember_2a3f18f8-f526-4159-8c9c-8f654bdcb64e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_d6530a83-d6f2-41e3-911d-a9d73ff31f0c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProportionOfOwnershipInterestInSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_ifrs-full_ProportionOfOwnershipInterestInSubsidiary_d6530a83-d6f2-41e3-911d-a9d73ff31f0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_EquityAccountedAwardsGrantDateFairValueNumberOfShares_097a3587-b292-432f-b154-9cc21cb41ea0" xlink:href="tixt-20231231.xsd#tixt_EquityAccountedAwardsGrantDateFairValueNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_tixt_EquityAccountedAwardsGrantDateFairValueNumberOfShares_097a3587-b292-432f-b154-9cc21cb41ea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LiabilityAccountedAwardsMarketPriceMultiplierNumberOfShares_7a402d44-7a26-4d4b-8ec9-ccf4c66cf0b1" xlink:href="tixt-20231231.xsd#tixt_LiabilityAccountedAwardsMarketPriceMultiplierNumberOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_tixt_LiabilityAccountedAwardsMarketPriceMultiplierNumberOfShares_7a402d44-7a26-4d4b-8ec9-ccf4c66cf0b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonShareSplitRatio_0383fa8c-3621-40f5-8e23-0de33e500b96" xlink:href="tixt-20231231.xsd#tixt_CommonShareSplitRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_tixt_CommonShareSplitRatio_0383fa8c-3621-40f5-8e23-0de33e500b96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OperatingSegmentsNumber_74dd214d-b593-494b-879c-f6c084c1ea7b" xlink:href="tixt-20231231.xsd#tixt_OperatingSegmentsNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_tixt_OperatingSegmentsNumber_74dd214d-b593-494b-879c-f6c084c1ea7b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfReportingSegments_1f300c92-ff0d-4874-a27a-ded2c139aff0" xlink:href="tixt-20231231.xsd#tixt_NumberOfReportingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_0cf2013a-973d-4821-9005-690331b2c03b" xlink:to="loc_tixt_NumberOfReportingSegments_1f300c92-ff0d-4874-a27a-ded2c139aff0" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesUsefullivespropertyplantandequipmentandrightofuseleaseassetsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SummaryofsignificantaccountingpoliciesUsefullivespropertyplantandequipmentandrightofuseleaseassetsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesUsefullivespropertyplantandequipmentandrightofuseleaseassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_e993e677-3138-4cfa-a915-c758bb211646" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_d702a2cc-d5af-4727-94e4-77f3c56e5d6d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_e993e677-3138-4cfa-a915-c758bb211646" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_d702a2cc-d5af-4727-94e4-77f3c56e5d6d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_16f11a31-1bfe-4553-ab48-1bf31e10285a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_d702a2cc-d5af-4727-94e4-77f3c56e5d6d" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_16f11a31-1bfe-4553-ab48-1bf31e10285a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember_16f11a31-1bfe-4553-ab48-1bf31e10285a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_16f11a31-1bfe-4553-ab48-1bf31e10285a" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentMember_16f11a31-1bfe-4553-ab48-1bf31e10285a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_16f11a31-1bfe-4553-ab48-1bf31e10285a" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ComputerHardwareAndNetworkAssetsMember_c6564f94-9f75-40e3-98a6-c2b6e01157c7" xlink:href="tixt-20231231.xsd#tixt_ComputerHardwareAndNetworkAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:to="loc_tixt_ComputerHardwareAndNetworkAssetsMember_c6564f94-9f75-40e3-98a6-c2b6e01157c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BuildingsAndLeaseholdImprovementsMember_362413b4-25b2-4275-87ba-0a8e6b1427e5" xlink:href="tixt-20231231.xsd#tixt_BuildingsAndLeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:to="loc_tixt_BuildingsAndLeaseholdImprovementsMember_362413b4-25b2-4275-87ba-0a8e6b1427e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FixturesAndFittingsMember_9d719469-af5e-4aea-9c6b-9d54be26af1b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FixturesAndFittingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:to="loc_ifrs-full_FixturesAndFittingsMember_9d719469-af5e-4aea-9c6b-9d54be26af1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RightofuseAssetsMember_fb261f7a-018d-4c5c-8fa9-bb8a27080fa3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RightofuseAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_833ca480-b230-4ecd-9236-85d52d0c2e32" xlink:to="loc_ifrs-full_RightofuseAssetsMember_fb261f7a-018d-4c5c-8fa9-bb8a27080fa3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_bff23e44-b9ce-4b95-96b8-7efb11c7dba8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_d702a2cc-d5af-4727-94e4-77f3c56e5d6d" xlink:to="loc_ifrs-full_RangeAxis_bff23e44-b9ce-4b95-96b8-7efb11c7dba8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_bff23e44-b9ce-4b95-96b8-7efb11c7dba8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_bff23e44-b9ce-4b95-96b8-7efb11c7dba8" xlink:to="loc_ifrs-full_RangesMember_bff23e44-b9ce-4b95-96b8-7efb11c7dba8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_c7d99264-2724-46e2-9e14-ba62d82bed0d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_bff23e44-b9ce-4b95-96b8-7efb11c7dba8" xlink:to="loc_ifrs-full_RangesMember_c7d99264-2724-46e2-9e14-ba62d82bed0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_1dcf94d5-6138-4c49-9c8e-680620770167" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_c7d99264-2724-46e2-9e14-ba62d82bed0d" xlink:to="loc_ifrs-full_BottomOfRangeMember_1dcf94d5-6138-4c49-9c8e-680620770167" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_4c65a68d-b9ee-48f5-9c0d-7b11c57d0d6a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_c7d99264-2724-46e2-9e14-ba62d82bed0d" xlink:to="loc_ifrs-full_TopOfRangeMember_4c65a68d-b9ee-48f5-9c0d-7b11c57d0d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_d6169683-6fd9-4f81-a3fd-c5215bd90a2f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_e993e677-3138-4cfa-a915-c758bb211646" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimePropertyPlantAndEquipment_d6169683-6fd9-4f81-a3fd-c5215bd90a2f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesUsefullivesintangibleassetsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SummaryofsignificantaccountingpoliciesUsefullivesintangibleassetsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SummaryofsignificantaccountingpoliciesUsefullivesintangibleassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_77a27c50-24a9-484b-8073-54b9525f5de3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_d91fee92-6ff2-453d-9e73-fe8ade6c14a5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_77a27c50-24a9-484b-8073-54b9525f5de3" xlink:to="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_d91fee92-6ff2-453d-9e73-fe8ade6c14a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_e8c8a8f3-f78d-452f-b425-535141598816" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_d91fee92-6ff2-453d-9e73-fe8ade6c14a5" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_e8c8a8f3-f78d-452f-b425-535141598816" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e8c8a8f3-f78d-452f-b425-535141598816_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_e8c8a8f3-f78d-452f-b425-535141598816" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e8c8a8f3-f78d-452f-b425-535141598816_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis_e8c8a8f3-f78d-452f-b425-535141598816" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_79acac16-62a4-4edf-a89b-d64f7f25c8f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_79acac16-62a4-4edf-a89b-d64f7f25c8f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_170abd52-88bb-4d5a-b14e-b7e8ad729dea" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:to="loc_ifrs-full_ComputerSoftwareMember_170abd52-88bb-4d5a-b14e-b7e8ad729dea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_a4bd9536-0e96-4ecf-8af7-e37682fe7ab0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:to="loc_ifrs-full_BrandNamesMember_a4bd9536-0e96-4ecf-8af7-e37682fe7ab0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_StandardOperatingProceduresMember_e16dc2bb-f203-4d51-be85-704f54c4592f" xlink:href="tixt-20231231.xsd#tixt_StandardOperatingProceduresMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:to="loc_tixt_StandardOperatingProceduresMember_e16dc2bb-f203-4d51-be85-704f54c4592f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CrowdsourceAssetsMember_5623f54a-06f1-42d9-be25-3b84cbb7bc24" xlink:href="tixt-20231231.xsd#tixt_CrowdsourceAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_8d2942db-518d-45c7-ab53-1e3cc50e47b2" xlink:to="loc_tixt_CrowdsourceAssetsMember_5623f54a-06f1-42d9-be25-3b84cbb7bc24" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_66415e04-df67-44e3-9c3d-bc19f34a8f43" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsTable_d91fee92-6ff2-453d-9e73-fe8ade6c14a5" xlink:to="loc_ifrs-full_RangeAxis_66415e04-df67-44e3-9c3d-bc19f34a8f43" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_66415e04-df67-44e3-9c3d-bc19f34a8f43_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_66415e04-df67-44e3-9c3d-bc19f34a8f43" xlink:to="loc_ifrs-full_RangesMember_66415e04-df67-44e3-9c3d-bc19f34a8f43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_2a0b41f0-d344-49ba-857a-94add0956372" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_66415e04-df67-44e3-9c3d-bc19f34a8f43" xlink:to="loc_ifrs-full_RangesMember_2a0b41f0-d344-49ba-857a-94add0956372" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_a3ea2253-0694-4d82-9cee-6f6ae2d6c9a9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_2a0b41f0-d344-49ba-857a-94add0956372" xlink:to="loc_ifrs-full_BottomOfRangeMember_a3ea2253-0694-4d82-9cee-6f6ae2d6c9a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_9acb475a-6da6-43f3-bb26-887e88a0638f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_2a0b41f0-d344-49ba-857a-94add0956372" xlink:to="loc_ifrs-full_TopOfRangeMember_9acb475a-6da6-43f3-bb26-887e88a0638f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_5f35eacd-afc1-412a-90eb-57ca37b4b692" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfIntangibleAssetsLineItems_77a27c50-24a9-484b-8073-54b9525f5de3" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_5f35eacd-afc1-412a-90eb-57ca37b4b692" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/CapitalstructurefinancialpoliciesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#CapitalstructurefinancialpoliciesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/CapitalstructurefinancialpoliciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_39c5b87e-5863-4a58-a093-a42696e3e82d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_b5d43f78-fb39-43b8-a177-03a1f4cccad0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_39c5b87e-5863-4a58-a093-a42696e3e82d" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_b5d43f78-fb39-43b8-a177-03a1f4cccad0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_f1b31753-09d2-44d4-9bcd-69fa57e629f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_b5d43f78-fb39-43b8-a177-03a1f4cccad0" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_f1b31753-09d2-44d4-9bcd-69fa57e629f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_f1b31753-09d2-44d4-9bcd-69fa57e629f3_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_f1b31753-09d2-44d4-9bcd-69fa57e629f3" xlink:to="loc_ifrs-full_BorrowingsByNameMember_f1b31753-09d2-44d4-9bcd-69fa57e629f3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_fc4154d3-71a8-4a92-89a8-2b9c008c1098" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_f1b31753-09d2-44d4-9bcd-69fa57e629f3" xlink:to="loc_ifrs-full_BorrowingsByNameMember_fc4154d3-71a8-4a92-89a8-2b9c008c1098" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CreditFacilityMember_87100c9f-7b9d-44d6-a829-a5fc65f2ee37" xlink:href="tixt-20231231.xsd#tixt_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_fc4154d3-71a8-4a92-89a8-2b9c008c1098" xlink:to="loc_tixt_CreditFacilityMember_87100c9f-7b9d-44d6-a829-a5fc65f2ee37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_c193dae0-c9ff-4308-8f8a-4e9e482b7672" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_fc4154d3-71a8-4a92-89a8-2b9c008c1098" xlink:to="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_c193dae0-c9ff-4308-8f8a-4e9e482b7672" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncTermLoanMember_ee8af385-e6eb-4c12-9f3f-a2f7f9aaf099" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_fc4154d3-71a8-4a92-89a8-2b9c008c1098" xlink:to="loc_tixt_TelusInternationalCdaIncTermLoanMember_ee8af385-e6eb-4c12-9f3f-a2f7f9aaf099" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesIssued_1c9ffd26-6e4d-4381-8cdc-47acaca5e9b5" xlink:href="tixt-20231231.xsd#tixt_CommonSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_39c5b87e-5863-4a58-a093-a42696e3e82d" xlink:to="loc_tixt_CommonSharesIssued_1c9ffd26-6e4d-4381-8cdc-47acaca5e9b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_EquitySecuritiesSharesIssuedPricePerShare_62a96083-bc8a-42ae-81f4-d283fc03caa2" xlink:href="tixt-20231231.xsd#tixt_EquitySecuritiesSharesIssuedPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_39c5b87e-5863-4a58-a093-a42696e3e82d" xlink:to="loc_tixt_EquitySecuritiesSharesIssuedPricePerShare_62a96083-bc8a-42ae-81f4-d283fc03caa2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_1acde570-581f-4252-85d7-d6b2bb5a9e75" xlink:href="tixt-20231231.xsd#tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfObjectivesPoliciesAndProcessesForManagingCapitalLineItems_39c5b87e-5863-4a58-a093-a42696e3e82d" xlink:to="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_1acde570-581f-4252-85d7-d6b2bb5a9e75" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/RevenuefromcontractswithcustomersDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#RevenuefromcontractswithcustomersDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/RevenuefromcontractswithcustomersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_3aa302b7-9930-487a-8eb6-864fd23d6133" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_a08389a6-a5c8-4d04-b95a-dfa344013a1b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_3aa302b7-9930-487a-8eb6-864fd23d6133" xlink:to="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_a08389a6-a5c8-4d04-b95a-dfa344013a1b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesAxis_cd61b8eb-ac01-4535-9ad7-11b0285c7320" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProductsAndServicesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_a08389a6-a5c8-4d04-b95a-dfa344013a1b" xlink:to="loc_ifrs-full_ProductsAndServicesAxis_cd61b8eb-ac01-4535-9ad7-11b0285c7320" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesMember_cd61b8eb-ac01-4535-9ad7-11b0285c7320_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProductsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_cd61b8eb-ac01-4535-9ad7-11b0285c7320" xlink:to="loc_ifrs-full_ProductsAndServicesMember_cd61b8eb-ac01-4535-9ad7-11b0285c7320_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProductsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ProductsAndServicesAxis_cd61b8eb-ac01-4535-9ad7-11b0285c7320" xlink:to="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TechAndGamesMember_da9c293b-4cec-49f5-b321-f9e3258066c9" xlink:href="tixt-20231231.xsd#tixt_TechAndGamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_TechAndGamesMember_da9c293b-4cec-49f5-b321-f9e3258066c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommunicationsAndMediaMember_bd843f72-c4f5-4763-8d31-c6215c8c72ee" xlink:href="tixt-20231231.xsd#tixt_CommunicationsAndMediaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_CommunicationsAndMediaMember_bd843f72-c4f5-4763-8d31-c6215c8c72ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ECommerceAndFinTechMember_5188e8de-58fc-49b3-9bdd-5d0ce2be8bc1" xlink:href="tixt-20231231.xsd#tixt_ECommerceAndFinTechMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_ECommerceAndFinTechMember_5188e8de-58fc-49b3-9bdd-5d0ce2be8bc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_HealthcareMember_6b8bf3b2-0d00-41b6-8de6-2a53084817c7" xlink:href="tixt-20231231.xsd#tixt_HealthcareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_HealthcareMember_6b8bf3b2-0d00-41b6-8de6-2a53084817c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BankingFinancialServicesAndInsuranceMember_986a2ee5-85ff-4d14-8141-67d604636f52" xlink:href="tixt-20231231.xsd#tixt_BankingFinancialServicesAndInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_BankingFinancialServicesAndInsuranceMember_986a2ee5-85ff-4d14-8141-67d604636f52" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OtherRevenueMember_a90c26ef-e3e7-4d4b-a384-d56af8cc109b" xlink:href="tixt-20231231.xsd#tixt_OtherRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ProductsAndServicesMember_205a423a-c037-4a6c-8af5-00c1b382b6c8" xlink:to="loc_tixt_OtherRevenueMember_a90c26ef-e3e7-4d4b-a384-d56af8cc109b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasAxis_3a80a078-3fad-4724-b721-61fb7a1ecde7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_a08389a6-a5c8-4d04-b95a-dfa344013a1b" xlink:to="loc_ifrs-full_GeographicalAreasAxis_3a80a078-3fad-4724-b721-61fb7a1ecde7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember_3a80a078-3fad-4724-b721-61fb7a1ecde7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_GeographicalAreasAxis_3a80a078-3fad-4724-b721-61fb7a1ecde7" xlink:to="loc_ifrs-full_GeographicalAreasMember_3a80a078-3fad-4724-b721-61fb7a1ecde7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_GeographicalAreasAxis_3a80a078-3fad-4724-b721-61fb7a1ecde7" xlink:to="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EuropeMember_766b1519-1b06-4669-abed-cc46b2b90c2b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EuropeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:to="loc_srt_EuropeMember_766b1519-1b06-4669-abed-cc46b2b90c2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NorthAmericaMember_2b2bf0de-fe66-475d-9ce2-2bea088f8870" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_NorthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:to="loc_srt_NorthAmericaMember_2b2bf0de-fe66-475d-9ce2-2bea088f8870" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AsiaPacificMember_559d02e2-9c5e-4a96-b37f-cc68357bc984" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AsiaPacificMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:to="loc_srt_AsiaPacificMember_559d02e2-9c5e-4a96-b37f-cc68357bc984" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CentralAmericaSouthAmericaAfricaMember_b3677e14-8307-4527-b06f-79a80e5d5d1a" xlink:href="tixt-20231231.xsd#tixt_CentralAmericaSouthAmericaAfricaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_63e5789f-3567-44ad-86ca-b638e4757351" xlink:to="loc_tixt_CentralAmericaSouthAmericaAfricaMember_b3677e14-8307-4527-b06f-79a80e5d5d1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_2206385a-55e6-49dc-b419-ef56b08c051e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_3aa302b7-9930-487a-8eb6-864fd23d6133" xlink:to="loc_ifrs-full_RevenueFromContractsWithCustomers_2206385a-55e6-49dc-b419-ef56b08c051e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationRestrictedshareunitplanDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationRestrictedshareunitplanDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationRestrictedshareunitplanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_dc9aacd3-fe0a-4a7e-af24-122a6b0d3484" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_dc9aacd3-fe0a-4a7e-af24-122a6b0d3484" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_050a4ac6-f546-42eb-8fbb-a918fe851170" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_dc9aacd3-fe0a-4a7e-af24-122a6b0d3484" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_050a4ac6-f546-42eb-8fbb-a918fe851170" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_050a4ac6-f546-42eb-8fbb-a918fe851170_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_050a4ac6-f546-42eb-8fbb-a918fe851170" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_050a4ac6-f546-42eb-8fbb-a918fe851170_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_50382eb7-4e20-4f54-bfa6-854c41889f25" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_050a4ac6-f546-42eb-8fbb-a918fe851170" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_50382eb7-4e20-4f54-bfa6-854c41889f25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_c410ebeb-798f-42c2-aea6-e2b0cbae4177" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_50382eb7-4e20-4f54-bfa6-854c41889f25" xlink:to="loc_ifrs-full_OrdinarySharesMember_c410ebeb-798f-42c2-aea6-e2b0cbae4177" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_5e81c103-7e1a-420e-9256-6c4646a2f6d9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_dc9aacd3-fe0a-4a7e-af24-122a6b0d3484" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_5e81c103-7e1a-420e-9256-6c4646a2f6d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_5e81c103-7e1a-420e-9256-6c4646a2f6d9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_5e81c103-7e1a-420e-9256-6c4646a2f6d9" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_5e81c103-7e1a-420e-9256-6c4646a2f6d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_5e81c103-7e1a-420e-9256-6c4646a2f6d9" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PerformanceShareUnitsMember_70d45940-0a44-4578-879a-86a2fb874753" xlink:href="tixt-20231231.xsd#tixt_PerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:to="loc_tixt_PerformanceShareUnitsMember_70d45940-0a44-4578-879a-86a2fb874753" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitsMember_0da5056e-d475-44f7-89f2-02f9f9586fed" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:to="loc_tixt_RestrictedStockUnitsMember_0da5056e-d475-44f7-89f2-02f9f9586fed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsMember_4b752f6e-73fa-4862-9013-afd87194b6f7" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:to="loc_tixt_PhantomRestrictedShareUnitsMember_4b752f6e-73fa-4862-9013-afd87194b6f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomPerformanceShareUnitsMember_101b9e53-bb41-43b1-934b-cbab81784ee3" xlink:href="tixt-20231231.xsd#tixt_PhantomPerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_64f5faaf-76da-4b96-b757-0b00dfea1fde" xlink:to="loc_tixt_PhantomPerformanceShareUnitsMember_101b9e53-bb41-43b1-934b-cbab81784ee3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_75e379e6-453d-44dc-badd-9f804fe84cc7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_dc9aacd3-fe0a-4a7e-af24-122a6b0d3484" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_75e379e6-453d-44dc-badd-9f804fe84cc7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_75e379e6-453d-44dc-badd-9f804fe84cc7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_75e379e6-453d-44dc-badd-9f804fe84cc7" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_75e379e6-453d-44dc-badd-9f804fe84cc7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_68f60346-3fd1-4c29-a177-7f7e37353a6e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_75e379e6-453d-44dc-badd-9f804fe84cc7" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_68f60346-3fd1-4c29-a177-7f7e37353a6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PlaymentMember_a63f1f8a-a841-49e2-aa5f-8d3eab8b15a2" xlink:href="tixt-20231231.xsd#tixt_PlaymentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_68f60346-3fd1-4c29-a177-7f7e37353a6e" xlink:to="loc_tixt_PlaymentMember_a63f1f8a-a841-49e2-aa5f-8d3eab8b15a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitNominalValueInEquityShares_0a46893b-20d5-42ef-a3dc-98c1b0b9a67c" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitNominalValueInEquityShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_tixt_RestrictedStockUnitNominalValueInEquityShares_0a46893b-20d5-42ef-a3dc-98c1b0b9a67c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments_fdcd9523-d603-46fc-b9be-daa0fd0ea24a" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments_fdcd9523-d603-46fc-b9be-daa0fd0ea24a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_5ee22efc-98c7-483b-9139-e526f1386c11" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DescriptionOfOptionLifeShareOptionsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_5ee22efc-98c7-483b-9139-e526f1386c11" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_a6476a32-60b5-4c2c-adc2-13545b016506" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_a6476a32-60b5-4c2c-adc2-13545b016506" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_cabd0529-0094-4748-974e-3dfc68798539" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_58e1535d-7a25-4adf-bccd-cf010e1ad0dc" xlink:to="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_cabd0529-0094-4748-974e-3dfc68798539" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationScheduleofrestrictedshareunitsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationScheduleofrestrictedshareunitsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationScheduleofrestrictedshareunitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_fe9fb175-6cc6-405d-b6b7-bd78e2f94d6c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_fe9fb175-6cc6-405d-b6b7-bd78e2f94d6c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2880ba7c-2401-4681-893b-23b794a06861" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_fe9fb175-6cc6-405d-b6b7-bd78e2f94d6c" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2880ba7c-2401-4681-893b-23b794a06861" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_2880ba7c-2401-4681-893b-23b794a06861_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2880ba7c-2401-4681-893b-23b794a06861" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_2880ba7c-2401-4681-893b-23b794a06861_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2880ba7c-2401-4681-893b-23b794a06861" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsUsDollarDenominatedMember_24e5f49e-ec12-4ea2-ab23-d78705a3a085" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsUsDollarDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PhantomRestrictedShareUnitsUsDollarDenominatedMember_24e5f49e-ec12-4ea2-ab23-d78705a3a085" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsCanadianDollarDenominatedMember_8dfec54f-b3cd-4ac5-ac35-400ed63eba3a" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsCanadianDollarDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PhantomRestrictedShareUnitsCanadianDollarDenominatedMember_8dfec54f-b3cd-4ac5-ac35-400ed63eba3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsSettledWithSubordinateVotingSharesMember_b51244be-c992-4cf0-8f7d-35bf9ab69289" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsSettledWithSubordinateVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PhantomRestrictedShareUnitsSettledWithSubordinateVotingSharesMember_b51244be-c992-4cf0-8f7d-35bf9ab69289" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsAndPhantomShareUnitsSettledWithCashMember_48aba646-d5b5-4bd7-a207-9b7fa9acb8d1" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsAndPhantomShareUnitsSettledWithCashMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PhantomRestrictedShareUnitsAndPhantomShareUnitsSettledWithCashMember_48aba646-d5b5-4bd7-a207-9b7fa9acb8d1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsMember_1466016f-15b0-4336-ab6c-0b5ce9b077f7" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PhantomRestrictedShareUnitsMember_1466016f-15b0-4336-ab6c-0b5ce9b077f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitsMember_b31ebb31-1406-4278-b34c-bdcfe14be97a" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_RestrictedStockUnitsMember_b31ebb31-1406-4278-b34c-bdcfe14be97a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PerformanceShareUnitsMember_ae38e38c-b321-4736-a425-37fb4ed00687" xlink:href="tixt-20231231.xsd#tixt_PerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_1ac491c1-8f3c-4f22-8e66-fcd2044fc8b4" xlink:to="loc_tixt_PerformanceShareUnitsMember_ae38e38c-b321-4736-a425-37fb4ed00687" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_66d0e168-6419-40b0-a6cb-8f5505599228" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_fe9fb175-6cc6-405d-b6b7-bd78e2f94d6c" xlink:to="loc_srt_ConsolidatedEntitiesAxis_66d0e168-6419-40b0-a6cb-8f5505599228" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_66d0e168-6419-40b0-a6cb-8f5505599228_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_66d0e168-6419-40b0-a6cb-8f5505599228" xlink:to="loc_srt_ConsolidatedEntitiesDomain_66d0e168-6419-40b0-a6cb-8f5505599228_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_3128299b-1c28-4000-87a4-e572caa86a11" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_66d0e168-6419-40b0-a6cb-8f5505599228" xlink:to="loc_srt_ConsolidatedEntitiesDomain_3128299b-1c28-4000-87a4-e572caa86a11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_2598387e-dba7-49f3-a746-ce1bc43b014d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_3128299b-1c28-4000-87a4-e572caa86a11" xlink:to="loc_srt_ParentCompanyMember_2598387e-dba7-49f3-a746-ce1bc43b014d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:href="tixt-20231231.xsd#tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:to="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_47757e40-97d4-4ab9-9de9-34a84b8bfc02" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_47757e40-97d4-4ab9-9de9-34a84b8bfc02" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_eae161d3-e157-4947-8d59-33b2e10e5158" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_eae161d3-e157-4947-8d59-33b2e10e5158" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementVestedDuringPeriod_3254938a-650a-406e-8356-b5e5239f62d5" xlink:href="tixt-20231231.xsd#tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementVestedDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementVestedDuringPeriod_3254938a-650a-406e-8356-b5e5239f62d5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfInstrumentsOtherEquityInstrumentsIssuedInLieuOfDividends_b79613b7-2f70-4259-bb0d-019fe6592bf7" xlink:href="tixt-20231231.xsd#tixt_NumberOfInstrumentsOtherEquityInstrumentsIssuedInLieuOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_tixt_NumberOfInstrumentsOtherEquityInstrumentsIssuedInLieuOfDividends_b79613b7-2f70-4259-bb0d-019fe6592bf7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementDividendsDuringThePeriod_61c28f65-d3f0-4bee-a96c-ce53a6ffc2af" xlink:href="tixt-20231231.xsd#tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementDividendsDuringThePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_tixt_NumberOfOtherEquityInstrumentsNonvestedInSharebasedPaymentArrangementDividendsDuringThePeriod_61c28f65-d3f0-4bee-a96c-ce53a6ffc2af" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_a43526fb-81d8-4d11-bd59-72bd54072fdf" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_a43526fb-81d8-4d11-bd59-72bd54072fdf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement_12f1dd00-331f-48dd-b920-ec38af3914d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement_6b2bd7a3-7929-4cf7-ac7f-79ad186b9ea0" xlink:href="tixt-20231231.xsd#tixt_NumberOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_14d6cd65-3e7d-4a63-b624-de00de3ec493" xlink:to="loc_tixt_NumberOfOtherEquityInstrumentsGrantedInSharebasedPaymentArrangement_6b2bd7a3-7929-4cf7-ac7f-79ad186b9ea0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement_8f6cbaa7-dbaa-4345-ab15-3120f767ce9a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement_8f6cbaa7-dbaa-4345-ab15-3120f767ce9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfOtherEquityInstrumentsVestedInSharebasedPaymentArrangement_bef2e388-afb6-4fd2-85d0-cf3f01ab3327" xlink:href="tixt-20231231.xsd#tixt_NumberOfOtherEquityInstrumentsVestedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:to="loc_tixt_NumberOfOtherEquityInstrumentsVestedInSharebasedPaymentArrangement_bef2e388-afb6-4fd2-85d0-cf3f01ab3327" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfInstrumentsOtherEquityInstrumentsVestedInLieuOfDividends_bd189a6f-8b1c-400e-8898-ae45130ef917" xlink:href="tixt-20231231.xsd#tixt_NumberOfInstrumentsOtherEquityInstrumentsVestedInLieuOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:to="loc_tixt_NumberOfInstrumentsOtherEquityInstrumentsVestedInLieuOfDividends_bd189a6f-8b1c-400e-8898-ae45130ef917" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_d9abc34b-0e38-492b-bbf4-3ffbbd0379df" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedNumberOfSharesRollForward_70f07da9-af8e-4b5d-b566-2508da69a1f7" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement_d9abc34b-0e38-492b-bbf4-3ffbbd0379df" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement_ee2ad3a8-39e5-4cbe-aab1-f8f19b9fe57d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:href="tixt-20231231.xsd#tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:to="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageGrantDateFairValueOtherEquityInstruments_f9a1fffe-3192-4b6a-9b4a-4f0a3292e7c4" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageGrantDateFairValueOtherEquityInstruments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_tixt_WeightedAverageGrantDateFairValueOtherEquityInstruments_f9a1fffe-3192-4b6a-9b4a-4f0a3292e7c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_29cb8838-40a9-4900-8ff2-1accb97174ab" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_29cb8838-40a9-4900-8ff2-1accb97174ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsVestedInPeriod_6a98d245-debb-421b-81b9-5e45aa3da9b0" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsVestedInPeriod_6a98d245-debb-421b-81b9-5e45aa3da9b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsIssuedInLieuOfDividendsInPeriod_810d80b1-cd61-427b-83aa-74f57af9b452" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsIssuedInLieuOfDividendsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsIssuedInLieuOfDividendsInPeriod_810d80b1-cd61-427b-83aa-74f57af9b452" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_e8f3365b-713a-40c0-a8b9-f1893df684f8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement2019_e8f3365b-713a-40c0-a8b9-f1893df684f8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod_9d257fb4-da0a-4d0a-9717-50dbafe7016a" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DisclosureOfInstrumentsOtherThanOptionsWeightedAverageGrantDateFairValueRollForward_c9f395e1-9c2d-4678-8ad4-f5c3d9170c9d" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod_9d257fb4-da0a-4d0a-9717-50dbafe7016a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageGrantDateFairValueOtherEquityInstruments_bc66465f-38d9-4c88-a17b-1f964cf189d1" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageGrantDateFairValueOtherEquityInstruments"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_992b2f62-2a52-467d-a8d6-d7a07df1db19" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_255734e1-6a6c-483a-a10e-2b424320b639" xlink:to="loc_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_992b2f62-2a52-467d-a8d6-d7a07df1db19" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationPhantomTELUSCorporationrestrictedshareunitsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationPhantomTELUSCorporationrestrictedshareunitsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationPhantomTELUSCorporationrestrictedshareunitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_1b186c13-10af-4ec6-8c68-4ac988df665e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_1b186c13-10af-4ec6-8c68-4ac988df665e" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_0f59dca9-b28d-4393-a64c-35a69d4d203e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_0f59dca9-b28d-4393-a64c-35a69d4d203e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_0f59dca9-b28d-4393-a64c-35a69d4d203e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_0f59dca9-b28d-4393-a64c-35a69d4d203e" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_0f59dca9-b28d-4393-a64c-35a69d4d203e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_52472a6b-cbf8-48c1-8673-4c13a15f3808" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_0f59dca9-b28d-4393-a64c-35a69d4d203e" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_52472a6b-cbf8-48c1-8673-4c13a15f3808" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_3188bb2e-e952-4971-b13a-7be34e5f7f85" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_52472a6b-cbf8-48c1-8673-4c13a15f3808" xlink:to="loc_ifrs-full_OrdinarySharesMember_3188bb2e-e952-4971-b13a-7be34e5f7f85" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_a0955496-f80b-468e-b3ca-16c604ec1f15" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_99a487cb-f4a0-411c-8b90-f0c4b1fb3ef7" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_a0955496-f80b-468e-b3ca-16c604ec1f15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsMember_49cfb0b4-9a81-4c1f-9de8-c2c50c94a97e" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_a0955496-f80b-468e-b3ca-16c604ec1f15" xlink:to="loc_tixt_PhantomRestrictedShareUnitsMember_49cfb0b4-9a81-4c1f-9de8-c2c50c94a97e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitsMember_7e09ede0-53da-4384-adc9-f494be15b20b" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_a0955496-f80b-468e-b3ca-16c604ec1f15" xlink:to="loc_tixt_RestrictedStockUnitsMember_7e09ede0-53da-4384-adc9-f494be15b20b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_8f9a916f-d51f-44cf-a4d9-ba159d07ae42" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:to="loc_srt_ConsolidatedEntitiesAxis_8f9a916f-d51f-44cf-a4d9-ba159d07ae42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_8f9a916f-d51f-44cf-a4d9-ba159d07ae42_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8f9a916f-d51f-44cf-a4d9-ba159d07ae42" xlink:to="loc_srt_ConsolidatedEntitiesDomain_8f9a916f-d51f-44cf-a4d9-ba159d07ae42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_e9bc5d04-8a37-46f8-b8b9-6cbaba3765a6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8f9a916f-d51f-44cf-a4d9-ba159d07ae42" xlink:to="loc_srt_ConsolidatedEntitiesDomain_e9bc5d04-8a37-46f8-b8b9-6cbaba3765a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_08202e7b-b1fc-4e74-a985-97bac7d62d32" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_e9bc5d04-8a37-46f8-b8b9-6cbaba3765a6" xlink:to="loc_srt_ParentCompanyMember_08202e7b-b1fc-4e74-a985-97bac7d62d32" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_46cc97f9-c9e2-4cfa-a605-94b69659ab8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_9d3e97eb-1249-4f8c-8d97-fd2308a20ad8" xlink:to="loc_ifrs-full_RangeAxis_46cc97f9-c9e2-4cfa-a605-94b69659ab8d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_46cc97f9-c9e2-4cfa-a605-94b69659ab8d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_46cc97f9-c9e2-4cfa-a605-94b69659ab8d" xlink:to="loc_ifrs-full_RangesMember_46cc97f9-c9e2-4cfa-a605-94b69659ab8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_5da88aea-0449-4afe-a6f4-b978f761e2ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_46cc97f9-c9e2-4cfa-a605-94b69659ab8d" xlink:to="loc_ifrs-full_RangesMember_5da88aea-0449-4afe-a6f4-b978f761e2ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_825b7455-e5fd-451c-aa54-e1547c158a77" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_5da88aea-0449-4afe-a6f4-b978f761e2ac" xlink:to="loc_ifrs-full_BottomOfRangeMember_825b7455-e5fd-451c-aa54-e1547c158a77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_b9dc5822-5995-48b3-bba7-d0be7527e69b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_5da88aea-0449-4afe-a6f4-b978f761e2ac" xlink:to="loc_ifrs-full_TopOfRangeMember_b9dc5822-5995-48b3-bba7-d0be7527e69b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitNominalValueInEquityShares_aab4c071-a1cf-437e-ab72-3bfa9d18034a" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitNominalValueInEquityShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_1b186c13-10af-4ec6-8c68-4ac988df665e" xlink:to="loc_tixt_RestrictedStockUnitNominalValueInEquityShares_aab4c071-a1cf-437e-ab72-3bfa9d18034a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_992a361c-5c91-411c-8f6d-f394f097af74" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_1b186c13-10af-4ec6-8c68-4ac988df665e" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_992a361c-5c91-411c-8f6d-f394f097af74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement_d7712a85-9718-492f-915a-79cdfd405603" xlink:href="tixt-20231231.xsd#tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_1b186c13-10af-4ec6-8c68-4ac988df665e" xlink:to="loc_tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement_d7712a85-9718-492f-915a-79cdfd405603" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationShareoptionawardsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationShareoptionawardsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationShareoptionawardsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_f6c3c34d-236b-4bab-81fa-76965380de1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_f6c3c34d-236b-4bab-81fa-76965380de1e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_3a0b6d2e-5c5e-4758-a999-abea5735f426" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_f6c3c34d-236b-4bab-81fa-76965380de1e" xlink:to="loc_ifrs-full_RangeAxis_3a0b6d2e-5c5e-4758-a999-abea5735f426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_3a0b6d2e-5c5e-4758-a999-abea5735f426_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_3a0b6d2e-5c5e-4758-a999-abea5735f426" xlink:to="loc_ifrs-full_RangesMember_3a0b6d2e-5c5e-4758-a999-abea5735f426_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_04de92d2-9ab4-4fec-9340-3842846d6e54" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_3a0b6d2e-5c5e-4758-a999-abea5735f426" xlink:to="loc_ifrs-full_RangesMember_04de92d2-9ab4-4fec-9340-3842846d6e54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_2ecf5a99-4a4c-42c7-bf6e-ec719bacf59a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_04de92d2-9ab4-4fec-9340-3842846d6e54" xlink:to="loc_ifrs-full_BottomOfRangeMember_2ecf5a99-4a4c-42c7-bf6e-ec719bacf59a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_7d82a444-78a5-4b5b-b2c4-bbcb58ef77c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_04de92d2-9ab4-4fec-9340-3842846d6e54" xlink:to="loc_ifrs-full_TopOfRangeMember_7d82a444-78a5-4b5b-b2c4-bbcb58ef77c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_e00e604b-efa5-4b35-af08-e39d1cbcb179" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_f6c3c34d-236b-4bab-81fa-76965380de1e" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_e00e604b-efa5-4b35-af08-e39d1cbcb179" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_e00e604b-efa5-4b35-af08-e39d1cbcb179_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_e00e604b-efa5-4b35-af08-e39d1cbcb179" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_e00e604b-efa5-4b35-af08-e39d1cbcb179_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_fe22313b-2960-474e-98f9-453c963c84c8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_e00e604b-efa5-4b35-af08-e39d1cbcb179" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_fe22313b-2960-474e-98f9-453c963c84c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsMember_02acd653-86f3-4c03-9d38-cef4748631d1" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_fe22313b-2960-474e-98f9-453c963c84c8" xlink:to="loc_tixt_ShareOptionAwardsMember_02acd653-86f3-4c03-9d38-cef4748631d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_EquityShareOptionAwardsMember_76381266-38c4-44c9-a386-330948719597" xlink:href="tixt-20231231.xsd#tixt_EquityShareOptionAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_fe22313b-2960-474e-98f9-453c963c84c8" xlink:to="loc_tixt_EquityShareOptionAwardsMember_76381266-38c4-44c9-a386-330948719597" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomShareOptionAwardsMember_85f77b02-0e0c-45c2-9a55-096cdc0eb387" xlink:href="tixt-20231231.xsd#tixt_PhantomShareOptionAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_fe22313b-2960-474e-98f9-453c963c84c8" xlink:to="loc_tixt_PhantomShareOptionAwardsMember_85f77b02-0e0c-45c2-9a55-096cdc0eb387" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingMethodAxis_ff44b498-62a4-48a7-a649-a029c0225abb" xlink:href="tixt-20231231.xsd#tixt_VestingMethodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_f6c3c34d-236b-4bab-81fa-76965380de1e" xlink:to="loc_tixt_VestingMethodAxis_ff44b498-62a4-48a7-a649-a029c0225abb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingMethodDomain_ff44b498-62a4-48a7-a649-a029c0225abb_default" xlink:href="tixt-20231231.xsd#tixt_VestingMethodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tixt_VestingMethodAxis_ff44b498-62a4-48a7-a649-a029c0225abb" xlink:to="loc_tixt_VestingMethodDomain_ff44b498-62a4-48a7-a649-a029c0225abb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingMethodDomain_f0f62a40-e58d-4130-abd8-1a46d2eb146f" xlink:href="tixt-20231231.xsd#tixt_VestingMethodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tixt_VestingMethodAxis_ff44b498-62a4-48a7-a649-a029c0225abb" xlink:to="loc_tixt_VestingMethodDomain_f0f62a40-e58d-4130-abd8-1a46d2eb146f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GradedVestingMethodMember_0de34beb-0e76-4286-9bd2-ba7a71eab85d" xlink:href="tixt-20231231.xsd#tixt_GradedVestingMethodMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_VestingMethodDomain_f0f62a40-e58d-4130-abd8-1a46d2eb146f" xlink:to="loc_tixt_GradedVestingMethodMember_0de34beb-0e76-4286-9bd2-ba7a71eab85d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CliffVestingMethodMember_3a75db07-e0d7-421b-b326-75fb946ecbc8" xlink:href="tixt-20231231.xsd#tixt_CliffVestingMethodMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_VestingMethodDomain_f0f62a40-e58d-4130-abd8-1a46d2eb146f" xlink:to="loc_tixt_CliffVestingMethodMember_3a75db07-e0d7-421b-b326-75fb946ecbc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ContractualLifeOfShareBasedAwards_c0789613-bcba-4d1c-ab66-fd8c65871dac" xlink:href="tixt-20231231.xsd#tixt_ContractualLifeOfShareBasedAwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_tixt_ContractualLifeOfShareBasedAwards_c0789613-bcba-4d1c-ab66-fd8c65871dac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_f2474a69-a7dc-4b0f-997e-91e298c6d14b" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_f2474a69-a7dc-4b0f-997e-91e298c6d14b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments_b6b35a10-14c8-42db-94fc-9ab930742230" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfVestingInstallments_b6b35a10-14c8-42db-94fc-9ab930742230" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_fd073305-02d6-41b8-93f2-0acf762468ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DescriptionOfOptionLifeShareOptionsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_ifrs-full_DescriptionOfOptionLifeShareOptionsGranted_fd073305-02d6-41b8-93f2-0acf762468ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement_622b1c84-108e-411f-9fe4-c42397a5c91b" xlink:href="tixt-20231231.xsd#tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_tixt_VariablePayoutOfAwardsInSharebasedPaymentArrangement_622b1c84-108e-411f-9fe4-c42397a5c91b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_c6f5fb4c-8220-48f8-9abd-ff711e462c33" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_2b001fd0-887f-4574-8979-f56f8859e5e0" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_c6f5fb4c-8220-48f8-9abd-ff711e462c33" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationScheduleofshareoptionawardsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationScheduleofshareoptionawardsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationScheduleofshareoptionawardsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_d9f159ec-1c54-42e8-b328-b547e9789646" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_d9f159ec-1c54-42e8-b328-b547e9789646" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_d9f159ec-1c54-42e8-b328-b547e9789646_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_d9f159ec-1c54-42e8-b328-b547e9789646" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_d9f159ec-1c54-42e8-b328-b547e9789646_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_d9f159ec-1c54-42e8-b328-b547e9789646" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsMember_d83ade41-b611-488b-80cc-cf91afc342b1" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:to="loc_tixt_ShareOptionAwardsMember_d83ade41-b611-488b-80cc-cf91afc342b1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsUsDollarDenominatedMember_12a9bfd3-d5a5-4082-9591-c4ff4faad7c0" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsUsDollarDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareOptionAwardsMember_d83ade41-b611-488b-80cc-cf91afc342b1" xlink:to="loc_tixt_ShareOptionAwardsUsDollarDenominatedMember_12a9bfd3-d5a5-4082-9591-c4ff4faad7c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsCanadianDollarDenominatedMember_52b1ca20-3038-4e68-8b7b-3396aa16b966" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsCanadianDollarDenominatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareOptionAwardsMember_d83ade41-b611-488b-80cc-cf91afc342b1" xlink:to="loc_tixt_ShareOptionAwardsCanadianDollarDenominatedMember_52b1ca20-3038-4e68-8b7b-3396aa16b966" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsSettledWithSharesFromTreasuryMember_313cf4ec-a05b-4cff-8aae-d7520d90ec2e" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsSettledWithSharesFromTreasuryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareOptionAwardsMember_d83ade41-b611-488b-80cc-cf91afc342b1" xlink:to="loc_tixt_ShareOptionAwardsSettledWithSharesFromTreasuryMember_313cf4ec-a05b-4cff-8aae-d7520d90ec2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionsAndPhantomShareOptionsMember_71cc593f-4151-492e-b25d-dd8304b841ea" xlink:href="tixt-20231231.xsd#tixt_ShareOptionsAndPhantomShareOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:to="loc_tixt_ShareOptionsAndPhantomShareOptionsMember_71cc593f-4151-492e-b25d-dd8304b841ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsTrancheAMember_d8d56d17-b3c0-4334-8233-6f359240e29f" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsTrancheAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:to="loc_tixt_ShareOptionAwardsTrancheAMember_d8d56d17-b3c0-4334-8233-6f359240e29f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareOptionAwardsTrancheBMember_3560c466-676f-4057-bf0c-fa9d686c3e1c" xlink:href="tixt-20231231.xsd#tixt_ShareOptionAwardsTrancheBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_2f6d59c6-22e9-4657-bdab-5728b95bdb28" xlink:to="loc_tixt_ShareOptionAwardsTrancheBMember_3560c466-676f-4057-bf0c-fa9d686c3e1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingOptionsAxis_fe87929b-f9f5-475f-92fa-c666241abbe2" xlink:href="tixt-20231231.xsd#tixt_VestingOptionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:to="loc_tixt_VestingOptionsAxis_fe87929b-f9f5-475f-92fa-c666241abbe2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingOptionsDomain_fe87929b-f9f5-475f-92fa-c666241abbe2_default" xlink:href="tixt-20231231.xsd#tixt_VestingOptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tixt_VestingOptionsAxis_fe87929b-f9f5-475f-92fa-c666241abbe2" xlink:to="loc_tixt_VestingOptionsDomain_fe87929b-f9f5-475f-92fa-c666241abbe2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_VestingOptionsDomain_a22406a7-3d20-4629-ab2a-857b995ebc9a" xlink:href="tixt-20231231.xsd#tixt_VestingOptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tixt_VestingOptionsAxis_fe87929b-f9f5-475f-92fa-c666241abbe2" xlink:to="loc_tixt_VestingOptionsDomain_a22406a7-3d20-4629-ab2a-857b995ebc9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedPaymentTrancheOneMember_592bd1c4-c6dc-4ab0-8dc1-ae2c42e97f12" xlink:href="tixt-20231231.xsd#tixt_ShareBasedPaymentTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_VestingOptionsDomain_a22406a7-3d20-4629-ab2a-857b995ebc9a" xlink:to="loc_tixt_ShareBasedPaymentTrancheOneMember_592bd1c4-c6dc-4ab0-8dc1-ae2c42e97f12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedPaymentTrancheTwoMember_8e258737-965e-47ab-bb5f-0aedbdf92003" xlink:href="tixt-20231231.xsd#tixt_ShareBasedPaymentTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_VestingOptionsDomain_a22406a7-3d20-4629-ab2a-857b995ebc9a" xlink:to="loc_tixt_ShareBasedPaymentTrancheTwoMember_8e258737-965e-47ab-bb5f-0aedbdf92003" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_f449f740-adda-4b3f-8f6f-29064a7be6b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:to="loc_ifrs-full_RangeAxis_f449f740-adda-4b3f-8f6f-29064a7be6b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_f449f740-adda-4b3f-8f6f-29064a7be6b0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_f449f740-adda-4b3f-8f6f-29064a7be6b0" xlink:to="loc_ifrs-full_RangesMember_f449f740-adda-4b3f-8f6f-29064a7be6b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_58683c5a-415d-4f64-94e8-3bc878acdd77" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_f449f740-adda-4b3f-8f6f-29064a7be6b0" xlink:to="loc_ifrs-full_RangesMember_58683c5a-415d-4f64-94e8-3bc878acdd77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_6ee3952f-8ad9-44d4-833a-4231b6fb451c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_58683c5a-415d-4f64-94e8-3bc878acdd77" xlink:to="loc_ifrs-full_BottomOfRangeMember_6ee3952f-8ad9-44d4-833a-4231b6fb451c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_10d52bbd-edad-4a72-8406-24586ac93034" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_58683c5a-415d-4f64-94e8-3bc878acdd77" xlink:to="loc_ifrs-full_TopOfRangeMember_10d52bbd-edad-4a72-8406-24586ac93034" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_3cca84b8-9d18-486c-8e80-f82db4692fd0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_e932a4be-0b94-4c3b-bb43-696fcf284fce" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_3cca84b8-9d18-486c-8e80-f82db4692fd0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_3cca84b8-9d18-486c-8e80-f82db4692fd0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_3cca84b8-9d18-486c-8e80-f82db4692fd0" xlink:to="loc_ifrs-full_EquityMember_3cca84b8-9d18-486c-8e80-f82db4692fd0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_69bc8ed4-6ddd-4cd8-8aab-1a20f7ff43cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_3cca84b8-9d18-486c-8e80-f82db4692fd0" xlink:to="loc_ifrs-full_EquityMember_69bc8ed4-6ddd-4cd8-8aab-1a20f7ff43cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TreasurySharesMember_9f4c27fd-5e99-4b18-9f69-998da90dce46" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TreasurySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_69bc8ed4-6ddd-4cd8-8aab-1a20f7ff43cc" xlink:to="loc_ifrs-full_TreasurySharesMember_9f4c27fd-5e99-4b18-9f69-998da90dce46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:href="tixt-20231231.xsd#tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOutstandingShareOptions_9047da90-c590-44d5-a27f-5b12c3b9803a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOutstandingShareOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:to="loc_ifrs-full_NumberOfOutstandingShareOptions_9047da90-c590-44d5-a27f-5b12c3b9803a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_6271fa19-d7d0-4831-9867-78def80a560a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_6271fa19-d7d0-4831-9867-78def80a560a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfShareOptionsVestedInShareBasedPaymentArrangement_8b49a0ed-bb9e-4823-bbac-f2abef0446f9" xlink:href="tixt-20231231.xsd#tixt_NumberOfShareOptionsVestedInShareBasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:to="loc_tixt_NumberOfShareOptionsVestedInShareBasedPaymentArrangement_8b49a0ed-bb9e-4823-bbac-f2abef0446f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_4d99cf70-e28b-44cd-8d10-c4660b843ca0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfSharesRollForward_e5dce332-d63d-4236-9fd7-2c118d54c258" xlink:to="loc_ifrs-full_NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement_4d99cf70-e28b-44cd-8d10-c4660b843ca0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfOutstandingShareOptions_72463f41-a819-41e6-a42d-8ee6b62890ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfOutstandingShareOptions"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVestedOutstandingShareOptions_c62d4e6b-0035-48aa-9f83-c9a72148ebb0" xlink:href="tixt-20231231.xsd#tixt_NumberOfVestedOutstandingShareOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:to="loc_tixt_NumberOfVestedOutstandingShareOptions_c62d4e6b-0035-48aa-9f83-c9a72148ebb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVestedShareOptionsVestedInShareBasedPaymentArrangement_bfb5cace-8746-4eb3-bc58-92eea461fac8" xlink:href="tixt-20231231.xsd#tixt_NumberOfVestedShareOptionsVestedInShareBasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:to="loc_tixt_NumberOfVestedShareOptionsVestedInShareBasedPaymentArrangement_bfb5cace-8746-4eb3-bc58-92eea461fac8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVestedShareOptionsExercisedInShareBasedPaymentArrangement_4c0a1c95-8011-4fd3-9307-600de1a5125f" xlink:href="tixt-20231231.xsd#tixt_NumberOfVestedShareOptionsExercisedInShareBasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:to="loc_tixt_NumberOfVestedShareOptionsExercisedInShareBasedPaymentArrangement_4c0a1c95-8011-4fd3-9307-600de1a5125f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVestedShareOptionsForfeitedInSharBasedPaymentArrangement_f6010134-4ca4-4041-a2d2-428ced5d2b2c" xlink:href="tixt-20231231.xsd#tixt_NumberOfVestedShareOptionsForfeitedInSharBasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:to="loc_tixt_NumberOfVestedShareOptionsForfeitedInSharBasedPaymentArrangement_f6010134-4ca4-4041-a2d2-428ced5d2b2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVestedOutstandingShareOptions_f8af4c6c-7ba7-4fe3-ab58-860ab5063fa0" xlink:href="tixt-20231231.xsd#tixt_NumberOfVestedOutstandingShareOptions"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_5ff222d3-2d48-4f38-be91-bba556853ea4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedNumberOfSharesRollForward_71ed29fc-cf35-437a-b295-bb4fc634fec3" xlink:to="loc_ifrs-full_NumberOfShareOptionsExercisableInSharebasedPaymentArrangement_5ff222d3-2d48-4f38-be91-bba556853ea4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_5182484d-416f-4ce9-af72-e0a876bf4278" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_5182484d-416f-4ce9-af72-e0a876bf4278" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_dbc811c7-39ce-435b-9fbc-24ee5b192d8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019_dbc811c7-39ce-435b-9fbc-24ee5b192d8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageExercisePriceOfOptionsVestedInShareBasedPaymentArrangement_9b6effba-3d7b-4281-90bc-83027466c840" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageExercisePriceOfOptionsVestedInShareBasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_tixt_WeightedAverageExercisePriceOfOptionsVestedInShareBasedPaymentArrangement_9b6effba-3d7b-4281-90bc-83027466c840" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_00e5d0ad-bffa-4c19-a529-a9505aa8532b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement2019_00e5d0ad-bffa-4c19-a529-a9505aa8532b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod_02827643-4cec-4d64-9f1f-50438f416d5c" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsForfeitedAndCancelledInPeriod_02827643-4cec-4d64-9f1f-50438f416d5c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019_1515fd6f-c80e-42f7-8af9-37795e91055e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement2019"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_673c9eb7-ccef-4de7-aaa0-6e62b61804f8" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_673c9eb7-ccef-4de7-aaa0-6e62b61804f8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019_2feaada9-0c98-4a1d-815f-1a117abddf4a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageExercisePriceAbstract_b9178e6d-b000-4b91-957c-9696c9f87bcf" xlink:to="loc_ifrs-full_WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement2019_2feaada9-0c98-4a1d-815f-1a117abddf4a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_0dca7d2d-7e6b-499a-b65e-7f03c2f8c795" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_NumberOfSharesIssued_0dca7d2d-7e6b-499a-b65e-7f03c2f8c795" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_b67af435-27e5-4ac4-b9a9-92f710f8854e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_ExpenseFromCashsettledSharebasedPaymentTransactionsInWhichGoodsOrServicesReceivedDidNotQualifyForRecognitionAsAssets_b67af435-27e5-4ac4-b9a9-92f710f8854e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_AccruedAndPaidExpenseFromCashSettledShareBasedPaymentTransactions_3da837b7-8ad7-4ba3-92a5-f137c620a02b" xlink:href="tixt-20231231.xsd#tixt_AccruedAndPaidExpenseFromCashSettledShareBasedPaymentTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_tixt_AccruedAndPaidExpenseFromCashSettledShareBasedPaymentTransactions_3da837b7-8ad7-4ba3-92a5-f137c620a02b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_3d58e14a-a904-451a-b1fa-12df23d27d8a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_LiabilitiesFromSharebasedPaymentTransactions2011_3d58e14a-a904-451a-b1fa-12df23d27d8a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_9ddad560-2388-4e99-9d2b-f4529eaa8acc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ExercisePriceOfOutstandingShareOptions2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_ExercisePriceOfOutstandingShareOptions2019_9ddad560-2388-4e99-9d2b-f4529eaa8acc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_c593ba93-b871-4bb5-9693-d9fca8379a2d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_621c2d10-4208-47bc-b1d8-e32474225af3" xlink:to="loc_ifrs-full_WeightedAverageRemainingContractualLifeOfOutstandingShareOptions2019_c593ba93-b871-4bb5-9693-d9fca8379a2d" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharebasedcompensationOtherDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharebasedcompensationOtherDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharebasedcompensationOtherDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_364052da-0244-433d-abbc-545327345adc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:to="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_364052da-0244-433d-abbc-545327345adc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_18eeac42-094b-48d6-9584-db22722a19d7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_364052da-0244-433d-abbc-545327345adc" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_18eeac42-094b-48d6-9584-db22722a19d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_18eeac42-094b-48d6-9584-db22722a19d7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_18eeac42-094b-48d6-9584-db22722a19d7" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_18eeac42-094b-48d6-9584-db22722a19d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnitAppreciationRightsMember_cbc47380-8176-434a-9f53-4342ee0e70e0" xlink:href="tixt-20231231.xsd#tixt_UnitAppreciationRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_18eeac42-094b-48d6-9584-db22722a19d7" xlink:to="loc_tixt_UnitAppreciationRightsMember_cbc47380-8176-434a-9f53-4342ee0e70e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_ebfba517-db68-44f6-a649-44c228e712fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_364052da-0244-433d-abbc-545327345adc" xlink:to="loc_ifrs-full_RangeAxis_ebfba517-db68-44f6-a649-44c228e712fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_ebfba517-db68-44f6-a649-44c228e712fe_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_ebfba517-db68-44f6-a649-44c228e712fe" xlink:to="loc_ifrs-full_RangesMember_ebfba517-db68-44f6-a649-44c228e712fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_987b52b0-dce9-4f65-8c17-3cca4d8de416" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_ebfba517-db68-44f6-a649-44c228e712fe" xlink:to="loc_ifrs-full_RangesMember_987b52b0-dce9-4f65-8c17-3cca4d8de416" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_fbbe0937-93dc-4747-9b08-a32174cad02d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_987b52b0-dce9-4f65-8c17-3cca4d8de416" xlink:to="loc_ifrs-full_TopOfRangeMember_fbbe0937-93dc-4747-9b08-a32174cad02d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_71e3156d-72ee-467d-93c2-84f5a88951ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable_364052da-0244-433d-abbc-545327345adc" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_71e3156d-72ee-467d-93c2-84f5a88951ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_71e3156d-72ee-467d-93c2-84f5a88951ef_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_71e3156d-72ee-467d-93c2-84f5a88951ef" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_71e3156d-72ee-467d-93c2-84f5a88951ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_b668dfed-cf9a-4a61-8a70-5df7d1d7b134" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_71e3156d-72ee-467d-93c2-84f5a88951ef" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_b668dfed-cf9a-4a61-8a70-5df7d1d7b134" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WillowTreeMember_06468575-5b36-4046-981f-ba657ebcad02" xlink:href="tixt-20231231.xsd#tixt_WillowTreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_b668dfed-cf9a-4a61-8a70-5df7d1d7b134" xlink:to="loc_tixt_WillowTreeMember_06468575-5b36-4046-981f-ba657ebcad02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_92b15ef6-63cd-4d36-a620-bb0f05167ab7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_b668dfed-cf9a-4a61-8a70-5df7d1d7b134" xlink:to="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_92b15ef6-63cd-4d36-a620-bb0f05167ab7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnitAppreciationRightsGrantedValue_5d9161d4-67cc-4237-9da7-b1a335aa5a89" xlink:href="tixt-20231231.xsd#tixt_UnitAppreciationRightsGrantedValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:to="loc_tixt_UnitAppreciationRightsGrantedValue_5d9161d4-67cc-4237-9da7-b1a335aa5a89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_FutureExercisePeriod_2086cbad-2601-4bf2-9bd8-7a9af36e8147" xlink:href="tixt-20231231.xsd#tixt_FutureExercisePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:to="loc_tixt_FutureExercisePeriod_2086cbad-2601-4bf2-9bd8-7a9af36e8147" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessesAcquiredNumber_cd8bef58-2a70-4d0c-b45b-54529f23bcb1" xlink:href="tixt-20231231.xsd#tixt_BusinessesAcquiredNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:to="loc_tixt_BusinessesAcquiredNumber_cd8bef58-2a70-4d0c-b45b-54529f23bcb1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid_ade8fb37-ffb6-4ddc-87f0-d8d7635c27eb" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems_45bb100c-0b00-4728-85f1-99c2f29482f6" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid_ade8fb37-ffb6-4ddc-87f0-d8d7635c27eb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/IncometaxesTemporarydifferencesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#IncometaxesTemporarydifferencesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/IncometaxesTemporarydifferencesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0c149738-f262-4cee-b934-bb4b0339c666" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_991400f6-3fab-47fe-9e89-5d879e739c06" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0c149738-f262-4cee-b934-bb4b0339c666" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_991400f6-3fab-47fe-9e89-5d879e739c06" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_d2eadbbe-81cd-4c86-9204-262a6a17aec8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_991400f6-3fab-47fe-9e89-5d879e739c06" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_d2eadbbe-81cd-4c86-9204-262a6a17aec8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_d2eadbbe-81cd-4c86-9204-262a6a17aec8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_d2eadbbe-81cd-4c86-9204-262a6a17aec8" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_d2eadbbe-81cd-4c86-9204-262a6a17aec8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_d2eadbbe-81cd-4c86-9204-262a6a17aec8" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PropertyPlantAndEquipmentOwnedAndIntangibleAssetsSubjectToAmortizationMember_54405f72-1ddc-4870-b985-691be4f62c21" xlink:href="tixt-20231231.xsd#tixt_PropertyPlantAndEquipmentOwnedAndIntangibleAssetsSubjectToAmortizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_PropertyPlantAndEquipmentOwnedAndIntangibleAssetsSubjectToAmortizationMember_54405f72-1ddc-4870-b985-691be4f62c21" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NetPensionAndSharebasedCompensationAmountsMember_b499bf83-65a5-4e52-9263-c4ceb63bc12a" xlink:href="tixt-20231231.xsd#tixt_NetPensionAndSharebasedCompensationAmountsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_NetPensionAndSharebasedCompensationAmountsMember_b499bf83-65a5-4e52-9263-c4ceb63bc12a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TemporaryDifferencesFromDebtAndEquityIssueCostMember_71b2d38c-ff0e-45b5-a531-5afe9d524d18" xlink:href="tixt-20231231.xsd#tixt_TemporaryDifferencesFromDebtAndEquityIssueCostMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_TemporaryDifferencesFromDebtAndEquityIssueCostMember_71b2d38c-ff0e-45b5-a531-5afe9d524d18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TemporaryDifferencesFromProvisionsAndOtherMember_35c4109f-f99c-4bb5-808e-5aa09d851a88" xlink:href="tixt-20231231.xsd#tixt_TemporaryDifferencesFromProvisionsAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_TemporaryDifferencesFromProvisionsAndOtherMember_35c4109f-f99c-4bb5-808e-5aa09d851a88" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TemporaryDifferencesFromNonCapitalLossCarriedForwardMember_9ec893b4-9d0a-487f-a4f0-4a440f371fca" xlink:href="tixt-20231231.xsd#tixt_TemporaryDifferencesFromNonCapitalLossCarriedForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_TemporaryDifferencesFromNonCapitalLossCarriedForwardMember_9ec893b4-9d0a-487f-a4f0-4a440f371fca" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TemporaryDifferencesFromLeasesMember_2da2cdd3-b2d8-4308-ae55-8aebdbf69374" xlink:href="tixt-20231231.xsd#tixt_TemporaryDifferencesFromLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_tixt_TemporaryDifferencesFromLeasesMember_2da2cdd3-b2d8-4308-ae55-8aebdbf69374" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnusedTaxLossesMember_4f388905-3202-4027-8720-0c1fddb78b41" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UnusedTaxLossesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_f9c2e01f-9489-4eac-ab1c-7d2d39e85cd6" xlink:to="loc_ifrs-full_UnusedTaxLossesMember_4f388905-3202-4027-8720-0c1fddb78b41" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_0c149738-f262-4cee-b934-bb4b0339c666" xlink:to="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_44bb975c-4b5f-4228-91f1-357f6a54b711" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:to="loc_ifrs-full_DeferredTaxLiabilityAsset_44bb975c-4b5f-4228-91f1-357f6a54b711" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_fb2a1af5-f603-4245-a39c-43594ac4a375" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:to="loc_ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss_fb2a1af5-f603-4245-a39c-43594ac4a375" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_693f5f9e-5fce-4b9a-8246-e73cad02d68a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:to="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_693f5f9e-5fce-4b9a-8246-e73cad02d68a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset_9dd1ab58-e8d9-4173-85d3-ad78d73cf01d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesDeferredTaxLiabilityAsset_9dd1ab58-e8d9-4173-85d3-ad78d73cf01d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_00fd936b-b080-431b-81b3-36c81edffdb0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseInDeferredTaxLiabilityAsset_614c5d8e-ad67-4613-ba96-99f929bff245" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseInDeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInDeferredTaxLiabilityAssetAbstract_7b517465-2c96-4b34-af50-2d2139c1abb8" xlink:to="loc_ifrs-full_IncreaseDecreaseInDeferredTaxLiabilityAsset_614c5d8e-ad67-4613-ba96-99f929bff245" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/IncometaxesOtherDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#IncometaxesOtherDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/IncometaxesOtherDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_d4700c1a-3e84-4d36-ac49-3a86f0214d68" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_d4700c1a-3e84-4d36-ac49-3a86f0214d68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CarryforwardPeriodAxis_e12b2f03-05f2-4f63-9221-533b6753c27c" xlink:href="tixt-20231231.xsd#tixt_CarryforwardPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_d4700c1a-3e84-4d36-ac49-3a86f0214d68" xlink:to="loc_tixt_CarryforwardPeriodAxis_e12b2f03-05f2-4f63-9221-533b6753c27c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CarryforwardPeriodDomain_e12b2f03-05f2-4f63-9221-533b6753c27c_default" xlink:href="tixt-20231231.xsd#tixt_CarryforwardPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tixt_CarryforwardPeriodAxis_e12b2f03-05f2-4f63-9221-533b6753c27c" xlink:to="loc_tixt_CarryforwardPeriodDomain_e12b2f03-05f2-4f63-9221-533b6753c27c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CarryforwardPeriodDomain_5db9daea-d28d-493a-8bc3-f6d5960f5778" xlink:href="tixt-20231231.xsd#tixt_CarryforwardPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tixt_CarryforwardPeriodAxis_e12b2f03-05f2-4f63-9221-533b6753c27c" xlink:to="loc_tixt_CarryforwardPeriodDomain_5db9daea-d28d-493a-8bc3-f6d5960f5778" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IndefiniteMember_280c98ef-39be-42f0-8c3b-0b6b6bb4b187" xlink:href="tixt-20231231.xsd#tixt_IndefiniteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CarryforwardPeriodDomain_5db9daea-d28d-493a-8bc3-f6d5960f5778" xlink:to="loc_tixt_IndefiniteMember_280c98ef-39be-42f0-8c3b-0b6b6bb4b187" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_A20YearsMember_65a01606-0976-4664-ac01-64e6fd2a637d" xlink:href="tixt-20231231.xsd#tixt_A20YearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CarryforwardPeriodDomain_5db9daea-d28d-493a-8bc3-f6d5960f5778" xlink:to="loc_tixt_A20YearsMember_65a01606-0976-4664-ac01-64e6fd2a637d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_A5YearsMember_eb9227c5-1c9b-4387-9741-796a660682e2" xlink:href="tixt-20231231.xsd#tixt_A5YearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CarryforwardPeriodDomain_5db9daea-d28d-493a-8bc3-f6d5960f5778" xlink:to="loc_tixt_A5YearsMember_eb9227c5-1c9b-4387-9741-796a660682e2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsTable_d4700c1a-3e84-4d36-ac49-3a86f0214d68" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_b40a3f89-41d0-4c8c-ae11-3fad288ce50a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsAxis_8cdb260d-21fc-4e1d-9eea-5e53ee8d4842" xlink:to="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_b40a3f89-41d0-4c8c-ae11-3fad288ce50a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnusedTaxLossesDependentOnFutureEarningsMember_6aa16a5b-787d-4a1f-8101-d9490542cf90" xlink:href="tixt-20231231.xsd#tixt_UnusedTaxLossesDependentOnFutureEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsMember_b40a3f89-41d0-4c8c-ae11-3fad288ce50a" xlink:to="loc_tixt_UnusedTaxLossesDependentOnFutureEarningsMember_6aa16a5b-787d-4a1f-8101-d9490542cf90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_3567c606-2f2b-4d24-abc7-6e14e11f4f8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised_3567c606-2f2b-4d24-abc7-6e14e11f4f8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilityAsset_594ee207-a8c2-4250-993a-83188a9d6bec" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxLiabilityAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_ifrs-full_DeferredTaxLiabilityAsset_594ee207-a8c2-4250-993a-83188a9d6bec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognizedCarryforwardPeriod_f3cce1ff-d1ed-4ae3-bbde-1924f424ad88" xlink:href="tixt-20231231.xsd#tixt_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognizedCarryforwardPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_tixt_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognizedCarryforwardPeriod_f3cce1ff-d1ed-4ae3-bbde-1924f424ad88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceCurrentTaxExpense_5915b0b6-b897-4340-834c-fd3c7546df00" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceCurrentTaxExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_ifrs-full_TaxBenefitArisingFromPreviouslyUnrecognisedTaxLossTaxCreditOrTemporaryDifferenceOfPriorPeriodUsedToReduceCurrentTaxExpense_5915b0b6-b897-4340-834c-fd3c7546df00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxAssets_0e7cf964-dd78-43dc-8a9c-842d18667740" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTemporaryDifferenceUnusedTaxLossesAndUnusedTaxCreditsLineItems_b84299a4-030e-44c2-94d1-eaddd5449546" xlink:to="loc_ifrs-full_DeferredTaxAssets_0e7cf964-dd78-43dc-8a9c-842d18667740" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/OthercomprehensiveincomeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#OthercomprehensiveincomeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/OthercomprehensiveincomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable_115ef5a3-9a3f-4135-801e-d976206b85a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable_115ef5a3-9a3f-4135-801e-d976206b85a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_623c7a9d-a572-4224-bdcf-083c26346a88" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemTable_115ef5a3-9a3f-4135-801e-d976206b85a3" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_623c7a9d-a572-4224-bdcf-083c26346a88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_623c7a9d-a572-4224-bdcf-083c26346a88_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_623c7a9d-a572-4224-bdcf-083c26346a88" xlink:to="loc_ifrs-full_EquityMember_623c7a9d-a572-4224-bdcf-083c26346a88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_cb45c10a-c6fe-4391-982f-1bf8664c3a4b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_623c7a9d-a572-4224-bdcf-083c26346a88" xlink:to="loc_ifrs-full_EquityMember_cb45c10a-c6fe-4391-982f-1bf8664c3a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_0353c7df-c8eb-4001-af7c-57fb64291348" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_cb45c10a-c6fe-4391-982f-1bf8664c3a4b" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncomeMember_0353c7df-c8eb-4001-af7c-57fb64291348" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract_bf7348a7-a4de-44e3-8f35-93dd48b6aa31" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract_bf7348a7-a4de-44e3-8f35-93dd48b6aa31" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:href="tixt-20231231.xsd#tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract_bf7348a7-a4de-44e3-8f35-93dd48b6aa31" xlink:to="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfCashFlowHedges_cfce5308-1af1-4621-9051-ff43ea9232c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfCashFlowHedges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:to="loc_ifrs-full_ReserveOfCashFlowHedges_cfce5308-1af1-4621-9051-ff43ea9232c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_1bf348f0-e5a6-4d45-810d-099311f03809" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxCashFlowHedges_1bf348f0-e5a6-4d45-810d-099311f03809" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_fbb8136a-5ca6-4f3a-8e91-91c7452e9cb7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxCashFlowHedges_fbb8136a-5ca6-4f3a-8e91-91c7452e9cb7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome_5a77c731-5d76-4c14-97cf-b1c9e0cfed3e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_ChangeInUnrealizedFairValueOfDerivativesAbstract_85977c8f-502a-479e-818e-94d544e577a6" xlink:to="loc_ifrs-full_IncomeTaxRelatingToCashFlowHedgesOfOtherComprehensiveIncome_5a77c731-5d76-4c14-97cf-b1c9e0cfed3e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfCashFlowHedges_fe217a0a-a4ac-4ef1-942e-c9d171788d5b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfCashFlowHedges"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:href="tixt-20231231.xsd#tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossBeforeTaxAbstract_bf7348a7-a4de-44e3-8f35-93dd48b6aa31" xlink:to="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslation_b7ae36a6-a429-4a8f-ab04-1788466f12b8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:to="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslation_b7ae36a6-a429-4a8f-ab04-1788466f12b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation_f544946d-a828-4aed-a3f2-233d3f785ec8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation_f544946d-a828-4aed-a3f2-233d3f785ec8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_4e8e0b60-9624-47cd-8cd8-8245a3360b92" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation_4e8e0b60-9624-47cd-8cd8-8245a3360b92" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome_63fa4162-923e-4be1-aadb-d3a40eb99539" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CumulativeForeignCurrencyTranslationAdjustmentAbstract_3e444b58-5278-47dc-996a-6f1f44c7bbad" xlink:to="loc_ifrs-full_IncomeTaxRelatingToExchangeDifferencesOnTranslationOfOtherComprehensiveIncome_63fa4162-923e-4be1-aadb-d3a40eb99539" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfExchangeDifferencesOnTranslation_60a338d9-2c4f-496e-a2d4-117891086455" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfExchangeDifferencesOnTranslation"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract_d99b30f1-a5e5-49fd-be1d-4710dc29a19d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract_d99b30f1-a5e5-49fd-be1d-4710dc29a19d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:href="tixt-20231231.xsd#tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTaxAbstract_d99b30f1-a5e5-49fd-be1d-4710dc29a19d" xlink:to="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlans_5c3ba06e-149c-490c-b567-8221dbfe1d6d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:to="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlans_5c3ba06e-149c-490c-b567-8221dbfe1d6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_a030cf88-9719-442b-bad0-297cc663ae64" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_a030cf88-9719-442b-bad0-297cc663ae64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome_8d0fbd1b-6888-445f-9e6a-549645109254" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:to="loc_ifrs-full_IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome_8d0fbd1b-6888-445f-9e6a-549645109254" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_5f727e1b-5be4-4209-b600-b99bc1a9e34d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_EmployeeDefinedBenefitPlanReMeasurementsAbstract_6cb748f5-7367-4090-9662-8cbc02f6ae7c" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeNetOfTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans_5f727e1b-5be4-4209-b600-b99bc1a9e34d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlans_7c7ab7df-d011-4dd5-8c62-34cc2ac900e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReserveOfRemeasurementsOfDefinedBenefitPlans"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncome_cc958ec5-2191-4f42-b9a1-e9e8ddf172b5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_AccumulatedOtherComprehensiveIncome_cc958ec5-2191-4f42-b9a1-e9e8ddf172b5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncomeBeforeTax_156b7ef8-cef1-46eb-b4e6-cbb7f4189ee9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncomeBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_OtherComprehensiveIncomeBeforeTax_156b7ef8-cef1-46eb-b4e6-cbb7f4189ee9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_c92856e8-74db-432e-a9cc-4c8c479cae61" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_IncomeTaxRelatingToComponentsOfOtherComprehensiveIncome_c92856e8-74db-432e-a9cc-4c8c479cae61" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherComprehensiveIncome_be306659-abd4-4a22-9878-614bff5a45f4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems_225b0ff4-9da7-426c-b9e2-e00f8641a817" xlink:to="loc_ifrs-full_OtherComprehensiveIncome_be306659-abd4-4a22-9878-614bff5a45f4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedOtherComprehensiveIncome_fee41efc-316e-4d60-904f-57a9e7e8145d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedOtherComprehensiveIncome"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/AccountsreceivableAgeAnalysisofAccountsReceivableDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#AccountsreceivableAgeAnalysisofAccountsReceivableDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/AccountsreceivableAgeAnalysisofAccountsReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_abfad260-fa41-47f3-952b-3946a7f3626d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_abfad260-fa41-47f3-952b-3946a7f3626d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PastBillingDateStatusAxis_f48cc041-7621-413b-9443-27b4b0065f89" xlink:href="tixt-20231231.xsd#tixt_PastBillingDateStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_abfad260-fa41-47f3-952b-3946a7f3626d" xlink:to="loc_tixt_PastBillingDateStatusAxis_f48cc041-7621-413b-9443-27b4b0065f89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PastBillingDateStatusDomain_f48cc041-7621-413b-9443-27b4b0065f89_default" xlink:href="tixt-20231231.xsd#tixt_PastBillingDateStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_tixt_PastBillingDateStatusAxis_f48cc041-7621-413b-9443-27b4b0065f89" xlink:to="loc_tixt_PastBillingDateStatusDomain_f48cc041-7621-413b-9443-27b4b0065f89_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:href="tixt-20231231.xsd#tixt_PastBillingDateStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_tixt_PastBillingDateStatusAxis_f48cc041-7621-413b-9443-27b4b0065f89" xlink:to="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LessThan30DaysMember_5ec2430f-22cd-4568-88a1-586f8e87a454" xlink:href="tixt-20231231.xsd#tixt_LessThan30DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:to="loc_tixt_LessThan30DaysMember_5ec2430f-22cd-4568-88a1-586f8e87a454" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_A3060DaysMember_d51d7ed5-c29b-4c5d-83fd-f62521c7b997" xlink:href="tixt-20231231.xsd#tixt_A3060DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:to="loc_tixt_A3060DaysMember_d51d7ed5-c29b-4c5d-83fd-f62521c7b997" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_A6190DaysMember_9d7a4c36-cf3b-4bd7-a0b2-00a8d4622d97" xlink:href="tixt-20231231.xsd#tixt_A6190DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:to="loc_tixt_A6190DaysMember_9d7a4c36-cf3b-4bd7-a0b2-00a8d4622d97" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MoreThan90DaysMember_db2e8159-dcde-4bc0-844f-e81e0a9cad5f" xlink:href="tixt-20231231.xsd#tixt_MoreThan90DaysMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_PastBillingDateStatusDomain_85a4b40b-d05d-488e-9f78-b65335d4decc" xlink:to="loc_tixt_MoreThan90DaysMember_db2e8159-dcde-4bc0-844f-e81e0a9cad5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrentTradeReceivablesBilled_a1c9cb95-d79c-4716-abb5-a4d776bbd23c" xlink:href="tixt-20231231.xsd#tixt_CurrentTradeReceivablesBilled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:to="loc_tixt_CurrentTradeReceivablesBilled_a1c9cb95-d79c-4716-abb5-a4d776bbd23c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrentGrossTradeReceivablesUnbilled_d87adb12-1ec9-4d87-b3d6-e12234216889" xlink:href="tixt-20231231.xsd#tixt_CurrentGrossTradeReceivablesUnbilled"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:to="loc_tixt_CurrentGrossTradeReceivablesUnbilled_d87adb12-1ec9-4d87-b3d6-e12234216889" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherCurrentReceivables_68c00249-7f2f-4eb3-8298-1f684ccbd65e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:to="loc_ifrs-full_OtherCurrentReceivables_68c00249-7f2f-4eb3-8298-1f684ccbd65e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivables_56688e07-b8ef-480a-b64b-2638e62a3419" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TradeAndOtherCurrentReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_f3536fbd-9c71-41c3-9a36-75650360e901" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivables_56688e07-b8ef-480a-b64b-2638e62a3419" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksCreditriskDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#FinancialinstrumentsandmanagementoffinancialrisksCreditriskDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksCreditriskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_fa653f2d-8b57-44fa-af0a-16d02e9d2e27" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialAssetsTable_fd224216-478c-4428-8ab4-5cafebb4b19d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_fa653f2d-8b57-44fa-af0a-16d02e9d2e27" xlink:to="loc_ifrs-full_DisclosureOfFinancialAssetsTable_fd224216-478c-4428-8ab4-5cafebb4b19d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialAssetsAxis_c536a0b8-323a-4cdd-82f3-1f56498bc7cb" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsTable_fd224216-478c-4428-8ab4-5cafebb4b19d" xlink:to="loc_ifrs-full_ClassesOfFinancialAssetsAxis_c536a0b8-323a-4cdd-82f3-1f56498bc7cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsMember_c536a0b8-323a-4cdd-82f3-1f56498bc7cb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_c536a0b8-323a-4cdd-82f3-1f56498bc7cb" xlink:to="loc_ifrs-full_FinancialAssetsMember_c536a0b8-323a-4cdd-82f3-1f56498bc7cb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialAssetsAxis_c536a0b8-323a-4cdd-82f3-1f56498bc7cb" xlink:to="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CashAndTemporaryInvestmentsNetMember_ca6ba13f-ca84-4f3f-9d45-a31d830b1ead" xlink:href="tixt-20231231.xsd#tixt_CashAndTemporaryInvestmentsNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:to="loc_tixt_CashAndTemporaryInvestmentsNetMember_ca6ba13f-ca84-4f3f-9d45-a31d830b1ead" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeReceivablesMember_67d07241-4b89-4391-abbd-10e4beac75f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TradeReceivablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:to="loc_ifrs-full_TradeReceivablesMember_67d07241-4b89-4391-abbd-10e4beac75f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TradeAndOtherReceivablesFromRelatedPartiesMember_ad659a57-5a80-4c94-878c-8c0d1e477d8b" xlink:href="tixt-20231231.xsd#tixt_TradeAndOtherReceivablesFromRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:to="loc_tixt_TradeAndOtherReceivablesFromRelatedPartiesMember_ad659a57-5a80-4c94-878c-8c0d1e477d8b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_f4c48c6e-ddc4-4d6a-9d50-803db664e617" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialAssetsMember_1fc4940f-dbaf-4174-b535-d585b53da5c2" xlink:to="loc_ifrs-full_DerivativesMember_f4c48c6e-ddc4-4d6a-9d50-803db664e617" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaximumExposureToCreditRisk_09f0209a-226b-406d-83e6-54bbbea84763" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MaximumExposureToCreditRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialAssetsLineItems_fa653f2d-8b57-44fa-af0a-16d02e9d2e27" xlink:to="loc_ifrs-full_MaximumExposureToCreditRisk_09f0209a-226b-406d-83e6-54bbbea84763" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksLiquidityriskDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#FinancialinstrumentsandmanagementoffinancialrisksLiquidityriskDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksLiquidityriskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable_051f03e2-2b30-4984-8904-8dc3df03dc7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialLiabilitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:to="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable_051f03e2-2b30-4984-8904-8dc3df03dc7c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_40461d21-db3c-4f9c-980e-86e1c310dcae" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable_051f03e2-2b30-4984-8904-8dc3df03dc7c" xlink:to="loc_ifrs-full_TypesOfRisksAxis_40461d21-db3c-4f9c-980e-86e1c310dcae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_40461d21-db3c-4f9c-980e-86e1c310dcae_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_40461d21-db3c-4f9c-980e-86e1c310dcae" xlink:to="loc_ifrs-full_TypesOfRisksMember_40461d21-db3c-4f9c-980e-86e1c310dcae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_3777c535-d4f2-4fe2-90f8-dd4167203665" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_40461d21-db3c-4f9c-980e-86e1c310dcae" xlink:to="loc_ifrs-full_TypesOfRisksMember_3777c535-d4f2-4fe2-90f8-dd4167203665" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrencyRiskForeignCurrencyTransactionsMember_5508ae8f-e04b-4e0d-94df-eb9efbedb3e2" xlink:href="tixt-20231231.xsd#tixt_CurrencyRiskForeignCurrencyTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_3777c535-d4f2-4fe2-90f8-dd4167203665" xlink:to="loc_tixt_CurrencyRiskForeignCurrencyTransactionsMember_5508ae8f-e04b-4e0d-94df-eb9efbedb3e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_8bb7de0c-c489-47d2-b588-6f770b31970d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable_051f03e2-2b30-4984-8904-8dc3df03dc7c" xlink:to="loc_ifrs-full_MaturityAxis_8bb7de0c-c489-47d2-b588-6f770b31970d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_8bb7de0c-c489-47d2-b588-6f770b31970d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_8bb7de0c-c489-47d2-b588-6f770b31970d" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_8bb7de0c-c489-47d2-b588-6f770b31970d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_8bb7de0c-c489-47d2-b588-6f770b31970d" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_032f78dd-e259-487c-aafb-02ea05ba2219" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_032f78dd-e259-487c-aafb-02ea05ba2219" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_9ac429ec-476f-4af1-9976-850d82eec654" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_9ac429ec-476f-4af1-9976-850d82eec654" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_095999a1-21f2-4f2f-bf21-c543a39850fe" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_095999a1-21f2-4f2f-bf21-c543a39850fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_cd0a2c0c-1bbb-4632-b650-e4c7f1337478" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_cd0a2c0c-1bbb-4632-b650-e4c7f1337478" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_8eb0b787-f2d9-464b-a4d5-873220b81918" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_8eb0b787-f2d9-464b-a4d5-873220b81918" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFiveYearsMember_5732f546-fcce-4b9c-b162-506f25601272" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0dd3b241-6607-45e6-9a2e-3ada07783e31" xlink:to="loc_ifrs-full_LaterThanFiveYearsMember_5732f546-fcce-4b9c-b162-506f25601272" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_ff630db1-425d-4cc1-bfa6-7e13edaf1379" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesTable_051f03e2-2b30-4984-8904-8dc3df03dc7c" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_ff630db1-425d-4cc1-bfa6-7e13edaf1379" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember_ff630db1-425d-4cc1-bfa6-7e13edaf1379_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_ff630db1-425d-4cc1-bfa6-7e13edaf1379" xlink:to="loc_ifrs-full_FinancialLiabilitiesMember_ff630db1-425d-4cc1-bfa6-7e13edaf1379_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_ff630db1-425d-4cc1-bfa6-7e13edaf1379" xlink:to="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NonInterestBearingFinancialLiabilitiesMember_9ff30f6b-d191-46f2-8062-c7b248e614cd" xlink:href="tixt-20231231.xsd#tixt_NonInterestBearingFinancialLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_tixt_NonInterestBearingFinancialLiabilitiesMember_9ff30f6b-d191-46f2-8062-c7b248e614cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TradeAndOtherPayablesToRelatedPartiesMember_7731533d-6450-46b4-8545-1c64b995375e" xlink:href="tixt-20231231.xsd#tixt_TradeAndOtherPayablesToRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_tixt_TradeAndOtherPayablesToRelatedPartiesMember_7731533d-6450-46b4-8545-1c64b995375e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LongTermBorrowingsExcludingLeasesMember_1e49cbf7-2516-4ce0-b8e5-dcd92c9458b9" xlink:href="tixt-20231231.xsd#tixt_LongTermBorrowingsExcludingLeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_tixt_LongTermBorrowingsExcludingLeasesMember_1e49cbf7-2516-4ce0-b8e5-dcd92c9458b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LeasesMember_de5dc4c7-2a90-43e9-998a-83f48592ad8a" xlink:href="tixt-20231231.xsd#tixt_LeasesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_tixt_LeasesMember_de5dc4c7-2a90-43e9-998a-83f48592ad8a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrencySwapContractMember_59e97d9d-450f-4414-8635-e461fe2e86e4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrencySwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_ifrs-full_CurrencySwapContractMember_59e97d9d-450f-4414-8635-e461fe2e86e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateSwapContractMember_c348ecf5-439b-4eee-995b-cbadfb6e914f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_InterestRateSwapContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_cf6af303-53c2-4b50-9b08-11ccd3faebde" xlink:to="loc_ifrs-full_InterestRateSwapContractMember_c348ecf5-439b-4eee-995b-cbadfb6e914f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows_099d1aed-5978-4466-8cb4-c1c9581a62c6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:to="loc_ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows_099d1aed-5978-4466-8cb4-c1c9581a62c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchangedDerivativeReceive_5a4e4121-f4b6-4ce8-b051-7c8d5f8b40fe" xlink:href="tixt-20231231.xsd#tixt_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchangedDerivativeReceive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:to="loc_tixt_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchangedDerivativeReceive_5a4e4121-f4b6-4ce8-b051-7c8d5f8b40fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchanged_3fb3133e-7fed-4b86-9656-e61f19993ce5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchanged"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:to="loc_ifrs-full_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchanged_3fb3133e-7fed-4b86-9656-e61f19993ce5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchanged_4c53cf7a-e48e-4aad-b5f9-62696ed49744" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ContractualAmountsToBeExchangedInDerivativeFinancialInstrumentForWhichGrossCashFlowsAreExchanged"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NonderivativeAndDerivativeFinancialLiabilitiesUndiscountedCashFlows_b7f90fdf-1f7b-4e56-b91d-9bdd5268f0e9" xlink:href="tixt-20231231.xsd#tixt_NonderivativeAndDerivativeFinancialLiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialLiabilitiesLineItems_96eb2105-03ea-4f8b-bccb-75e2ece89eae" xlink:to="loc_tixt_NonderivativeAndDerivativeFinancialLiabilitiesUndiscountedCashFlows_b7f90fdf-1f7b-4e56-b91d-9bdd5268f0e9" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksMarketriskDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#FinancialinstrumentsandmanagementoffinancialrisksMarketriskDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksMarketriskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9074769b-eabc-4d35-a21e-d278a4cd6e5c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9074769b-eabc-4d35-a21e-d278a4cd6e5c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComponentsOfEquityAxis_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComponentsOfEquityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9074769b-eabc-4d35-a21e-d278a4cd6e5c" xlink:to="loc_ifrs-full_ComponentsOfEquityAxis_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9" xlink:to="loc_ifrs-full_EquityMember_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityMember_1f7dd6af-104f-4eb4-9cca-fa5127c346bc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ComponentsOfEquityAxis_27bdcf0c-9a3b-4bfd-ae5c-c74a7a7eb3c9" xlink:to="loc_ifrs-full_EquityMember_1f7dd6af-104f-4eb4-9cca-fa5127c346bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IssuedCapitalMember_1ea216dc-52b5-41ea-843f-79b15c03719e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IssuedCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EquityMember_1f7dd6af-104f-4eb4-9cca-fa5127c346bc" xlink:to="loc_ifrs-full_IssuedCapitalMember_1ea216dc-52b5-41ea-843f-79b15c03719e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_3cf4a324-3d2b-4466-b20a-64e87f229209" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9074769b-eabc-4d35-a21e-d278a4cd6e5c" xlink:to="loc_srt_CurrencyAxis_3cf4a324-3d2b-4466-b20a-64e87f229209" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_3cf4a324-3d2b-4466-b20a-64e87f229209_default" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_3cf4a324-3d2b-4466-b20a-64e87f229209" xlink:to="loc_currency_AllCurrenciesDomain_3cf4a324-3d2b-4466-b20a-64e87f229209_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_3cf4a324-3d2b-4466-b20a-64e87f229209" xlink:to="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_c5c77181-89f1-4545-ba12-3ed5e30d2cca" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:to="loc_currency_EUR_c5c77181-89f1-4545-ba12-3ed5e30d2cca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhilippinePesoMember_4a20592c-4b55-42b4-8577-686baf2e071e" xlink:href="tixt-20231231.xsd#tixt_PhilippinePesoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:to="loc_tixt_PhilippinePesoMember_4a20592c-4b55-42b4-8577-686baf2e071e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CAD_90d27916-c520-4316-b3ea-ceba49223d37" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_CAD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:to="loc_currency_CAD_90d27916-c520-4316-b3ea-ceba49223d37" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_USD_b4274936-3032-4073-8869-11b12661c296" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_USD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_4e2d257f-1a60-4814-918c-d4ca71169f94" xlink:to="loc_currency_USD_b4274936-3032-4073-8869-11b12661c296" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsTable_9074769b-eabc-4d35-a21e-d278a4cd6e5c" xlink:to="loc_ifrs-full_TypesOfRisksAxis_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef" xlink:to="loc_ifrs-full_TypesOfRisksMember_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_70ece2cd-1ed9-4005-b1eb-9a670f8ace5b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_7c2bbfe2-6b8a-4494-a50d-98ae8dc8d0ef" xlink:to="loc_ifrs-full_TypesOfRisksMember_70ece2cd-1ed9-4005-b1eb-9a670f8ace5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrencyRiskMember_dfd395ce-80e7-49d8-9ecc-a1b4ddf44431" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrencyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_70ece2cd-1ed9-4005-b1eb-9a670f8ace5b" xlink:to="loc_ifrs-full_CurrencyRiskMember_dfd395ce-80e7-49d8-9ecc-a1b4ddf44431" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateRiskMember_375bbd5a-7651-418c-87e3-76e73561559a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_InterestRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_70ece2cd-1ed9-4005-b1eb-9a670f8ace5b" xlink:to="loc_ifrs-full_InterestRateRiskMember_375bbd5a-7651-418c-87e3-76e73561559a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherPriceRiskMember_d85235b1-bcbb-47a7-9576-18533c30a337" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherPriceRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_70ece2cd-1ed9-4005-b1eb-9a670f8ace5b" xlink:to="loc_ifrs-full_OtherPriceRiskMember_d85235b1-bcbb-47a7-9576-18533c30a337" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities_f1e80642-0bdc-4dd1-9037-f612ed58418a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_ifrs-full_PercentageOfReasonablyPossibleIncreaseInUnobservableInputLiabilities_f1e80642-0bdc-4dd1-9037-f612ed58418a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_468960d1-f813-4687-8329-9f675bedaad0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_ifrs-full_PercentageOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_468960d1-f813-4687-8329-9f675bedaad0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BasisPointChangeOfReasonablyPossibleIncreaseInUnobservableInputLiabilities_accfa00b-9095-4994-8095-2320bcefd434" xlink:href="tixt-20231231.xsd#tixt_BasisPointChangeOfReasonablyPossibleIncreaseInUnobservableInputLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_BasisPointChangeOfReasonablyPossibleIncreaseInUnobservableInputLiabilities_accfa00b-9095-4994-8095-2320bcefd434" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BasisPointChangeOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_2a1bbd49-ce85-451e-ad38-f73b079d5292" xlink:href="tixt-20231231.xsd#tixt_BasisPointChangeOfReasonablyPossibleDecreaseInUnobservableInputLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_BasisPointChangeOfReasonablyPossibleDecreaseInUnobservableInputLiabilities_2a1bbd49-ce85-451e-ad38-f73b079d5292" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleIncreaseInRiskVariable_d66fa33b-17ea-4209-ab27-df7e45f4d88e" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleIncreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleIncreaseInRiskVariable_d66fa33b-17ea-4209-ab27-df7e45f4d88e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable_29b53d73-724e-4796-8d95-f37f56fb2f2b" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable_29b53d73-724e-4796-8d95-f37f56fb2f2b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable_000256a9-8c6a-49be-9e12-61423171f499" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleIncreaseInRiskVariable_000256a9-8c6a-49be-9e12-61423171f499" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleDecreaseInRiskVariable_ae4c71c5-7ea9-484d-9b08-7daefd143321" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleDecreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInNetIncomeDueToReasonablyPossibleDecreaseInRiskVariable_ae4c71c5-7ea9-484d-9b08-7daefd143321" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable_a28a0e42-7c36-4ca5-aec2-43086f656e37" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInOtherComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable_a28a0e42-7c36-4ca5-aec2-43086f656e37" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable_159ec1cd-2381-4042-9a4a-b8083ea4aa88" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems_59015f6f-0710-4d71-8029-67c1c310a557" xlink:to="loc_tixt_IncreaseDecreaseInComprehensiveIncomeDueToReasonablyPossibleDecreaseInRiskVariable_159ec1cd-2381-4042-9a4a-b8083ea4aa88" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksFairValuesDerivativesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#FinancialinstrumentsandmanagementoffinancialrisksFairValuesDerivativesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksFairValuesDerivativesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_84db9034-df0e-4ab1-b9ca-f9f8a79ec9d1" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativeAssetsCurrentMember_75eb7c50-64a2-409e-b50c-3c5c4076e17d" xlink:href="tixt-20231231.xsd#tixt_DerivativeAssetsCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:to="loc_tixt_DerivativeAssetsCurrentMember_75eb7c50-64a2-409e-b50c-3c5c4076e17d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativeAssetsNonCurrentMember_7b07bf7b-36de-4580-af6e-aea34157c676" xlink:href="tixt-20231231.xsd#tixt_DerivativeAssetsNonCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:to="loc_tixt_DerivativeAssetsNonCurrentMember_7b07bf7b-36de-4580-af6e-aea34157c676" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativeLiabilitiesCurrentMember_0b8a5be9-440e-4cb6-a245-0e78dbf2a6f1" xlink:href="tixt-20231231.xsd#tixt_DerivativeLiabilitiesCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:to="loc_tixt_DerivativeLiabilitiesCurrentMember_0b8a5be9-440e-4cb6-a245-0e78dbf2a6f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NonCurrentLiabilitiesDerivativesMember_dec3b7af-d0d7-4cec-9e28-c2935483df3f" xlink:href="tixt-20231231.xsd#tixt_NonCurrentLiabilitiesDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:to="loc_tixt_NonCurrentLiabilitiesDerivativesMember_dec3b7af-d0d7-4cec-9e28-c2935483df3f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_7a31e05c-4ed8-40a8-94e7-c1c4c47c0557" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_5b0311cc-a45f-4164-830d-17400d42fba8" xlink:to="loc_ifrs-full_DerivativesMember_7a31e05c-4ed8-40a8-94e7-c1c4c47c0557" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_d98ef532-92a0-4fb4-b567-b45c7ce442ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:to="loc_ifrs-full_TypesOfRisksAxis_d98ef532-92a0-4fb4-b567-b45c7ce442ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_d98ef532-92a0-4fb4-b567-b45c7ce442ec_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_d98ef532-92a0-4fb4-b567-b45c7ce442ec" xlink:to="loc_ifrs-full_TypesOfRisksMember_d98ef532-92a0-4fb4-b567-b45c7ce442ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_77bb5f12-5a7d-4050-9a62-337a7415588e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_d98ef532-92a0-4fb4-b567-b45c7ce442ec" xlink:to="loc_ifrs-full_TypesOfRisksMember_77bb5f12-5a7d-4050-9a62-337a7415588e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrencyRiskBusinessAcquisitionMember_25f19b4f-3581-4336-95bd-848b27908309" xlink:href="tixt-20231231.xsd#tixt_CurrencyRiskBusinessAcquisitionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_77bb5f12-5a7d-4050-9a62-337a7415588e" xlink:to="loc_tixt_CurrencyRiskBusinessAcquisitionMember_25f19b4f-3581-4336-95bd-848b27908309" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrencyRiskPurchaseTransactionsMember_c4b067e5-03b6-417d-9117-f9dface53ac8" xlink:href="tixt-20231231.xsd#tixt_CurrencyRiskPurchaseTransactionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_77bb5f12-5a7d-4050-9a62-337a7415588e" xlink:to="loc_tixt_CurrencyRiskPurchaseTransactionsMember_c4b067e5-03b6-417d-9117-f9dface53ac8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember_ca85d300-dce7-4da7-b373-55395628f240" xlink:href="tixt-20231231.xsd#tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_77bb5f12-5a7d-4050-9a62-337a7415588e" xlink:to="loc_tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember_ca85d300-dce7-4da7-b373-55395628f240" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_e32f4267-b1b3-46f4-b01f-8adcb905e88a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfFinancialAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:to="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_e32f4267-b1b3-46f4-b01f-8adcb905e88a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsCategoryMember_e32f4267-b1b3-46f4-b01f-8adcb905e88a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialAssetsCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_e32f4267-b1b3-46f4-b01f-8adcb905e88a" xlink:to="loc_ifrs-full_FinancialAssetsCategoryMember_e32f4267-b1b3-46f4-b01f-8adcb905e88a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsCategoryMember_5d423c98-5729-434b-ad73-2f9544329b42" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialAssetsCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfFinancialAssetsAxis_e32f4267-b1b3-46f4-b01f-8adcb905e88a" xlink:to="loc_ifrs-full_FinancialAssetsCategoryMember_5d423c98-5729-434b-ad73-2f9544329b42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember_e8ddb039-e106-43d9-b838-b135e536feb5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialAssetsCategoryMember_5d423c98-5729-434b-ad73-2f9544329b42" xlink:to="loc_ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTradingCategoryMember_e8ddb039-e106-43d9-b838-b135e536feb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesAxis_77bd37b1-fe50-45b1-a607-701fc4a4d81f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:to="loc_ifrs-full_TypesOfHedgesAxis_77bd37b1-fe50-45b1-a607-701fc4a4d81f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesMember_77bd37b1-fe50-45b1-a607-701fc4a4d81f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_77bd37b1-fe50-45b1-a607-701fc4a4d81f" xlink:to="loc_ifrs-full_TypesOfHedgesMember_77bd37b1-fe50-45b1-a607-701fc4a4d81f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesMember_e99e0e97-6d7e-4a52-b9e9-7648e3a6f752" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_77bd37b1-fe50-45b1-a607-701fc4a4d81f" xlink:to="loc_ifrs-full_TypesOfHedgesMember_e99e0e97-6d7e-4a52-b9e9-7648e3a6f752" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowHedgesMember_a9b1b341-e9e3-4dfd-9245-95cd5d24c968" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfHedgesMember_e99e0e97-6d7e-4a52-b9e9-7648e3a6f752" xlink:to="loc_ifrs-full_CashFlowHedgesMember_a9b1b341-e9e3-4dfd-9245-95cd5d24c968" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_d68b7c19-5cbd-409a-9d26-66a180ac681f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_47145e65-d852-466b-9b43-0e8ae88839ed" xlink:to="loc_srt_CurrencyAxis_d68b7c19-5cbd-409a-9d26-66a180ac681f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_d68b7c19-5cbd-409a-9d26-66a180ac681f_default" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_d68b7c19-5cbd-409a-9d26-66a180ac681f" xlink:to="loc_currency_AllCurrenciesDomain_d68b7c19-5cbd-409a-9d26-66a180ac681f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_cabdb42e-b293-4ffe-8580-55bd8093ac1c" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_d68b7c19-5cbd-409a-9d26-66a180ac681f" xlink:to="loc_currency_AllCurrenciesDomain_cabdb42e-b293-4ffe-8580-55bd8093ac1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_bde1fad1-b5b4-467f-a340-c595b5d86260" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cabdb42e-b293-4ffe-8580-55bd8093ac1c" xlink:to="loc_currency_EUR_bde1fad1-b5b4-467f-a340-c595b5d86260" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhilippinePesoMember_d4d8318a-6faa-4a73-9ead-3a023e7a8e47" xlink:href="tixt-20231231.xsd#tixt_PhilippinePesoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cabdb42e-b293-4ffe-8580-55bd8093ac1c" xlink:to="loc_tixt_PhilippinePesoMember_d4d8318a-6faa-4a73-9ead-3a023e7a8e47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_USD_534fc111-10aa-49f8-a68a-18028d12c66d" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_USD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cabdb42e-b293-4ffe-8580-55bd8093ac1c" xlink:to="loc_currency_USD_534fc111-10aa-49f8-a68a-18028d12c66d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsDerivativeInstrumentMaximumMaturityDate_c4723bc5-5f7d-472e-b679-bc56fcdd5011" xlink:href="tixt-20231231.xsd#tixt_IfrsDerivativeInstrumentMaximumMaturityDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_IfrsDerivativeInstrumentMaximumMaturityDate_c4723bc5-5f7d-472e-b679-bc56fcdd5011" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NotionalAmountCurrentDerivativeAssets_90fc648e-ee1b-4f83-9e36-97b6a7e04f54" xlink:href="tixt-20231231.xsd#tixt_NotionalAmountCurrentDerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_NotionalAmountCurrentDerivativeAssets_90fc648e-ee1b-4f83-9e36-97b6a7e04f54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialAssets_d1147bee-9ee2-4709-97f2-7561b127e499" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentDerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialAssets_d1147bee-9ee2-4709-97f2-7561b127e499" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativeWeightedAveragePricePerUnit_91d6bc00-498a-43ca-b9c5-867cff2756ae" xlink:href="tixt-20231231.xsd#tixt_DerivativeWeightedAveragePricePerUnit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_DerivativeWeightedAveragePricePerUnit_91d6bc00-498a-43ca-b9c5-867cff2756ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate_8e19752a-071a-4db0-9552-4b4a75a3c33c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_BorrowingsInterestRate_8e19752a-071a-4db0-9552-4b4a75a3c33c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NotionalAmountNonCurrentDerivativeAssets_b9e5d5b4-a8df-4585-80c9-8e1bd5773619" xlink:href="tixt-20231231.xsd#tixt_NotionalAmountNonCurrentDerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_NotionalAmountNonCurrentDerivativeAssets_b9e5d5b4-a8df-4585-80c9-8e1bd5773619" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentDerivativeFinancialAssets_e8638e6e-fd5b-49ce-8e5c-ec71503930ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentDerivativeFinancialAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_NoncurrentDerivativeFinancialAssets_e8638e6e-fd5b-49ce-8e5c-ec71503930ba" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NotionalAmountCurrentDerivativeLiabilities_fd24c6c9-1dbe-46ef-a3e4-e824535e883f" xlink:href="tixt-20231231.xsd#tixt_NotionalAmountCurrentDerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_NotionalAmountCurrentDerivativeLiabilities_fd24c6c9-1dbe-46ef-a3e4-e824535e883f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_89c4d223-26ce-45de-b99b-5324eac7f382" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_CurrentDerivativeFinancialLiabilities_89c4d223-26ce-45de-b99b-5324eac7f382" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NotionalAmountNoncurrentDerivativeLiabilities_5be91a52-0722-4302-9161-7310c08771f0" xlink:href="tixt-20231231.xsd#tixt_NotionalAmountNoncurrentDerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_NotionalAmountNoncurrentDerivativeLiabilities_5be91a52-0722-4302-9161-7310c08771f0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities_e95a0187-baf6-4351-aebf-5a2d524e63f9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentDerivativeFinancialLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_ifrs-full_NoncurrentDerivativeFinancialLiabilities_e95a0187-baf6-4351-aebf-5a2d524e63f9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsHedgeRatioPercentage_3f022a15-447c-4e2e-81e2-bc6a341b3786" xlink:href="tixt-20231231.xsd#tixt_IfrsHedgeRatioPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_8bd9247a-2df2-4b62-9595-5a66b7f623f0" xlink:to="loc_tixt_IfrsHedgeRatioPercentage_3f022a15-447c-4e2e-81e2-bc6a341b3786" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksDerivativegainsandlossesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#FinancialinstrumentsandmanagementoffinancialrisksDerivativegainsandlossesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/FinancialinstrumentsandmanagementoffinancialrisksDerivativegainsandlossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialInstrumentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_8c83f164-7c83-4fbf-a2c2-d1f9ee5d90c9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfFinancialInstrumentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:to="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_8c83f164-7c83-4fbf-a2c2-d1f9ee5d90c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesAxis_4b8216d4-18c4-4c77-99d4-5604dc094294" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_8c83f164-7c83-4fbf-a2c2-d1f9ee5d90c9" xlink:to="loc_ifrs-full_TypesOfHedgesAxis_4b8216d4-18c4-4c77-99d4-5604dc094294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesMember_4b8216d4-18c4-4c77-99d4-5604dc094294_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_4b8216d4-18c4-4c77-99d4-5604dc094294" xlink:to="loc_ifrs-full_TypesOfHedgesMember_4b8216d4-18c4-4c77-99d4-5604dc094294_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfHedgesMember_acc2b2a6-2902-4cf2-bb28-f2f27fa54a36" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfHedgesAxis_4b8216d4-18c4-4c77-99d4-5604dc094294" xlink:to="loc_ifrs-full_TypesOfHedgesMember_acc2b2a6-2902-4cf2-bb28-f2f27fa54a36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashFlowHedgesMember_efa98fd3-4036-4c04-8eb8-ef86028aae37" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashFlowHedgesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfHedgesMember_acc2b2a6-2902-4cf2-bb28-f2f27fa54a36" xlink:to="loc_ifrs-full_CashFlowHedgesMember_efa98fd3-4036-4c04-8eb8-ef86028aae37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_8c83f164-7c83-4fbf-a2c2-d1f9ee5d90c9" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_6030637e-2f6b-4349-b941-ea967cc937a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsAxis_fbaeb852-0ee9-41f7-9bfc-3cd6e142aef6" xlink:to="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_6030637e-2f6b-4349-b941-ea967cc937a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DerivativesMember_4bda1cb3-87f5-4183-b0c4-abb4014d1be9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfFinancialInstrumentsMember_6030637e-2f6b-4349-b941-ea967cc937a6" xlink:to="loc_ifrs-full_DerivativesMember_4bda1cb3-87f5-4183-b0c4-abb4014d1be9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativesHeldForHedgingMember_c23ccfd2-755d-4f8d-af9e-6f628f30f850" xlink:href="tixt-20231231.xsd#tixt_DerivativesHeldForHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DerivativesMember_4bda1cb3-87f5-4183-b0c4-abb4014d1be9" xlink:to="loc_tixt_DerivativesHeldForHedgingMember_c23ccfd2-755d-4f8d-af9e-6f628f30f850" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DerivativesHeldForTradingMember_645844b0-3cdb-4557-9546-8a3389f06023" xlink:href="tixt-20231231.xsd#tixt_DerivativesHeldForTradingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DerivativesMember_4bda1cb3-87f5-4183-b0c4-abb4014d1be9" xlink:to="loc_tixt_DerivativesHeldForTradingMember_645844b0-3cdb-4557-9546-8a3389f06023" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksAxis_31b948d5-0dc1-4bc5-85e8-c2b98b799749" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsTable_8c83f164-7c83-4fbf-a2c2-d1f9ee5d90c9" xlink:to="loc_ifrs-full_TypesOfRisksAxis_31b948d5-0dc1-4bc5-85e8-c2b98b799749" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_31b948d5-0dc1-4bc5-85e8-c2b98b799749_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfRisksAxis_31b948d5-0dc1-4bc5-85e8-c2b98b799749" xlink:to="loc_ifrs-full_TypesOfRisksMember_31b948d5-0dc1-4bc5-85e8-c2b98b799749_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfRisksMember_61e3fc90-41cc-4c5e-aa93-993cade216fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfRisksAxis_31b948d5-0dc1-4bc5-85e8-c2b98b799749" xlink:to="loc_ifrs-full_TypesOfRisksMember_61e3fc90-41cc-4c5e-aa93-993cade216fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_InterestRateRiskMember_ba4219b7-db92-42e4-b0cf-59d800bc5210" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_InterestRateRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_61e3fc90-41cc-4c5e-aa93-993cade216fd" xlink:to="loc_ifrs-full_InterestRateRiskMember_ba4219b7-db92-42e4-b0cf-59d800bc5210" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember_83fdc8e4-332c-47e8-8df2-a252238e36fa" xlink:href="tixt-20231231.xsd#tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_InterestRateRiskMember_ba4219b7-db92-42e4-b0cf-59d800bc5210" xlink:to="loc_tixt_InterestRateRiskNonFixedRateCreditFacilityAmountsDrawnMember_83fdc8e4-332c-47e8-8df2-a252238e36fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrencyRiskMember_ef96e88f-b8ae-4b5e-ba9c-9233f1fbb7fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrencyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_TypesOfRisksMember_61e3fc90-41cc-4c5e-aa93-993cade216fd" xlink:to="loc_ifrs-full_CurrencyRiskMember_ef96e88f-b8ae-4b5e-ba9c-9233f1fbb7fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss_538d6328-88e7-44fd-9699-c0aa024c06ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:to="loc_ifrs-full_GainLossOnHedgeIneffectivenessRecognisedInProfitOrLoss_538d6328-88e7-44fd-9699-c0aa024c06ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax_04e442ba-57e7-44e6-9041-f4157bc9909a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:to="loc_ifrs-full_GainsLossesOnCashFlowHedgesBeforeTax_04e442ba-57e7-44e6-9041-f4157bc9909a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax_eb9065b8-0eba-447a-b32f-82f9b02479bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:to="loc_ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax_eb9065b8-0eba-447a-b32f-82f9b02479bd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading_def81bb7-e4c4-4282-9b35-6913a0289dd3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfFinancialInstrumentsLineItems_6a99ad06-9a18-4ccd-834c-2962f8f127d3" xlink:to="loc_ifrs-full_GainsLossesOnFinancialAssetsAtFairValueThroughProfitOrLossClassifiedAsHeldForTrading_def81bb7-e4c4-4282-9b35-6913a0289dd3" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/PropertyplantandequipmentDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#PropertyplantandequipmentDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/PropertyplantandequipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_9cd95a10-8dbd-4775-8a88-f11a48eb7330" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_a63518ae-0cfa-447c-9c3d-8c112395c0d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_9cd95a10-8dbd-4775-8a88-f11a48eb7330" xlink:to="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_a63518ae-0cfa-447c-9c3d-8c112395c0d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_1612dcc9-d104-45f4-9e6b-95946f0fa25f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_a63518ae-0cfa-447c-9c3d-8c112395c0d4" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_1612dcc9-d104-45f4-9e6b-95946f0fa25f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_1612dcc9-d104-45f4-9e6b-95946f0fa25f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_1612dcc9-d104-45f4-9e6b-95946f0fa25f" xlink:to="loc_ifrs-full_CarryingAmountMember_1612dcc9-d104-45f4-9e6b-95946f0fa25f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_e91da7f8-238b-458a-b5ce-4361903efc22" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_1612dcc9-d104-45f4-9e6b-95946f0fa25f" xlink:to="loc_ifrs-full_CarryingAmountMember_e91da7f8-238b-458a-b5ce-4361903efc22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_dc4fdca7-0d6b-425c-9365-89766ed8500c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_e91da7f8-238b-458a-b5ce-4361903efc22" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_dc4fdca7-0d6b-425c-9365-89766ed8500c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember_3dd69fe8-878b-4b5b-b7c9-1f51ae1a0a03" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_e91da7f8-238b-458a-b5ce-4361903efc22" xlink:to="loc_ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember_3dd69fe8-878b-4b5b-b7c9-1f51ae1a0a03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsAxis_28be6baa-a091-4660-aa78-71c7c551a4b0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfAssetsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_a63518ae-0cfa-447c-9c3d-8c112395c0d4" xlink:to="loc_ifrs-full_ClassesOfAssetsAxis_28be6baa-a091-4660-aa78-71c7c551a4b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsMember_28be6baa-a091-4660-aa78-71c7c551a4b0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_28be6baa-a091-4660-aa78-71c7c551a4b0" xlink:to="loc_ifrs-full_ClassesOfAssetsMember_28be6baa-a091-4660-aa78-71c7c551a4b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfAssetsMember_ad48280f-0366-4190-8908-2dbd26f3f6c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfAssetsAxis_28be6baa-a091-4660-aa78-71c7c551a4b0" xlink:to="loc_ifrs-full_ClassesOfAssetsMember_ad48280f-0366-4190-8908-2dbd26f3f6c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PropertyPlantAndEquipmentOwnedAssetsMember_7accba50-c9fb-4c1e-9362-876d98907757" xlink:href="tixt-20231231.xsd#tixt_PropertyPlantAndEquipmentOwnedAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsMember_ad48280f-0366-4190-8908-2dbd26f3f6c1" xlink:to="loc_tixt_PropertyPlantAndEquipmentOwnedAssetsMember_7accba50-c9fb-4c1e-9362-876d98907757" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RightofuseAssetsMember_1297cc34-6012-4be5-b972-bafb5540bc8e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RightofuseAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfAssetsMember_ad48280f-0366-4190-8908-2dbd26f3f6c1" xlink:to="loc_ifrs-full_RightofuseAssetsMember_1297cc34-6012-4be5-b972-bafb5540bc8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_b47c8f93-f552-4e2e-bb4f-eda805089512" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentTable_a63518ae-0cfa-447c-9c3d-8c112395c0d4" xlink:to="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_b47c8f93-f552-4e2e-bb4f-eda805089512" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember_b47c8f93-f552-4e2e-bb4f-eda805089512_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_b47c8f93-f552-4e2e-bb4f-eda805089512" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentMember_b47c8f93-f552-4e2e-bb4f-eda805089512_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis_b47c8f93-f552-4e2e-bb4f-eda805089512" xlink:to="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NetworkAssetsMember_d2012993-4a1c-4460-965f-af458d562a3e" xlink:href="tixt-20231231.xsd#tixt_NetworkAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:to="loc_tixt_NetworkAssetsMember_d2012993-4a1c-4460-965f-af458d562a3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BuildingsMember_6425aeb5-12d3-4b98-a9e8-6b970ffb888e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BuildingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:to="loc_ifrs-full_BuildingsMember_6425aeb5-12d3-4b98-a9e8-6b970ffb888e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ComputerEquipmentFurnitureAndOtherMember_49f106d8-f229-4111-baa6-7fc0b6ca6536" xlink:href="tixt-20231231.xsd#tixt_ComputerEquipmentFurnitureAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:to="loc_tixt_ComputerEquipmentFurnitureAndOtherMember_49f106d8-f229-4111-baa6-7fc0b6ca6536" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsAssetUnderConstructionMember_3c3a1e25-b7ed-479e-8056-c0e49afad326" xlink:href="tixt-20231231.xsd#tixt_IfrsAssetUnderConstructionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_PropertyPlantAndEquipmentMember_ee1edc4b-27f5-4386-863c-a22ddd732e1b" xlink:to="loc_tixt_IfrsAssetUnderConstructionMember_3c3a1e25-b7ed-479e-8056-c0e49afad326" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems_9cd95a10-8dbd-4775-8a88-f11a48eb7330" xlink:to="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_9f0985f6-1522-43aa-88ef-149f372c31df" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_PropertyPlantAndEquipment_9f0985f6-1522-43aa-88ef-149f372c31df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_3d6f6ef3-e39a-4007-8b2b-c44e7888bc8f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment_3d6f6ef3-e39a-4007-8b2b-c44e7888bc8f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_d9648bd6-8c75-45f0-8237-2ec2b9e334fb" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipment_d9648bd6-8c75-45f0-8237-2ec2b9e334fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DisposalsRetirementsAndOtherPropertyPlantAndEquipment_0b1e0f23-acf3-41df-b673-e2d33881c5b0" xlink:href="tixt-20231231.xsd#tixt_DisposalsRetirementsAndOtherPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_tixt_DisposalsRetirementsAndOtherPropertyPlantAndEquipment_0b1e0f23-acf3-41df-b673-e2d33881c5b0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_fc1791f1-dd7a-424f-a9a7-45e132697792" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment_fc1791f1-dd7a-424f-a9a7-45e132697792" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_61132c5d-9d64-4757-90d5-05a18c0bb5bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment_61132c5d-9d64-4757-90d5-05a18c0bb5bd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_5ae28e9f-e1f6-4303-ae7a-1758fce0fb66" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DepreciationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract_edfd2d05-52f0-45db-877c-36e8b70daaf4" xlink:to="loc_ifrs-full_DepreciationPropertyPlantAndEquipment_5ae28e9f-e1f6-4303-ae7a-1758fce0fb66" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PropertyPlantAndEquipment_530ec66e-d58c-4fae-80d6-0c8636b92d5c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PropertyPlantAndEquipment"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/IntangibleassetsandgoodwillScheduleofIntangibleassetsandgoodwillDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#IntangibleassetsandgoodwillScheduleofIntangibleassetsandgoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/IntangibleassetsandgoodwillScheduleofIntangibleassetsandgoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_43f3579d-e688-41f2-a4fd-5b251726cf4c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_43f3579d-e688-41f2-a4fd-5b251726cf4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_07a2977c-f4b5-4b75-840e-6e47b531943b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_43f3579d-e688-41f2-a4fd-5b251726cf4c" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_07a2977c-f4b5-4b75-840e-6e47b531943b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_07a2977c-f4b5-4b75-840e-6e47b531943b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_07a2977c-f4b5-4b75-840e-6e47b531943b" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_07a2977c-f4b5-4b75-840e-6e47b531943b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_de67e74f-4838-46d8-8846-03c0c7d2d152" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_07a2977c-f4b5-4b75-840e-6e47b531943b" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_de67e74f-4838-46d8-8846-03c0c7d2d152" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsOtherThanGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_de67e74f-4838-46d8-8846-03c0c7d2d152" xlink:to="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IntangibleAssetsSubjectToAmortizationMember_ad470039-093c-49da-aedb-6bf18e84119e" xlink:href="tixt-20231231.xsd#tixt_IntangibleAssetsSubjectToAmortizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:to="loc_tixt_IntangibleAssetsSubjectToAmortizationMember_ad470039-093c-49da-aedb-6bf18e84119e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_879e1acf-a0b9-4456-b1fa-87fee0a76630" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_879e1acf-a0b9-4456-b1fa-87fee0a76630" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CrowdsourceAssetsMember_4f839e0e-c8e1-4916-8a0b-6baf7436614a" xlink:href="tixt-20231231.xsd#tixt_CrowdsourceAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:to="loc_tixt_CrowdsourceAssetsMember_4f839e0e-c8e1-4916-8a0b-6baf7436614a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ComputerSoftwareMember_fb0bdb0d-c961-4b86-911e-ea6d37a19ed1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ComputerSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:to="loc_ifrs-full_ComputerSoftwareMember_fb0bdb0d-c961-4b86-911e-ea6d37a19ed1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BrandNamesMember_0a5c2d96-59e5-4ac3-8a7c-47c0530638a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BrandNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsOtherThanGoodwillMember_e1f38682-4c14-4dd3-b1e6-cb5ad07128ec" xlink:to="loc_ifrs-full_BrandNamesMember_0a5c2d96-59e5-4ac3-8a7c-47c0530638a8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillMember_4c3326e3-4804-43f7-a915-b732391c3b7d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_de67e74f-4838-46d8-8846-03c0c7d2d152" xlink:to="loc_ifrs-full_GoodwillMember_4c3326e3-4804-43f7-a915-b732391c3b7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_54d40d38-0487-47d1-b1d5-cdbeaebd712b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_43f3579d-e688-41f2-a4fd-5b251726cf4c" xlink:to="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_54d40d38-0487-47d1-b1d5-cdbeaebd712b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_54d40d38-0487-47d1-b1d5-cdbeaebd712b_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_54d40d38-0487-47d1-b1d5-cdbeaebd712b" xlink:to="loc_ifrs-full_CarryingAmountMember_54d40d38-0487-47d1-b1d5-cdbeaebd712b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CarryingAmountMember_4c926354-79d8-4e10-9315-b8a68fc3a48f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis_54d40d38-0487-47d1-b1d5-cdbeaebd712b" xlink:to="loc_ifrs-full_CarryingAmountMember_4c926354-79d8-4e10-9315-b8a68fc3a48f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GrossCarryingAmountMember_8d9fe1e7-0732-4813-98ae-0182a0c2226d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GrossCarryingAmountMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_4c926354-79d8-4e10-9315-b8a68fc3a48f" xlink:to="loc_ifrs-full_GrossCarryingAmountMember_8d9fe1e7-0732-4813-98ae-0182a0c2226d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_42b2518c-bb1e-4e4c-a3c1-a1fda06bd353" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AccumulatedDepreciationAndAmortisationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CarryingAmountMember_4c926354-79d8-4e10-9315-b8a68fc3a48f" xlink:to="loc_ifrs-full_AccumulatedDepreciationAndAmortisationMember_42b2518c-bb1e-4e4c-a3c1-a1fda06bd353" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwill_cffa7206-d095-4e2f-bfac-b92dea6ab78d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwill_cffa7206-d095-4e2f-bfac-b92dea6ab78d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_b05c63b0-2645-4e7a-af2d-897962ed94cc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill_b05c63b0-2645-4e7a-af2d-897962ed94cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill_88997993-cddc-4b52-963d-f6778b6a8ac0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_AcquisitionsThroughBusinessCombinationsIntangibleAssetsAndGoodwill_88997993-cddc-4b52-963d-f6778b6a8ac0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_8bddcf03-90eb-4ce9-b034-462cd3e3c6fa" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_AmortisationIntangibleAssetsOtherThanGoodwill_8bddcf03-90eb-4ce9-b034-462cd3e3c6fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisposalsIntangibleAssetsAndGoodwill_eeaaac87-525d-4657-8be6-9a14c90585b3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisposalsIntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_DisposalsIntangibleAssetsAndGoodwill_eeaaac87-525d-4657-8be6-9a14c90585b3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill_ef4132e1-741a-46d5-851a-31c0d9e8f471" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_bfcc24c4-85be-492d-bb7f-c8b5199a9283" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill_ef4132e1-741a-46d5-851a-31c0d9e8f471" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwill_81321bb8-7d15-46eb-89e5-e04f73d7ca1c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/IntangibleassetsandgoodwillNarrativeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#IntangibleassetsandgoodwillNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/IntangibleassetsandgoodwillNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_c80942b2-4015-4b65-a92b-903db9ea5d36" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_c80942b2-4015-4b65-a92b-903db9ea5d36" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_05c49a50-9dec-4fc4-b7c6-9d1c478806e2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_c80942b2-4015-4b65-a92b-903db9ea5d36" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_05c49a50-9dec-4fc4-b7c6-9d1c478806e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_05c49a50-9dec-4fc4-b7c6-9d1c478806e2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_05c49a50-9dec-4fc4-b7c6-9d1c478806e2" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_05c49a50-9dec-4fc4-b7c6-9d1c478806e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_6fe49dd2-4a82-4503-bead-0c4f0978c57e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_05c49a50-9dec-4fc4-b7c6-9d1c478806e2" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_6fe49dd2-4a82-4503-bead-0c4f0978c57e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WillowTreeMember_34232de7-285e-41ca-984d-bea7243d4e0e" xlink:href="tixt-20231231.xsd#tixt_WillowTreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_6fe49dd2-4a82-4503-bead-0c4f0978c57e" xlink:to="loc_tixt_WillowTreeMember_34232de7-285e-41ca-984d-bea7243d4e0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_e2dfa282-e372-4923-822e-9160ab35114f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_6fe49dd2-4a82-4503-bead-0c4f0978c57e" xlink:to="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_e2dfa282-e372-4923-822e-9160ab35114f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_9a223275-49bc-4e2c-8f40-68c4ce871567" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_c80942b2-4015-4b65-a92b-903db9ea5d36" xlink:to="loc_ifrs-full_RangeAxis_9a223275-49bc-4e2c-8f40-68c4ce871567" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_9a223275-49bc-4e2c-8f40-68c4ce871567_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_9a223275-49bc-4e2c-8f40-68c4ce871567" xlink:to="loc_ifrs-full_RangesMember_9a223275-49bc-4e2c-8f40-68c4ce871567_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_13a6a484-52fa-4ee9-af26-a0fdda78735d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_9a223275-49bc-4e2c-8f40-68c4ce871567" xlink:to="loc_ifrs-full_RangesMember_13a6a484-52fa-4ee9-af26-a0fdda78735d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_91f339a5-d466-40df-93be-c6ab65626e38" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_13a6a484-52fa-4ee9-af26-a0fdda78735d" xlink:to="loc_ifrs-full_TopOfRangeMember_91f339a5-d466-40df-93be-c6ab65626e38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2fd6b447-960c-47cd-9103-617c6571498e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillTable_c80942b2-4015-4b65-a92b-903db9ea5d36" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2fd6b447-960c-47cd-9103-617c6571498e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_2fd6b447-960c-47cd-9103-617c6571498e_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2fd6b447-960c-47cd-9103-617c6571498e" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_2fd6b447-960c-47cd-9103-617c6571498e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_d02b6f71-9146-4636-839f-81025b668636" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_2fd6b447-960c-47cd-9103-617c6571498e" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_d02b6f71-9146-4636-839f-81025b668636" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WrittenPutOptionsRelatedToRetainedEquityInterestsMember_b43883c9-12f1-494f-b025-b5454be80ca5" xlink:href="tixt-20231231.xsd#tixt_WrittenPutOptionsRelatedToRetainedEquityInterestsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_d02b6f71-9146-4636-839f-81025b668636" xlink:to="loc_tixt_WrittenPutOptionsRelatedToRetainedEquityInterestsMember_b43883c9-12f1-494f-b025-b5454be80ca5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill_cbea1805-2572-4751-b6c8-c9b831aeb495" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_ImpairmentLossRecognisedInProfitOrLossGoodwill_cbea1805-2572-4751-b6c8-c9b831aeb495" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PeriodOverWhichManagementHasProjectedCashFlows_f633ba0b-17aa-44aa-ba54-75d06a95c64d" xlink:href="tixt-20231231.xsd#tixt_PeriodOverWhichManagementHasProjectedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_PeriodOverWhichManagementHasProjectedCashFlows_f633ba0b-17aa-44aa-ba54-75d06a95c64d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_5017353a-c01a-4cb9-a989-0d45f1e8504a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections_5017353a-c01a-4cb9-a989-0d45f1e8504a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_50dad96f-d5bd-4af2-a924-66dd4739fa47" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_DescriptionOfGrowthRateUsedToExtrapolateCashFlowProjections_50dad96f-d5bd-4af2-a924-66dd4739fa47" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PercentageOfVotingEquityInterestsAcquired_e370cb4f-3fb6-45a3-8138-e66e8b3882fa" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PercentageOfVotingEquityInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_PercentageOfVotingEquityInterestsAcquired_e370cb4f-3fb6-45a3-8138-e66e8b3882fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OwnershipInterestMaintainedByAcquiredEntityManagement_8a5ecb07-f9c5-4265-a70b-294009ea8cf4" xlink:href="tixt-20231231.xsd#tixt_OwnershipInterestMaintainedByAcquiredEntityManagement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_OwnershipInterestMaintainedByAcquiredEntityManagement_8a5ecb07-f9c5-4265-a70b-294009ea8cf4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_FutureExercisePeriod_d7212aee-0470-4649-b4cf-94bfbb3cf7f7" xlink:href="tixt-20231231.xsd#tixt_FutureExercisePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_FutureExercisePeriod_d7212aee-0470-4649-b4cf-94bfbb3cf7f7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessAcquisitionConsiderationTransferredPercentageOfShares_92c318b7-c65f-4746-a1c0-57e06c0c4e2b" xlink:href="tixt-20231231.xsd#tixt_BusinessAcquisitionConsiderationTransferredPercentageOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_BusinessAcquisitionConsiderationTransferredPercentageOfShares_92c318b7-c65f-4746-a1c0-57e06c0c4e2b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_96fcdd2e-002c-47dd-86b2-8af85d77b015" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_96fcdd2e-002c-47dd-86b2-8af85d77b015" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashTransferred_52f3c36a-8d7b-4e7c-83a3-a19b43646f39" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_CashTransferred_52f3c36a-8d7b-4e7c-83a3-a19b43646f39" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessAcquisitionConsiderationTransferredValueOfShares_ee986262-b309-403c-aaff-9b8679014818" xlink:href="tixt-20231231.xsd#tixt_BusinessAcquisitionConsiderationTransferredValueOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_BusinessAcquisitionConsiderationTransferredValueOfShares_ee986262-b309-403c-aaff-9b8679014818" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessesAcquiredNumber_bfb76013-cc10-4aa6-8289-a419dc37fcfd" xlink:href="tixt-20231231.xsd#tixt_BusinessesAcquiredNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_BusinessesAcquiredNumber_bfb76013-cc10-4aa6-8289-a419dc37fcfd" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_87ef5b06-3f28-42b1-b8fe-fdae3ce6c91e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashTransferred_e214cd7f-1e50-4819-b249-d52aff710994" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashTransferred"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewProvisionsOtherProvisions_babb2305-7fe7-402d-9c42-f27f14ff2af6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NewProvisionsOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_NewProvisionsOtherProvisions_babb2305-7fe7-402d-9c42-f27f14ff2af6" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_16954a72-a8dc-4604-b580-16127e8aa745" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_16954a72-a8dc-4604-b580-16127e8aa745" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_Goodwill_b877bb21-4904-40e4-ae53-cdc4eb43b2c3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_Goodwill_b877bb21-4904-40e4-ae53-cdc4eb43b2c3" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid_a58ce91c-2526-4562-bb71-da2b7a90e720" xlink:href="tixt-20231231.xsd#tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_ShareBasedCompensationArrangementByShareBasedPaymentAwardLiabilitiesToBePaid_a58ce91c-2526-4562-bb71-da2b7a90e720" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueOfAcquiree_479c4e8b-f4de-4d0b-9ec6-e7b8b464fa09" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RevenueOfAcquiree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_RevenueOfAcquiree_479c4e8b-f4de-4d0b-9ec6-e7b8b464fa09" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProfitLossOfAcquiree_b4dae5c8-d10b-4f5d-9834-e96374cfd265" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProfitLossOfAcquiree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_ifrs-full_ProfitLossOfAcquiree_b4dae5c8-d10b-4f5d-9834-e96374cfd265" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseInRevenueOfAcquireeSinceAcquisitionDate_016b3b9e-9e76-469c-9dfe-31a4e5c588cf" xlink:href="tixt-20231231.xsd#tixt_IncreaseInRevenueOfAcquireeSinceAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfChangesInIntangibleAssetsAndGoodwillLineItems_a49d4852-9634-4396-b3cd-60eebde959bb" xlink:to="loc_tixt_IncreaseInRevenueOfAcquireeSinceAcquisitionDate_016b3b9e-9e76-469c-9dfe-31a4e5c588cf" xlink:type="arc" order="20"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/IntangibleassetsandgoodwillBusinessacquisitionsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#IntangibleassetsandgoodwillBusinessacquisitionsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/IntangibleassetsandgoodwillBusinessacquisitionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_7c45eab1-36e8-4438-b8b4-99ab35b0c63b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfBusinessCombinationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1e7a6464-53e0-4ac1-97e6-5f2dd207483a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfBusinessCombinationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_7c45eab1-36e8-4438-b8b4-99ab35b0c63b" xlink:to="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1e7a6464-53e0-4ac1-97e6-5f2dd207483a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_8b674763-828b-4b40-815f-8a9d570a1348" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1e7a6464-53e0-4ac1-97e6-5f2dd207483a" xlink:to="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_8b674763-828b-4b40-815f-8a9d570a1348" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_8b674763-828b-4b40-815f-8a9d570a1348_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_8b674763-828b-4b40-815f-8a9d570a1348" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_8b674763-828b-4b40-815f-8a9d570a1348_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_64008f8e-9909-4b33-ba5c-cc9e12a1c283" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IntangibleAssetsAndGoodwillMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis_8b674763-828b-4b40-815f-8a9d570a1348" xlink:to="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_64008f8e-9909-4b33-ba5c-cc9e12a1c283" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_0ad5c6bb-3700-473c-b545-065e7d7c276d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CustomerrelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_64008f8e-9909-4b33-ba5c-cc9e12a1c283" xlink:to="loc_ifrs-full_CustomerrelatedIntangibleAssetsMember_0ad5c6bb-3700-473c-b545-065e7d7c276d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BrandNamesAndOtherIntangibleAssetsMember_6806aab7-2012-4536-b924-7e1845c28ba0" xlink:href="tixt-20231231.xsd#tixt_BrandNamesAndOtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_IntangibleAssetsAndGoodwillMember_64008f8e-9909-4b33-ba5c-cc9e12a1c283" xlink:to="loc_tixt_BrandNamesAndOtherIntangibleAssetsMember_6806aab7-2012-4536-b924-7e1845c28ba0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_81c9e2fc-3e08-4172-8956-58c0012920a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1e7a6464-53e0-4ac1-97e6-5f2dd207483a" xlink:to="loc_ifrs-full_RangeAxis_81c9e2fc-3e08-4172-8956-58c0012920a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_81c9e2fc-3e08-4172-8956-58c0012920a8_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_81c9e2fc-3e08-4172-8956-58c0012920a8" xlink:to="loc_ifrs-full_RangesMember_81c9e2fc-3e08-4172-8956-58c0012920a8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_3cf236fc-b31b-4324-ab6a-827827faf2ac" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_81c9e2fc-3e08-4172-8956-58c0012920a8" xlink:to="loc_ifrs-full_RangesMember_3cf236fc-b31b-4324-ab6a-827827faf2ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_a2b9884f-6762-4682-90ca-b3a6e380aaa5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_3cf236fc-b31b-4324-ab6a-827827faf2ac" xlink:to="loc_ifrs-full_BottomOfRangeMember_a2b9884f-6762-4682-90ca-b3a6e380aaa5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_55b4d22e-1de1-4ebc-bbcb-3cdcb7a5df6e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_3cf236fc-b31b-4324-ab6a-827827faf2ac" xlink:to="loc_ifrs-full_TopOfRangeMember_55b4d22e-1de1-4ebc-bbcb-3cdcb7a5df6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_fa7fd647-bb0b-480a-84f2-f3d9baace766" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsTable_1e7a6464-53e0-4ac1-97e6-5f2dd207483a" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_fa7fd647-bb0b-480a-84f2-f3d9baace766" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_fa7fd647-bb0b-480a-84f2-f3d9baace766_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_fa7fd647-bb0b-480a-84f2-f3d9baace766" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_fa7fd647-bb0b-480a-84f2-f3d9baace766_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_800f922a-ff44-48ab-8771-83a83e355f08" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_fa7fd647-bb0b-480a-84f2-f3d9baace766" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_800f922a-ff44-48ab-8771-83a83e355f08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_A2023AcquisitionsMember_8a6d739a-f8e5-448e-8c85-b72c437c996c" xlink:href="tixt-20231231.xsd#tixt_A2023AcquisitionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_800f922a-ff44-48ab-8771-83a83e355f08" xlink:to="loc_tixt_A2023AcquisitionsMember_8a6d739a-f8e5-448e-8c85-b72c437c996c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WillowTreeMember_6673d28d-7beb-4481-9527-2ce8de4a08fa" xlink:href="tixt-20231231.xsd#tixt_WillowTreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_A2023AcquisitionsMember_8a6d739a-f8e5-448e-8c85-b72c437c996c" xlink:to="loc_tixt_WillowTreeMember_6673d28d-7beb-4481-9527-2ce8de4a08fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_a3dd0654-8c21-4e81-aaa4-afa289b370cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_A2023AcquisitionsMember_8a6d739a-f8e5-448e-8c85-b72c437c996c" xlink:to="loc_ifrs-full_AggregatedIndividuallyImmaterialBusinessCombinationsMember_a3dd0654-8c21-4e81-aaa4-afa289b370cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OwnedAssetsRecognizedAsOfAcquisitionDate_3f268023-a688-4b9f-ba04-75d1dffb5aa6" xlink:href="tixt-20231231.xsd#tixt_OwnedAssetsRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_7c45eab1-36e8-4438-b8b4-99ab35b0c63b" xlink:to="loc_tixt_OwnedAssetsRecognizedAsOfAcquisitionDate_3f268023-a688-4b9f-ba04-75d1dffb5aa6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_7c45eab1-36e8-4438-b8b4-99ab35b0c63b" xlink:to="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AssetsAbstract_c7141a35-8aa8-4175-980e-1d16963177e7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_AssetsAbstract_c7141a35-8aa8-4175-980e-1d16963177e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_c7141a35-8aa8-4175-980e-1d16963177e7" xlink:to="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_290ac1e9-ee03-42a0-8c93-dfc367781569" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:to="loc_ifrs-full_CashAndCashEquivalentsRecognisedAsOfAcquisitionDate_290ac1e9-ee03-42a0-8c93-dfc367781569" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FairValueOfAcquiredReceivables_e24d1e5b-d6fc-4254-b200-31e5f57dbb6a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FairValueOfAcquiredReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:to="loc_ifrs-full_FairValueOfAcquiredReceivables_e24d1e5b-d6fc-4254-b200-31e5f57dbb6a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PrepaidAndOtherAssetsRecognizedAsOfAcquisitionDate_e3f1a7f2-ba7a-4a1f-8a02-c8d28af5d1d2" xlink:href="tixt-20231231.xsd#tixt_PrepaidAndOtherAssetsRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:to="loc_tixt_PrepaidAndOtherAssetsRecognizedAsOfAcquisitionDate_e3f1a7f2-ba7a-4a1f-8a02-c8d28af5d1d2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_a3b69507-bdf1-4852-b82b-c037435df7d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentAssetsAbstract_2de76764-5462-406a-83d0-426551cfec7c" xlink:to="loc_ifrs-full_CurrentAssetsRecognisedAsOfAcquisitionDate_a3b69507-bdf1-4852-b82b-c037435df7d6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsAbstract_880debf2-bfba-4ce8-9506-a85a17e26d46" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_c7141a35-8aa8-4175-980e-1d16963177e7" xlink:to="loc_ifrs-full_NoncurrentAssetsAbstract_880debf2-bfba-4ce8-9506-a85a17e26d46" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OwnedAssetsRecognizedAsOfAcquisitionDate_63ec8d4d-1836-4556-83f3-e4fbda9b8368" xlink:href="tixt-20231231.xsd#tixt_OwnedAssetsRecognizedAsOfAcquisitionDate"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RightOfUseLeaseAssetsRecognizedAsOfAcquisitionDate_280cd79f-58e5-4445-8582-7cfd564d3532" xlink:href="tixt-20231231.xsd#tixt_RightOfUseLeaseAssetsRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_880debf2-bfba-4ce8-9506-a85a17e26d46" xlink:to="loc_tixt_RightOfUseLeaseAssetsRecognizedAsOfAcquisitionDate_280cd79f-58e5-4445-8582-7cfd564d3532" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_dec7e272-95c6-43b1-a42a-1b749ced7d2a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_880debf2-bfba-4ce8-9506-a85a17e26d46" xlink:to="loc_ifrs-full_IdentifiableIntangibleAssetsRecognisedAsOfAcquisitionDate_dec7e272-95c6-43b1-a42a-1b749ced7d2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_f4d7cb09-70e0-4c51-8d6f-5313a7f42569" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentAssetsAbstract_880debf2-bfba-4ce8-9506-a85a17e26d46" xlink:to="loc_ifrs-full_NoncurrentAssetsRecognisedAsOfAcquisitionDate_f4d7cb09-70e0-4c51-8d6f-5313a7f42569" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IdentifiableAssetsAcquiredRecognizedAsOfAcquisitionDate_500cedf1-8eb1-4d7c-a5bd-663406504df9" xlink:href="tixt-20231231.xsd#tixt_IdentifiableAssetsAcquiredRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AssetsAbstract_c7141a35-8aa8-4175-980e-1d16963177e7" xlink:to="loc_tixt_IdentifiableAssetsAcquiredRecognizedAsOfAcquisitionDate_500cedf1-8eb1-4d7c-a5bd-663406504df9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesAbstract_16e95c86-4da8-4a93-b43b-c21e25f3d821" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_LiabilitiesAbstract_16e95c86-4da8-4a93-b43b-c21e25f3d821" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_16e95c86-4da8-4a93-b43b-c21e25f3d821" xlink:to="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate_f19071b1-6550-48e0-bf0a-413fee03c23e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:to="loc_ifrs-full_FinancialLiabilitiesRecognisedAsOfAcquisitionDate_f19071b1-6550-48e0-bf0a-413fee03c23e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncomeAndOtherTaxesPayableRecognizedAsOfAcquisitionDate_4af7103d-ebfe-4930-8aa4-46ccd5c14f12" xlink:href="tixt-20231231.xsd#tixt_IncomeAndOtherTaxesPayableRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:to="loc_tixt_IncomeAndOtherTaxesPayableRecognizedAsOfAcquisitionDate_4af7103d-ebfe-4930-8aa4-46ccd5c14f12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CurrentPortionOfLongTermDebtRecognizedAsOfAcquisitionDate_c06e76c8-9f15-48c9-aab9-5aef19369055" xlink:href="tixt-20231231.xsd#tixt_CurrentPortionOfLongTermDebtRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:to="loc_tixt_CurrentPortionOfLongTermDebtRecognizedAsOfAcquisitionDate_c06e76c8-9f15-48c9-aab9-5aef19369055" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_4795307e-32d2-4ac5-9aee-d9a7341eb85a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_CurrentLiabilitiesAbstract_026ac554-bc15-466b-85e5-34da9de9e15b" xlink:to="loc_ifrs-full_CurrentLiabilitiesRecognisedAsOfAcquisitionDate_4795307e-32d2-4ac5-9aee-d9a7341eb85a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesAbstract_783f6788-345f-45e5-b039-18ecd6cc41c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentLiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_16e95c86-4da8-4a93-b43b-c21e25f3d821" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesAbstract_783f6788-345f-45e5-b039-18ecd6cc41c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LongTermDebtRecognizedAsOfAcquisitionDate_b9a67444-010e-4a66-b416-6f19cac9ba9e" xlink:href="tixt-20231231.xsd#tixt_LongTermDebtRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_783f6788-345f-45e5-b039-18ecd6cc41c1" xlink:to="loc_tixt_LongTermDebtRecognizedAsOfAcquisitionDate_b9a67444-010e-4a66-b416-6f19cac9ba9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate_23be09e1-08fb-49ee-a35c-edfebcfb4029" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_783f6788-345f-45e5-b039-18ecd6cc41c1" xlink:to="loc_ifrs-full_DeferredTaxLiabilitiesRecognisedAsOfAcquisitionDate_23be09e1-08fb-49ee-a35c-edfebcfb4029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_758ca340-d4a5-4412-9abe-f854f01de421" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NoncurrentLiabilitiesAbstract_783f6788-345f-45e5-b039-18ecd6cc41c1" xlink:to="loc_ifrs-full_NoncurrentLiabilitiesRecognisedAsOfAcquisitionDate_758ca340-d4a5-4412-9abe-f854f01de421" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IdentifiableLiabilitiesRecognizedAsOfAcquisitionDate_e77a98b9-c921-4330-b117-2bcac4f24199" xlink:href="tixt-20231231.xsd#tixt_IdentifiableLiabilitiesRecognizedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesAbstract_16e95c86-4da8-4a93-b43b-c21e25f3d821" xlink:to="loc_tixt_IdentifiableLiabilitiesRecognizedAsOfAcquisitionDate_e77a98b9-c921-4330-b117-2bcac4f24199" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_3f62ee5e-0cfc-4e37-8cf4-67936fb47ee6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_3f62ee5e-0cfc-4e37-8cf4-67936fb47ee6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_01af60e3-315c-4926-89cf-736d87d1b9c4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GoodwillRecognisedAsOfAcquisitionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_GoodwillRecognisedAsOfAcquisitionDate_01af60e3-315c-4926-89cf-736d87d1b9c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_b2920028-8d00-4d2f-9d12-65b915df71c0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_b2920028-8d00-4d2f-9d12-65b915df71c0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract_7603338e-9a66-4f7d-863b-b3fd7ebcb143" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AmountsRecognisedAsOfAcquisitionDateForEachMajorClassOfAssetsAcquiredAndLiabilitiesAssumedAbstract_5af1b787-9676-4bef-9b69-3cb0bb2d81e6" xlink:to="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract_7603338e-9a66-4f7d-863b-b3fd7ebcb143" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CashTransferred_9984720c-fbc3-4c25-a7e9-b9aa65641dcd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CashTransferred"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract_7603338e-9a66-4f7d-863b-b3fd7ebcb143" xlink:to="loc_ifrs-full_CashTransferred_9984720c-fbc3-4c25-a7e9-b9aa65641dcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NewProvisionsOtherProvisions_0d044102-848f-47a7-b7dd-eea85b1f1052" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NewProvisionsOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract_7603338e-9a66-4f7d-863b-b3fd7ebcb143" xlink:to="loc_ifrs-full_NewProvisionsOtherProvisions_0d044102-848f-47a7-b7dd-eea85b1f1052" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessAcquisitionConsiderationTransferredValueOfShares_e8f40084-f5e8-4ab3-8e60-cecbb92ef88c" xlink:href="tixt-20231231.xsd#tixt_BusinessAcquisitionConsiderationTransferredValueOfShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract_7603338e-9a66-4f7d-863b-b3fd7ebcb143" xlink:to="loc_tixt_BusinessAcquisitionConsiderationTransferredValueOfShares_e8f40084-f5e8-4ab3-8e60-cecbb92ef88c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred_c0fbda12-2cab-4da9-a6b3-e969db098142" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AcquisitiondateFairValueOfTotalConsiderationTransferred"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_cfd14aa1-703e-4a33-8bc2-9cb18ed0e851" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfBusinessCombinationsLineItems_7c45eab1-36e8-4438-b8b4-99ab35b0c63b" xlink:to="loc_ifrs-full_UsefulLifeMeasuredAsPeriodOfTimeIntangibleAssetsOtherThanGoodwill_cfd14aa1-703e-4a33-8bc2-9cb18ed0e851" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/ProvisionsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#ProvisionsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/ProvisionsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfOtherProvisionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfOtherProvisionsTable_4cd3f614-0445-4efa-b0bf-ec44317d2fc6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfOtherProvisionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_DisclosureOfOtherProvisionsTable_4cd3f614-0445-4efa-b0bf-ec44317d2fc6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfProvisionsAxis_547850f5-6477-4733-bf97-6307b3dcf125" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfProvisionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsTable_4cd3f614-0445-4efa-b0bf-ec44317d2fc6" xlink:to="loc_ifrs-full_ClassesOfProvisionsAxis_547850f5-6477-4733-bf97-6307b3dcf125" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisionsMember_547850f5-6477-4733-bf97-6307b3dcf125_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_547850f5-6477-4733-bf97-6307b3dcf125" xlink:to="loc_ifrs-full_OtherProvisionsMember_547850f5-6477-4733-bf97-6307b3dcf125_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisionsMember_b5247054-6437-4161-a312-ccc83f3cd1a9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfProvisionsAxis_547850f5-6477-4733-bf97-6307b3dcf125" xlink:to="loc_ifrs-full_OtherProvisionsMember_b5247054-6437-4161-a312-ccc83f3cd1a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RestructuringProvisionMember_b27303cc-f6cd-4ac9-b235-2bcc47e19b29" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RestructuringProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OtherProvisionsMember_b5247054-6437-4161-a312-ccc83f3cd1a9" xlink:to="loc_ifrs-full_RestructuringProvisionMember_b27303cc-f6cd-4ac9-b235-2bcc47e19b29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WrittenPutOptionProvisionMember_fd0689a6-1e23-4fd7-a3d8-d4721eb536c6" xlink:href="tixt-20231231.xsd#tixt_WrittenPutOptionProvisionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OtherProvisionsMember_b5247054-6437-4161-a312-ccc83f3cd1a9" xlink:to="loc_tixt_WrittenPutOptionProvisionMember_fd0689a6-1e23-4fd7-a3d8-d4721eb536c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MiscellaneousOtherProvisionsMember_2d84272d-b5c3-4e30-a4c8-1694d180c57b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MiscellaneousOtherProvisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OtherProvisionsMember_b5247054-6437-4161-a312-ccc83f3cd1a9" xlink:to="loc_ifrs-full_MiscellaneousOtherProvisionsMember_2d84272d-b5c3-4e30-a4c8-1694d180c57b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisions_e95258b7-1ebb-46fa-9976-80e2977272ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_OtherProvisions_e95258b7-1ebb-46fa-9976-80e2977272ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UnusedProvisionReversedOtherProvisions_88c5581d-8f01-426c-9cc2-ec6eb61fe8bd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UnusedProvisionReversedOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_UnusedProvisionReversedOtherProvisions_88c5581d-8f01-426c-9cc2-ec6eb61fe8bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AdditionalProvisionsOtherProvisions_11ce44ca-69f8-410b-a5fe-8c77641507ff" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AdditionalProvisionsOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_AdditionalProvisionsOtherProvisions_11ce44ca-69f8-410b-a5fe-8c77641507ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProvisionUsedOtherProvisions_696eaad3-cca4-4e6a-84ac-0ce08b3548f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProvisionUsedOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_ProvisionUsedOtherProvisions_696eaad3-cca4-4e6a-84ac-0ce08b3548f3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions_b8c5fb08-ea46-4cae-ba09-9d0be2eb32ed" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughTimeValueOfMoneyAdjustmentOtherProvisions_b8c5fb08-ea46-4cae-ba09-9d0be2eb32ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_InterestEffectOtherProvisions_bf3cf4de-4cae-4561-9485-bd32e90842ec" xlink:href="tixt-20231231.xsd#tixt_InterestEffectOtherProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_tixt_InterestEffectOtherProvisions_bf3cf4de-4cae-4561-9485-bd32e90842ec" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherProvisions_e14269cf-a684-4588-a937-989830c910b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherProvisions"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherShorttermProvisions_440b72f1-84cd-42d2-b0cb-35df7a57379e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherShorttermProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_OtherShorttermProvisions_440b72f1-84cd-42d2-b0cb-35df7a57379e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OtherLongtermProvisions_2da858c1-5b55-4376-87b8-11fd6236d4d2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OtherLongtermProvisions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfOtherProvisionsLineItems_bdb56c94-427d-411c-a1bd-088c679b4224" xlink:to="loc_ifrs-full_OtherLongtermProvisions_2da858c1-5b55-4376-87b8-11fd6236d4d2" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/LongtermdebtDetailsoflongtermdebtDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#LongtermdebtDetailsoflongtermdebtDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/LongtermdebtDetailsoflongtermdebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_439d3bad-f17e-4b56-bfcf-528577225375" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_4800f722-26b2-410b-9420-f01e8866c0d6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_439d3bad-f17e-4b56-bfcf-528577225375" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_4800f722-26b2-410b-9420-f01e8866c0d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_e1b78f71-2a81-48b7-8567-11889b79d21a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_4800f722-26b2-410b-9420-f01e8866c0d6" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_e1b78f71-2a81-48b7-8567-11889b79d21a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_e1b78f71-2a81-48b7-8567-11889b79d21a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_e1b78f71-2a81-48b7-8567-11889b79d21a" xlink:to="loc_ifrs-full_BorrowingsByNameMember_e1b78f71-2a81-48b7-8567-11889b79d21a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_00c3f483-7c89-4dfd-a559-4374d5689f9a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_e1b78f71-2a81-48b7-8567-11889b79d21a" xlink:to="loc_ifrs-full_BorrowingsByNameMember_00c3f483-7c89-4dfd-a559-4374d5689f9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CreditFacilityMember_25a1623c-47c2-4452-8554-a4eca6d18107" xlink:href="tixt-20231231.xsd#tixt_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_00c3f483-7c89-4dfd-a559-4374d5689f9a" xlink:to="loc_tixt_CreditFacilityMember_25a1623c-47c2-4452-8554-a4eca6d18107" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:href="tixt-20231231.xsd#tixt_DetailsOfLongTermDebtAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_439d3bad-f17e-4b56-bfcf-528577225375" xlink:to="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GrossBorrowings_edabd53d-d69b-47a7-b5bd-82364e673173" xlink:href="tixt-20231231.xsd#tixt_GrossBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_tixt_GrossBorrowings_edabd53d-d69b-47a7-b5bd-82364e673173" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsDeferredFinanceCostsNet_19449f5d-c9ac-43fa-bd99-5a9f46bbe2a2" xlink:href="tixt-20231231.xsd#tixt_IfrsDeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_tixt_IfrsDeferredFinanceCostsNet_19449f5d-c9ac-43fa-bd99-5a9f46bbe2a2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LongTermBorrowingsCurrentAndNonCurrentExcludingLeaseLiabilities_3ff269ae-ac8f-48c3-9c4b-8401f0a595eb" xlink:href="tixt-20231231.xsd#tixt_LongTermBorrowingsCurrentAndNonCurrentExcludingLeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_tixt_LongTermBorrowingsCurrentAndNonCurrentExcludingLeaseLiabilities_3ff269ae-ac8f-48c3-9c4b-8401f0a595eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilities_20f5e35b-1c44-470d-83fb-85335998127c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LeaseLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_ifrs-full_LeaseLiabilities_20f5e35b-1c44-470d-83fb-85335998127c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LongTermBorrowingsCurrentAndNonCurrent_98118f2e-02d4-4bd1-933f-8efe62e65064" xlink:href="tixt-20231231.xsd#tixt_LongTermBorrowingsCurrentAndNonCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_tixt_LongTermBorrowingsCurrentAndNonCurrent_98118f2e-02d4-4bd1-933f-8efe62e65064" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CurrentPortionOfLongtermBorrowings_644da0c8-c852-4ee0-9e91-eaf4f5a1e0e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CurrentPortionOfLongtermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_ifrs-full_CurrentPortionOfLongtermBorrowings_644da0c8-c852-4ee0-9e91-eaf4f5a1e0e6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowings_d046bfec-c82c-44d5-982e-6a770f8ebab4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LongtermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_DetailsOfLongTermDebtAbstract_ea4ce296-3a0f-4b4c-bb09-e9c5cb767726" xlink:to="loc_ifrs-full_LongtermBorrowings_d046bfec-c82c-44d5-982e-6a770f8ebab4" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/LongtermdebtCreditfacilityDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#LongtermdebtCreditfacilityDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/LongtermdebtCreditfacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1463793b-8042-4ca7-bce8-99cda427289f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1463793b-8042-4ca7-bce8-99cda427289f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_d268fd6b-09bc-412b-96ff-a26f8721bcab" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1463793b-8042-4ca7-bce8-99cda427289f" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_d268fd6b-09bc-412b-96ff-a26f8721bcab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_d268fd6b-09bc-412b-96ff-a26f8721bcab_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_d268fd6b-09bc-412b-96ff-a26f8721bcab" xlink:to="loc_ifrs-full_BorrowingsByNameMember_d268fd6b-09bc-412b-96ff-a26f8721bcab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_2ec93ef6-94e9-4a6f-99bd-2bdd329658ea" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_d268fd6b-09bc-412b-96ff-a26f8721bcab" xlink:to="loc_ifrs-full_BorrowingsByNameMember_2ec93ef6-94e9-4a6f-99bd-2bdd329658ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CreditFacilityMember_00648116-73ff-498c-8174-b98492f0305e" xlink:href="tixt-20231231.xsd#tixt_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_2ec93ef6-94e9-4a6f-99bd-2bdd329658ea" xlink:to="loc_tixt_CreditFacilityMember_00648116-73ff-498c-8174-b98492f0305e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_7f98b81e-1c5c-428f-a567-beed6baf997f" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CreditFacilityMember_00648116-73ff-498c-8174-b98492f0305e" xlink:to="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_7f98b81e-1c5c-428f-a567-beed6baf997f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncTermLoanMember_ed94cfd7-2ec6-4743-bc25-13be11dfd541" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_CreditFacilityMember_00648116-73ff-498c-8174-b98492f0305e" xlink:to="loc_tixt_TelusInternationalCdaIncTermLoanMember_ed94cfd7-2ec6-4743-bc25-13be11dfd541" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_cfcd571a-b6f9-4f60-bb60-b32da5d17baf" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1463793b-8042-4ca7-bce8-99cda427289f" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_cfcd571a-b6f9-4f60-bb60-b32da5d17baf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_cfcd571a-b6f9-4f60-bb60-b32da5d17baf_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_cfcd571a-b6f9-4f60-bb60-b32da5d17baf" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_cfcd571a-b6f9-4f60-bb60-b32da5d17baf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_177ae5a7-4529-427e-8f51-c8a56e8be76c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_cfcd571a-b6f9-4f60-bb60-b32da5d17baf" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_177ae5a7-4529-427e-8f51-c8a56e8be76c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_ed7852e7-ae88-490f-8767-5fe3e2f8e809" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_177ae5a7-4529-427e-8f51-c8a56e8be76c" xlink:to="loc_ifrs-full_ParentMember_ed7852e7-ae88-490f-8767-5fe3e2f8e809" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f391d6e7-a99b-4ee1-a828-8da951048fab" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_1463793b-8042-4ca7-bce8-99cda427289f" xlink:to="loc_dei_LegalEntityAxis_f391d6e7-a99b-4ee1-a828-8da951048fab" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f391d6e7-a99b-4ee1-a828-8da951048fab_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f391d6e7-a99b-4ee1-a828-8da951048fab" xlink:to="loc_dei_EntityDomain_f391d6e7-a99b-4ee1-a828-8da951048fab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_19725d0b-28f3-4014-b58a-5952eb3d02c7" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f391d6e7-a99b-4ee1-a828-8da951048fab" xlink:to="loc_dei_EntityDomain_19725d0b-28f3-4014-b58a-5952eb3d02c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LendersInSyndicateOtherThanTelusCorporationMember_2dace94b-02ab-4f91-9995-ec66e9cbea0e" xlink:href="tixt-20231231.xsd#tixt_LendersInSyndicateOtherThanTelusCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_19725d0b-28f3-4014-b58a-5952eb3d02c7" xlink:to="loc_tixt_LendersInSyndicateOtherThanTelusCorporationMember_2dace94b-02ab-4f91-9995-ec66e9cbea0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_UndrawnBorrowingFacilities_15a40857-f06c-4778-9d70-1ec6678c2ebe" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_UndrawnBorrowingFacilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:to="loc_ifrs-full_UndrawnBorrowingFacilities_15a40857-f06c-4778-9d70-1ec6678c2ebe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GrossBorrowings_da76dd7f-7269-45ac-b946-fcdc898d3dbf" xlink:href="tixt-20231231.xsd#tixt_GrossBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:to="loc_tixt_GrossBorrowings_da76dd7f-7269-45ac-b946-fcdc898d3dbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_64245e03-c1db-487a-82df-bb51788296b4" xlink:href="tixt-20231231.xsd#tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:to="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_64245e03-c1db-487a-82df-bb51788296b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsInterestRate_4299e63a-eafc-4924-969f-19f6ada32a27" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_747e6447-c7a8-4270-813e-b2105af71183" xlink:to="loc_ifrs-full_BorrowingsInterestRate_4299e63a-eafc-4924-969f-19f6ada32a27" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/LongtermdebtNarrativeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#LongtermdebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/LongtermdebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_26196a29-df2a-4e54-853b-8d5f89dca309" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_26196a29-df2a-4e54-853b-8d5f89dca309" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_26196a29-df2a-4e54-853b-8d5f89dca309_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_26196a29-df2a-4e54-853b-8d5f89dca309" xlink:to="loc_ifrs-full_BorrowingsByNameMember_26196a29-df2a-4e54-853b-8d5f89dca309_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_5e3c08b0-9112-426f-969a-5fcb641eb3fd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_26196a29-df2a-4e54-853b-8d5f89dca309" xlink:to="loc_ifrs-full_BorrowingsByNameMember_5e3c08b0-9112-426f-969a-5fcb641eb3fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CreditFacilityMember_f7967cff-0519-480c-b743-0f49d71e41da" xlink:href="tixt-20231231.xsd#tixt_CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_5e3c08b0-9112-426f-969a-5fcb641eb3fd" xlink:to="loc_tixt_CreditFacilityMember_f7967cff-0519-480c-b743-0f49d71e41da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_b58711da-5f41-4be9-a9c2-463b08076e0f" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_5e3c08b0-9112-426f-969a-5fcb641eb3fd" xlink:to="loc_tixt_TelusInternationalCdaIncRevolvingCreditFacilityMember_b58711da-5f41-4be9-a9c2-463b08076e0f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaIncTermLoanMember_047a36ea-3244-436c-8d9e-36b8e32c96b1" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaIncTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_5e3c08b0-9112-426f-969a-5fcb641eb3fd" xlink:to="loc_tixt_TelusInternationalCdaIncTermLoanMember_047a36ea-3244-436c-8d9e-36b8e32c96b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_790e38e5-818a-4b0f-a751-ad747b06bd9f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_790e38e5-818a-4b0f-a751-ad747b06bd9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_790e38e5-818a-4b0f-a751-ad747b06bd9f_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_790e38e5-818a-4b0f-a751-ad747b06bd9f" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_790e38e5-818a-4b0f-a751-ad747b06bd9f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0e365a58-3f99-47bc-a268-871b0cfc82a8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_790e38e5-818a-4b0f-a751-ad747b06bd9f" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0e365a58-3f99-47bc-a268-871b0cfc82a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_d8eecd5b-2ae2-4dfe-8727-befdaf0f4482" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0e365a58-3f99-47bc-a268-871b0cfc82a8" xlink:to="loc_ifrs-full_ParentMember_d8eecd5b-2ae2-4dfe-8727-befdaf0f4482" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SubsidiariesMember_9f258a32-b2ed-4dfd-8a22-9aadd3200f5b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0e365a58-3f99-47bc-a268-871b0cfc82a8" xlink:to="loc_srt_SubsidiariesMember_9f258a32-b2ed-4dfd-8a22-9aadd3200f5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_70983948-026a-4e25-b819-7b870f8fa908" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_dei_LegalEntityAxis_70983948-026a-4e25-b819-7b870f8fa908" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_70983948-026a-4e25-b819-7b870f8fa908_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_70983948-026a-4e25-b819-7b870f8fa908" xlink:to="loc_dei_EntityDomain_70983948-026a-4e25-b819-7b870f8fa908_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f020875a-7212-412c-a212-db7b7a4d0f41" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_70983948-026a-4e25-b819-7b870f8fa908" xlink:to="loc_dei_EntityDomain_f020875a-7212-412c-a212-db7b7a4d0f41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LendersInSyndicateOtherThanTelusCorporationMember_b5a88935-bfdc-4b99-92b6-b05c90aab3ac" xlink:href="tixt-20231231.xsd#tixt_LendersInSyndicateOtherThanTelusCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_f020875a-7212-412c-a212-db7b7a4d0f41" xlink:to="loc_tixt_LendersInSyndicateOtherThanTelusCorporationMember_b5a88935-bfdc-4b99-92b6-b05c90aab3ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_baa93eb7-194b-4f7f-aab6-a34e66b45aee" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_MaturityAxis_baa93eb7-194b-4f7f-aab6-a34e66b45aee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_baa93eb7-194b-4f7f-aab6-a34e66b45aee_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_baa93eb7-194b-4f7f-aab6-a34e66b45aee" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_baa93eb7-194b-4f7f-aab6-a34e66b45aee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_baa93eb7-194b-4f7f-aab6-a34e66b45aee" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_de7a97f3-ab13-4269-a234-01dc52f5406d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_de7a97f3-ab13-4269-a234-01dc52f5406d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearMember_7e03905b-47f3-42d3-bd89-2973a25b7f1e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:to="loc_ifrs-full_LaterThanOneYearMember_7e03905b-47f3-42d3-bd89-2973a25b7f1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LaterThanTwoYearsMember_c0ce0bc4-ac3a-4bc6-ad2d-321b93a88a5c" xlink:href="tixt-20231231.xsd#tixt_LaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:to="loc_tixt_LaterThanTwoYearsMember_c0ce0bc4-ac3a-4bc6-ad2d-321b93a88a5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LaterThanEightFiscalQuartersMember_4c3822a3-8904-4321-a866-4bb7463762be" xlink:href="tixt-20231231.xsd#tixt_LaterThanEightFiscalQuartersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_84f70a35-2fc0-4d9e-9478-2bc7a770255a" xlink:to="loc_tixt_LaterThanEightFiscalQuartersMember_4c3822a3-8904-4321-a866-4bb7463762be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_e68768ac-3bd8-4a00-9d40-626f97db614d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_RangeAxis_e68768ac-3bd8-4a00-9d40-626f97db614d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_e68768ac-3bd8-4a00-9d40-626f97db614d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_e68768ac-3bd8-4a00-9d40-626f97db614d" xlink:to="loc_ifrs-full_RangesMember_e68768ac-3bd8-4a00-9d40-626f97db614d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_190bed65-e97c-45ef-b7a6-e132f81ec9b2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_e68768ac-3bd8-4a00-9d40-626f97db614d" xlink:to="loc_ifrs-full_RangesMember_190bed65-e97c-45ef-b7a6-e132f81ec9b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_af237cab-8ac3-42e8-aa99-28528787a72c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_190bed65-e97c-45ef-b7a6-e132f81ec9b2" xlink:to="loc_ifrs-full_TopOfRangeMember_af237cab-8ac3-42e8-aa99-28528787a72c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_70e00696-a199-4407-bd86-9f0065a9dd7a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_190bed65-e97c-45ef-b7a6-e132f81ec9b2" xlink:to="loc_ifrs-full_BottomOfRangeMember_70e00696-a199-4407-bd86-9f0065a9dd7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_9e24cae8-b45f-48db-84b6-948a41f72517" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_srt_StatementScenarioAxis_9e24cae8-b45f-48db-84b6-948a41f72517" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_9e24cae8-b45f-48db-84b6-948a41f72517_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_9e24cae8-b45f-48db-84b6-948a41f72517" xlink:to="loc_srt_ScenarioUnspecifiedDomain_9e24cae8-b45f-48db-84b6-948a41f72517_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_1c7c5670-301c-42aa-962b-c5b11604c691" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_9e24cae8-b45f-48db-84b6-948a41f72517" xlink:to="loc_srt_ScenarioUnspecifiedDomain_1c7c5670-301c-42aa-962b-c5b11604c691" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfAcquisitionWithAggregateCashConsiderationInExcessOf60MillionOccursInAnyTwelveMonthPeriodMember_bac38514-6ae9-4c60-b707-3af252515dd9" xlink:href="tixt-20231231.xsd#tixt_IfAcquisitionWithAggregateCashConsiderationInExcessOf60MillionOccursInAnyTwelveMonthPeriodMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_1c7c5670-301c-42aa-962b-c5b11604c691" xlink:to="loc_tixt_IfAcquisitionWithAggregateCashConsiderationInExcessOf60MillionOccursInAnyTwelveMonthPeriodMember_bac38514-6ae9-4c60-b707-3af252515dd9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_01597e76-2b01-454c-b23f-9681f6f86523" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_01597e76-2b01-454c-b23f-9681f6f86523" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_01597e76-2b01-454c-b23f-9681f6f86523_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_01597e76-2b01-454c-b23f-9681f6f86523" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_01597e76-2b01-454c-b23f-9681f6f86523_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_8c81d558-aa56-4ff4-bb68-f34a80575f8e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_01597e76-2b01-454c-b23f-9681f6f86523" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_8c81d558-aa56-4ff4-bb68-f34a80575f8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_94e606e7-7d3c-4eec-b499-1fd62dbf6d5d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_8c81d558-aa56-4ff4-bb68-f34a80575f8e" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_94e606e7-7d3c-4eec-b499-1fd62dbf6d5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_0614282c-7fcc-428e-b4a1-31bf4cd50db5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3af2eaab-a910-4894-90e7-ba64d45b6524" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_0614282c-7fcc-428e-b4a1-31bf4cd50db5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsMember_0614282c-7fcc-428e-b4a1-31bf4cd50db5_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_0614282c-7fcc-428e-b4a1-31bf4cd50db5" xlink:to="loc_ifrs-full_NonadjustingEventsMember_0614282c-7fcc-428e-b4a1-31bf4cd50db5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsMember_97b89dae-8c74-4e0e-bef2-058e9ab94600" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_0614282c-7fcc-428e-b4a1-31bf4cd50db5" xlink:to="loc_ifrs-full_NonadjustingEventsMember_97b89dae-8c74-4e0e-bef2-058e9ab94600" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorBusinessCombinationMember_2c9e67ca-9b75-4466-8bdc-6f81b5f4c3ef" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MajorBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsMember_97b89dae-8c74-4e0e-bef2-058e9ab94600" xlink:to="loc_ifrs-full_MajorBusinessCombinationMember_2c9e67ca-9b75-4466-8bdc-6f81b5f4c3ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_f83a6c38-3dad-460b-b320-b4fd3f93cde9" xlink:href="tixt-20231231.xsd#tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_IfrsLineOfCreditFacilityMaximumBorrowingCapacity_f83a6c38-3dad-460b-b320-b4fd3f93cde9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromNoncurrentBorrowings_127ed23e-602c-4993-a06a-198f89d3e914" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProceedsFromNoncurrentBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_ifrs-full_ProceedsFromNoncurrentBorrowings_127ed23e-602c-4993-a06a-198f89d3e914" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BorrowingsEffectiveInterestRate_edf8f116-e214-48e7-8e33-2cd7de8c8250" xlink:href="tixt-20231231.xsd#tixt_BorrowingsEffectiveInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_BorrowingsEffectiveInterestRate_edf8f116-e214-48e7-8e33-2cd7de8c8250" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NetDebtToEbitdaRatio_9231aa87-f0e2-4041-8484-989578c0cdc1" xlink:href="tixt-20231231.xsd#tixt_NetDebtToEbitdaRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_NetDebtToEbitdaRatio_9231aa87-f0e2-4041-8484-989578c0cdc1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RatioOfOperatingCashFlowToDebtServiceRatio_2b44c1f7-a1ff-4941-bdc5-bbcf4c36a921" xlink:href="tixt-20231231.xsd#tixt_RatioOfOperatingCashFlowToDebtServiceRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_RatioOfOperatingCashFlowToDebtServiceRatio_2b44c1f7-a1ff-4941-bdc5-bbcf4c36a921" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BusinessCombinationMinimumCashConsiderationForIncreaseInRequiredNetDebtToEbitdaRatio_d5bb2dc8-c626-4718-b57b-c3c665f7a6a7" xlink:href="tixt-20231231.xsd#tixt_BusinessCombinationMinimumCashConsiderationForIncreaseInRequiredNetDebtToEbitdaRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_BusinessCombinationMinimumCashConsiderationForIncreaseInRequiredNetDebtToEbitdaRatio_d5bb2dc8-c626-4718-b57b-c3c665f7a6a7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PercentageOfPrincipalAdvanceToRepayBorrowings_eeadbb98-6896-4630-9d13-cc3a8f1674bd" xlink:href="tixt-20231231.xsd#tixt_PercentageOfPrincipalAdvanceToRepayBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_PercentageOfPrincipalAdvanceToRepayBorrowings_eeadbb98-6896-4630-9d13-cc3a8f1674bd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BorrowingsWeightedAverageInterestRate_cfcd374f-b9ba-42f3-a687-672b3aaf4066" xlink:href="tixt-20231231.xsd#tixt_BorrowingsWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_4c6fe772-1062-4435-882a-fffcc66c4c6c" xlink:to="loc_tixt_BorrowingsWeightedAverageInterestRate_cfcd374f-b9ba-42f3-a687-672b3aaf4066" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/LongtermdebtLongtermdebtmaturitiesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#LongtermdebtLongtermdebtmaturitiesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/LongtermdebtLongtermdebtmaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_76109072-dc34-4180-95a8-7b678dc8f724" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3db05810-65eb-41e2-9706-0d02f32874ad" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_76109072-dc34-4180-95a8-7b678dc8f724" xlink:to="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3db05810-65eb-41e2-9706-0d02f32874ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MaturityAxis_81e2eacd-1a72-4216-96fc-8c4403a3eb0d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MaturityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3db05810-65eb-41e2-9706-0d02f32874ad" xlink:to="loc_ifrs-full_MaturityAxis_81e2eacd-1a72-4216-96fc-8c4403a3eb0d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_81e2eacd-1a72-4216-96fc-8c4403a3eb0d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_MaturityAxis_81e2eacd-1a72-4216-96fc-8c4403a3eb0d" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_81e2eacd-1a72-4216-96fc-8c4403a3eb0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AggregatedTimeBandsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_MaturityAxis_81e2eacd-1a72-4216-96fc-8c4403a3eb0d" xlink:to="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotLaterThanOneYearMember_430d8697-d993-471b-8fe7-b28bcbc46d56" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NotLaterThanOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_NotLaterThanOneYearMember_430d8697-d993-471b-8fe7-b28bcbc46d56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_e87e79a0-1985-4d3b-abb6-a55a16d4857d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember_e87e79a0-1985-4d3b-abb6-a55a16d4857d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_57a13e0e-d39b-4671-8595-1267aa029372" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember_57a13e0e-d39b-4671-8595-1267aa029372" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_4e9097e9-7700-4615-b7c9-a80cde2ba440" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember_4e9097e9-7700-4615-b7c9-a80cde2ba440" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_f6d592be-84de-4b60-a443-803da46e6be4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember_f6d592be-84de-4b60-a443-803da46e6be4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LaterThanTenYearsMember_864dcb07-45bd-4a99-98b6-57334b316768" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LaterThanTenYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_AggregatedTimeBandsMember_0c9570b5-b033-457c-bdd2-21f4d2682d6a" xlink:to="loc_ifrs-full_LaterThanTenYearsMember_864dcb07-45bd-4a99-98b6-57334b316768" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_b8972b38-76d4-4530-992c-a2c3298999dc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3db05810-65eb-41e2-9706-0d02f32874ad" xlink:to="loc_srt_CurrencyAxis_b8972b38-76d4-4530-992c-a2c3298999dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_b8972b38-76d4-4530-992c-a2c3298999dc_default" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_b8972b38-76d4-4530-992c-a2c3298999dc" xlink:to="loc_currency_AllCurrenciesDomain_b8972b38-76d4-4530-992c-a2c3298999dc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_cadc59e4-41b7-424d-b635-eaaa2ed7a258" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_b8972b38-76d4-4530-992c-a2c3298999dc" xlink:to="loc_currency_AllCurrenciesDomain_cadc59e4-41b7-424d-b635-eaaa2ed7a258" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_USD_73f7354a-590c-4f40-9fc0-5c35e3c7e589" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_USD"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cadc59e4-41b7-424d-b635-eaaa2ed7a258" xlink:to="loc_currency_USD_73f7354a-590c-4f40-9fc0-5c35e3c7e589" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_EUR_1e68b523-7693-4ef4-9b0f-51dd5d3c0c43" xlink:href="https://xbrl.sec.gov/currency/2023/currency-2023.xsd#currency_EUR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cadc59e4-41b7-424d-b635-eaaa2ed7a258" xlink:to="loc_currency_EUR_1e68b523-7693-4ef4-9b0f-51dd5d3c0c43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OtherCurrenciesMember_f9b0c4ac-95fd-4fd2-a524-5aed8596dfb2" xlink:href="tixt-20231231.xsd#tixt_OtherCurrenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_cadc59e4-41b7-424d-b635-eaaa2ed7a258" xlink:to="loc_tixt_OtherCurrenciesMember_f9b0c4ac-95fd-4fd2-a524-5aed8596dfb2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_75c8c5dd-76fe-44cc-a288-e16335f980c7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfFinancialLiabilitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsTable_3db05810-65eb-41e2-9706-0d02f32874ad" xlink:to="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_75c8c5dd-76fe-44cc-a288-e16335f980c7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember_75c8c5dd-76fe-44cc-a288-e16335f980c7_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_75c8c5dd-76fe-44cc-a288-e16335f980c7" xlink:to="loc_ifrs-full_FinancialLiabilitiesMember_75c8c5dd-76fe-44cc-a288-e16335f980c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_FinancialLiabilitiesMember_5dc5b748-0e50-485d-b35e-cb5311aae313" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_FinancialLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfFinancialLiabilitiesAxis_75c8c5dd-76fe-44cc-a288-e16335f980c7" xlink:to="loc_ifrs-full_FinancialLiabilitiesMember_5dc5b748-0e50-485d-b35e-cb5311aae313" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LongtermBorrowingsExcludingLeaseLiabilitiesMember_f3ad750a-c0c5-405a-8b3a-66612ffc659b" xlink:href="tixt-20231231.xsd#tixt_LongtermBorrowingsExcludingLeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_5dc5b748-0e50-485d-b35e-cb5311aae313" xlink:to="loc_tixt_LongtermBorrowingsExcludingLeaseLiabilitiesMember_f3ad750a-c0c5-405a-8b3a-66612ffc659b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_38071396-aa28-42ca-9d84-bfdc07d049c1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_5dc5b748-0e50-485d-b35e-cb5311aae313" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_38071396-aa28-42ca-9d84-bfdc07d049c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowingsMember_e8053227-4c1b-4d29-8874-fb1267ec12a0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LongtermBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_FinancialLiabilitiesMember_5dc5b748-0e50-485d-b35e-cb5311aae313" xlink:to="loc_ifrs-full_LongtermBorrowingsMember_e8053227-4c1b-4d29-8874-fb1267ec12a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NotionalAmount_1e080164-1f56-48d9-8efd-80b126359653" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_76109072-dc34-4180-95a8-7b678dc8f724" xlink:to="loc_ifrs-full_NotionalAmount_1e080164-1f56-48d9-8efd-80b126359653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_FutureCashOutflowsLongTermDebtInterestAndLikeCarryingCosts_5163bb2e-15d7-409c-ab03-9a11f2c0ce83" xlink:href="tixt-20231231.xsd#tixt_FutureCashOutflowsLongTermDebtInterestAndLikeCarryingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_76109072-dc34-4180-95a8-7b678dc8f724" xlink:to="loc_tixt_FutureCashOutflowsLongTermDebtInterestAndLikeCarryingCosts_5163bb2e-15d7-409c-ab03-9a11f2c0ce83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows_856a854b-2122-40a0-aada-87f393a294c2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems_76109072-dc34-4180-95a8-7b678dc8f724" xlink:to="loc_ifrs-full_NonderivativeFinancialLiabilitiesUndiscountedCashFlows_856a854b-2122-40a0-aada-87f393a294c2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharecapitalNarrativeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharecapitalNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharecapitalNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_2dcb85bc-3d78-4ed4-bb7d-ee817a23fd26" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_SubordinateVotingSharesMember_1b464d83-7541-4684-8283-6f1ba627d482" xlink:href="tixt-20231231.xsd#tixt_SubordinateVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_SubordinateVotingSharesMember_1b464d83-7541-4684-8283-6f1ba627d482" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesMember_cdb15280-fe8a-404a-8b09-e9d42eb166d6" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_MultipleVotingSharesMember_cdb15280-fe8a-404a-8b09-e9d42eb166d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_InitialPublicOfferingMember_af818a8d-75a2-49f8-baad-0c8a0be59a89" xlink:href="tixt-20231231.xsd#tixt_InitialPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_InitialPublicOfferingMember_af818a8d-75a2-49f8-baad-0c8a0be59a89" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesToSubordinateVotingSharesMember_c4d6c0ba-6a0d-496d-b9b0-b661745fb5c8" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesToSubordinateVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_MultipleVotingSharesToSubordinateVotingSharesMember_c4d6c0ba-6a0d-496d-b9b0-b661745fb5c8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderOurShareBasedCompensationPlansMember_77343adb-f47d-4e22-840e-3b5e0e733577" xlink:href="tixt-20231231.xsd#tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderOurShareBasedCompensationPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderOurShareBasedCompensationPlansMember_77343adb-f47d-4e22-840e-3b5e0e733577" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderEmployeeSharePurchasePlanMember_fa893cd6-5d1c-454b-aee7-69924a955be6" xlink:href="tixt-20231231.xsd#tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderEmployeeSharePurchasePlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_7be2eac0-acbd-4068-b38e-13d8f2d478a7" xlink:to="loc_tixt_UnissuedSubordinateVotingSharesReservedForIssuanceUnderEmployeeSharePurchasePlanMember_fa893cd6-5d1c-454b-aee7-69924a955be6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_758e0873-5de4-4c1c-835a-b0964b9bdd2c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_758e0873-5de4-4c1c-835a-b0964b9bdd2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_758e0873-5de4-4c1c-835a-b0964b9bdd2c_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_758e0873-5de4-4c1c-835a-b0964b9bdd2c" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_758e0873-5de4-4c1c-835a-b0964b9bdd2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_062cc398-d29f-4d17-b574-422c3007a52e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_758e0873-5de4-4c1c-835a-b0964b9bdd2c" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_062cc398-d29f-4d17-b574-422c3007a52e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BaringPrivateEquityAsiaMember_7618cf18-2f3a-44ac-9841-1867e058c9c8" xlink:href="tixt-20231231.xsd#tixt_BaringPrivateEquityAsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_062cc398-d29f-4d17-b574-422c3007a52e" xlink:to="loc_tixt_BaringPrivateEquityAsiaMember_7618cf18-2f3a-44ac-9841-1867e058c9c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsAfterReportingPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:to="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsMember_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1" xlink:to="loc_ifrs-full_NonadjustingEventsMember_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NonadjustingEventsMember_69bf486f-1f5a-4b10-957d-b2c6d3f2edb1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NonadjustingEventsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_NonadjustingEventsAfterReportingPeriodAxis_2aacc1bc-e692-4fd7-a394-fd7d547cb9f1" xlink:to="loc_ifrs-full_NonadjustingEventsMember_69bf486f-1f5a-4b10-957d-b2c6d3f2edb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_MajorBusinessCombinationMember_30d9ab3d-9b77-4da6-b9a0-799c45d7a96f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_MajorBusinessCombinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_NonadjustingEventsMember_69bf486f-1f5a-4b10-957d-b2c6d3f2edb1" xlink:to="loc_ifrs-full_MajorBusinessCombinationMember_30d9ab3d-9b77-4da6-b9a0-799c45d7a96f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_38949e10-59ec-44b8-8cc7-025c8deaa382" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_1843b452-81b3-46f0-922b-5bdc1f4550e3" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_38949e10-59ec-44b8-8cc7-025c8deaa382" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_38949e10-59ec-44b8-8cc7-025c8deaa382_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_38949e10-59ec-44b8-8cc7-025c8deaa382" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_38949e10-59ec-44b8-8cc7-025c8deaa382_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfc151e4-d945-458e-bf61-fa3bf95b59f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_38949e10-59ec-44b8-8cc7-025c8deaa382" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfc151e4-d945-458e-bf61-fa3bf95b59f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WillowTreeMember_063d5275-7877-4a0a-9331-18d25f25c1dc" xlink:href="tixt-20231231.xsd#tixt_WillowTreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_cfc151e4-d945-458e-bf61-fa3bf95b59f0" xlink:to="loc_tixt_WillowTreeMember_063d5275-7877-4a0a-9331-18d25f25c1dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfVotePerCommonShare_ec04e1c3-c665-43c1-8f1c-37bac90c7357" xlink:href="tixt-20231231.xsd#tixt_NumberOfVotePerCommonShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_NumberOfVotePerCommonShare_ec04e1c3-c665-43c1-8f1c-37bac90c7357" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonShareSplitRatio_77a02bc1-e93f-49de-8ed3-c830fd34e89f" xlink:href="tixt-20231231.xsd#tixt_CommonShareSplitRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_CommonShareSplitRatio_77a02bc1-e93f-49de-8ed3-c830fd34e89f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesIssued_2fe7f0bb-dbe9-4ed3-bb36-bc525e3e7247" xlink:href="tixt-20231231.xsd#tixt_CommonSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_CommonSharesIssued_2fe7f0bb-dbe9-4ed3-bb36-bc525e3e7247" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_EquitySecuritiesSharesIssuedPricePerShare_b36128da-9587-428f-84cf-344050ae4be0" xlink:href="tixt-20231231.xsd#tixt_EquitySecuritiesSharesIssuedPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_EquitySecuritiesSharesIssuedPricePerShare_b36128da-9587-428f-84cf-344050ae4be0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GrossProceedsFromIssuingShares_bbaa5773-879c-4ddc-90a9-7d359dd6718b" xlink:href="tixt-20231231.xsd#tixt_GrossProceedsFromIssuingShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_GrossProceedsFromIssuingShares_bbaa5773-879c-4ddc-90a9-7d359dd6718b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromIssuingShares_67c45f0c-92cc-4ed7-afb6-081a56ee35d7" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProceedsFromIssuingShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_ProceedsFromIssuingShares_67c45f0c-92cc-4ed7-afb6-081a56ee35d7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShareIssueRelatedCost_4729da25-cd43-41d3-8798-5dd425410e38" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ShareIssueRelatedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_ShareIssueRelatedCost_4729da25-cd43-41d3-8798-5dd425410e38" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DeferredTaxExpenseIncome_0c71ed54-989b-4b28-8b8b-cf8c898e2dee" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DeferredTaxExpenseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_DeferredTaxExpenseIncome_0c71ed54-989b-4b28-8b8b-cf8c898e2dee" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesSold_8c057a9e-4140-47a9-8689-02ddfffb8fae" xlink:href="tixt-20231231.xsd#tixt_CommonSharesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_CommonSharesSold_8c057a9e-4140-47a9-8689-02ddfffb8fae" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_7164c3ed-ec54-45e2-9620-ac863f4b9431" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_NumberOfSharesIssued_7164c3ed-ec54-45e2-9620-ac863f4b9431" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesConverted_93789c08-185c-4246-96b0-4a41237611ed" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_NumberOfSharesConverted_93789c08-185c-4246-96b0-4a41237611ed" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesConverted_8ccde243-c74a-4ffd-a960-984638df11b3" xlink:href="tixt-20231231.xsd#tixt_CommonSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_tixt_CommonSharesConverted_8ccde243-c74a-4ffd-a960-984638df11b3" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests_ec05181a-7c5d-4556-8626-b6edd9b9b265" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests_ec05181a-7c5d-4556-8626-b6edd9b9b265" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesAuthorised_b2a497c1-5009-4af8-b9cc-bc2993ec9d92" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesAuthorised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_0936ad2f-6f03-4840-aeba-c84070e8f197" xlink:to="loc_ifrs-full_NumberOfSharesAuthorised_b2a497c1-5009-4af8-b9cc-bc2993ec9d92" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SharecapitalAuthorizedsharecapitalDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SharecapitalAuthorizedsharecapitalDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SharecapitalAuthorizedsharecapitalDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_2b456a67-d07e-4fe4-9978-b5667065f91e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_c2ff29bc-4574-4072-99ba-da9a9d96149c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfClassesOfShareCapitalTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_2b456a67-d07e-4fe4-9978-b5667065f91e" xlink:to="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_c2ff29bc-4574-4072-99ba-da9a9d96149c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_3ec317f9-1561-4565-a06c-89fea05f4418" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalTable_c2ff29bc-4574-4072-99ba-da9a9d96149c" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_3ec317f9-1561-4565-a06c-89fea05f4418" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_3ec317f9-1561-4565-a06c-89fea05f4418_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_3ec317f9-1561-4565-a06c-89fea05f4418" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_3ec317f9-1561-4565-a06c-89fea05f4418_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_3ec317f9-1561-4565-a06c-89fea05f4418" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassAOrdinarySharesMember_df766125-089e-47e3-9e48-644ce99fa8fa" xlink:href="tixt-20231231.xsd#tixt_ClassAOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:to="loc_tixt_ClassAOrdinarySharesMember_df766125-089e-47e3-9e48-644ce99fa8fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassBOrdinarySharesMember_1c0ff434-aae7-4fb4-b157-bea34457ae82" xlink:href="tixt-20231231.xsd#tixt_ClassBOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:to="loc_tixt_ClassBOrdinarySharesMember_1c0ff434-aae7-4fb4-b157-bea34457ae82" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassCOrdinarySharesMember_4b058deb-c89f-438d-86d8-92dfdeee7d09" xlink:href="tixt-20231231.xsd#tixt_ClassCOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:to="loc_tixt_ClassCOrdinarySharesMember_4b058deb-c89f-438d-86d8-92dfdeee7d09" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassDOrdinarySharesMember_600cf601-8bcf-472b-98b1-78ef4b03a746" xlink:href="tixt-20231231.xsd#tixt_ClassDOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:to="loc_tixt_ClassDOrdinarySharesMember_600cf601-8bcf-472b-98b1-78ef4b03a746" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassEOrdinarySharesMember_18c68073-fd4f-4864-a12d-d0165f6ba1f9" xlink:href="tixt-20231231.xsd#tixt_ClassEOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_58af1064-75ba-40fe-9479-f835e1647719" xlink:to="loc_tixt_ClassEOrdinarySharesMember_18c68073-fd4f-4864-a12d-d0165f6ba1f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfSharesIssued_521d5f21-c017-4c71-b391-9f72e5b1d68b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfClassesOfShareCapitalLineItems_2b456a67-d07e-4fe4-9978-b5667065f91e" xlink:to="loc_ifrs-full_NumberOfSharesIssued_521d5f21-c017-4c71-b391-9f72e5b1d68b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/EmployeefuturebenefitsDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#EmployeefuturebenefitsDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/EmployeefuturebenefitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsDefinedContributionPlanLineItems_7f7aea6e-84a4-48b5-bf78-b8a417734390" xlink:href="tixt-20231231.xsd#tixt_IfrsDefinedContributionPlanLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsDefinedContributionPlanTable_a26ff634-e9d0-44d6-aaa6-0818bf7b1104" xlink:href="tixt-20231231.xsd#tixt_IfrsDefinedContributionPlanTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_tixt_IfrsDefinedContributionPlanLineItems_7f7aea6e-84a4-48b5-bf78-b8a417734390" xlink:to="loc_tixt_IfrsDefinedContributionPlanTable_a26ff634-e9d0-44d6-aaa6-0818bf7b1104" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_942f1822-3fca-48f4-a702-1a87a901d3c5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tixt_IfrsDefinedContributionPlanTable_a26ff634-e9d0-44d6-aaa6-0818bf7b1104" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_942f1822-3fca-48f4-a702-1a87a901d3c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_942f1822-3fca-48f4-a702-1a87a901d3c5_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_942f1822-3fca-48f4-a702-1a87a901d3c5" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_942f1822-3fca-48f4-a702-1a87a901d3c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2c2546e5-77e9-454d-b9b1-1f866b4ef3a6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_942f1822-3fca-48f4-a702-1a87a901d3c5" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2c2546e5-77e9-454d-b9b1-1f866b4ef3a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_2ef33be0-bb12-4f6b-bb48-abf5fadbf57a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2c2546e5-77e9-454d-b9b1-1f866b4ef3a6" xlink:to="loc_srt_ParentCompanyMember_2ef33be0-bb12-4f6b-bb48-abf5fadbf57a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansAxis_8137e35d-0581-4b41-8231-5d07bbfd64b1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DefinedBenefitPlansAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_tixt_IfrsDefinedContributionPlanTable_a26ff634-e9d0-44d6-aaa6-0818bf7b1104" xlink:to="loc_ifrs-full_DefinedBenefitPlansAxis_8137e35d-0581-4b41-8231-5d07bbfd64b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansMember_8137e35d-0581-4b41-8231-5d07bbfd64b1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DefinedBenefitPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_8137e35d-0581-4b41-8231-5d07bbfd64b1" xlink:to="loc_ifrs-full_DefinedBenefitPlansMember_8137e35d-0581-4b41-8231-5d07bbfd64b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansMember_4f63077b-80d3-4502-a3be-387c621a7184" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DefinedBenefitPlansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_DefinedBenefitPlansAxis_8137e35d-0581-4b41-8231-5d07bbfd64b1" xlink:to="loc_ifrs-full_DefinedBenefitPlansMember_4f63077b-80d3-4502-a3be-387c621a7184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_4a03d2aa-74d5-4178-bdcf-cd4b807c13e6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DefinedBenefitPlansMember_4f63077b-80d3-4502-a3be-387c621a7184" xlink:to="loc_ifrs-full_DefinedBenefitPlansOtherThanMultiemployerPlansStatePlansAndPlansThatShareRisksBetweenEntitiesUnderCommonControlMember_4a03d2aa-74d5-4178-bdcf-cd4b807c13e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DefinedContributionEmployerMatchingContributionToEmployeesFivePercentContribution_cc9559fe-ac30-4c17-9e73-425a82a7470f" xlink:href="tixt-20231231.xsd#tixt_DefinedContributionEmployerMatchingContributionToEmployeesFivePercentContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsDefinedContributionPlanLineItems_7f7aea6e-84a4-48b5-bf78-b8a417734390" xlink:to="loc_tixt_DefinedContributionEmployerMatchingContributionToEmployeesFivePercentContribution_cc9559fe-ac30-4c17-9e73-425a82a7470f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_b69a611a-e3fe-411e-bf18-7ac422232ce9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsDefinedContributionPlanLineItems_7f7aea6e-84a4-48b5-bf78-b8a417734390" xlink:to="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_b69a611a-e3fe-411e-bf18-7ac422232ce9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_15f4af8d-dee0-4ba2-be68-98511fb82294" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilityAssetOfDefinedBenefitPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_tixt_IfrsDefinedContributionPlanLineItems_7f7aea6e-84a4-48b5-bf78-b8a417734390" xlink:to="loc_ifrs-full_LiabilityAssetOfDefinedBenefitPlans_15f4af8d-dee0-4ba2-be68-98511fb82294" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/RelatedpartytransactionsScheduleoftransactionswithTELUSCorporationDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#RelatedpartytransactionsScheduleoftransactionswithTELUSCorporationDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/RelatedpartytransactionsScheduleoftransactionswithTELUSCorporationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_f54b53e6-9a67-44d4-bb96-343a048bdde5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_f54b53e6-9a67-44d4-bb96-343a048bdde5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_783fdcbf-e96a-47be-8cfd-b7022ee24536" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_f54b53e6-9a67-44d4-bb96-343a048bdde5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_783fdcbf-e96a-47be-8cfd-b7022ee24536" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_783fdcbf-e96a-47be-8cfd-b7022ee24536_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_783fdcbf-e96a-47be-8cfd-b7022ee24536" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_783fdcbf-e96a-47be-8cfd-b7022ee24536_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2b0ed1dc-8bdf-4f73-973e-b32017f69648" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_783fdcbf-e96a-47be-8cfd-b7022ee24536" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2b0ed1dc-8bdf-4f73-973e-b32017f69648" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_309ab6eb-5991-485d-974a-ec413fe26d0a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2b0ed1dc-8bdf-4f73-973e-b32017f69648" xlink:to="loc_srt_ParentCompanyMember_309ab6eb-5991-485d-974a-ec413fe26d0a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_SubsidiariesOfParentMember_1f9d8a02-d9d8-445a-abf3-dbb0235db593" xlink:href="tixt-20231231.xsd#tixt_SubsidiariesOfParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2b0ed1dc-8bdf-4f73-973e-b32017f69648" xlink:to="loc_tixt_SubsidiariesOfParentMember_1f9d8a02-d9d8-445a-abf3-dbb0235db593" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ParentAndSubsidiariesOfParentMember_b2175f8e-0436-402b-bf1e-6ee3618a9701" xlink:href="tixt-20231231.xsd#tixt_ParentAndSubsidiariesOfParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_2b0ed1dc-8bdf-4f73-973e-b32017f69648" xlink:to="loc_tixt_ParentAndSubsidiariesOfParentMember_b2175f8e-0436-402b-bf1e-6ee3618a9701" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions_5fa680fe-c370-4325-8d3f-db45e726a077" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_RevenueFromRenderingOfServicesRelatedPartyTransactions_5fa680fe-c370-4325-8d3f-db45e726a077" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PurchaseOfGoodsAndServicesRelatedPartyTransactions_da59186e-bb1d-42af-b476-c4d570a5b699" xlink:href="tixt-20231231.xsd#tixt_PurchaseOfGoodsAndServicesRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_PurchaseOfGoodsAndServicesRelatedPartyTransactions_da59186e-bb1d-42af-b476-c4d570a5b699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GrossProfitRelatedPartyTransactions_0dcf3dd9-7a49-493c-bc81-45395c06060a" xlink:href="tixt-20231231.xsd#tixt_GrossProfitRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_GrossProfitRelatedPartyTransactions_0dcf3dd9-7a49-493c-bc81-45395c06060a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ReceiptsFromRelatedParties_5859d45c-679c-40df-85fb-7fc49e1ead04" xlink:href="tixt-20231231.xsd#tixt_ReceiptsFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_ReceiptsFromRelatedParties_5859d45c-679c-40df-85fb-7fc49e1ead04" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PaymentsToRelatedParties_af466bac-6603-4d1d-bd76-a41885da2262" xlink:href="tixt-20231231.xsd#tixt_PaymentsToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_PaymentsToRelatedParties_af466bac-6603-4d1d-bd76-a41885da2262" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PaymentsMadeByRelatedPartiesOnCompanySBehalf_b48dbf50-aed3-4a31-b8c3-8b54de867513" xlink:href="tixt-20231231.xsd#tixt_PaymentsMadeByRelatedPartiesOnCompanySBehalf"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_PaymentsMadeByRelatedPartiesOnCompanySBehalf_b48dbf50-aed3-4a31-b8c3-8b54de867513" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseThroughNetExchangeDifferencesRelatedPartyTransactions_bc68807d-988e-4ed5-b0af-b752a1ce6d3c" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseThroughNetExchangeDifferencesRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_IncreaseDecreaseThroughNetExchangeDifferencesRelatedPartyTransactions_bc68807d-988e-4ed5-b0af-b752a1ce6d3c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseInRelatedPartyTransactions_b8f7991f-1afa-4df8-8656-71eecc3fc67a" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseInRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_tixt_IncreaseDecreaseInRelatedPartyTransactions_b8f7991f-1afa-4df8-8656-71eecc3fc67a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsReceivableRelatedPartyTransactions_feb4b120-ae18-4951-9a27-36974e451733" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsReceivableRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_AmountsReceivableRelatedPartyTransactions_feb4b120-ae18-4951-9a27-36974e451733" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_7969db6e-1266-42ba-a0be-8f2c5f10e7cf" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_7969db6e-1266-42ba-a0be-8f2c5f10e7cf" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_cc55d7d2-5aa9-4faa-b6e4-80c6073b5de5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsReceivableRelatedPartyTransactions_3c0c6f17-c683-48ce-99d0-92a0989b2e33" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsReceivableRelatedPartyTransactions"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_5b389cb3-9cf8-4f7e-a22f-79a8c9438292" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_TradeAndOtherCurrentReceivablesDueFromRelatedParties_5b389cb3-9cf8-4f7e-a22f-79a8c9438292" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_b0c58d60-6e45-4442-bc1c-5fd2659e206f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_TradeAndOtherCurrentPayablesToRelatedParties_b0c58d60-6e45-4442-bc1c-5fd2659e206f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_477427a7-f328-43a1-920c-2861af61f3f3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_fed64553-edda-46d1-9209-dcf914663f55" xlink:to="loc_ifrs-full_PostemploymentBenefitExpenseDefinedContributionPlans_477427a7-f328-43a1-920c-2861af61f3f3" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/RelatedpartytransactionsOthertransactionswithTELUSCorporationDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#RelatedpartytransactionsOthertransactionswithTELUSCorporationDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/RelatedpartytransactionsOthertransactionswithTELUSCorporationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_6e5492bd-1da5-4abc-bb33-af285dbb27be" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_6e5492bd-1da5-4abc-bb33-af285dbb27be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_b26b754a-3c81-48b4-941c-af767d6cbdd1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_6e5492bd-1da5-4abc-bb33-af285dbb27be" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_b26b754a-3c81-48b4-941c-af767d6cbdd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_b26b754a-3c81-48b4-941c-af767d6cbdd1_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_b26b754a-3c81-48b4-941c-af767d6cbdd1" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_b26b754a-3c81-48b4-941c-af767d6cbdd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_5efd9082-8df1-4b1f-9059-dee762f9854e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_b26b754a-3c81-48b4-941c-af767d6cbdd1" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_5efd9082-8df1-4b1f-9059-dee762f9854e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_3a0a939a-64cf-43ad-921b-35410df0a24c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_5efd9082-8df1-4b1f-9059-dee762f9854e" xlink:to="loc_srt_ParentCompanyMember_3a0a939a-64cf-43ad-921b-35410df0a24c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BaringPrivateEquityAsiaMember_a1dd518d-098c-4b41-a3e9-9902029f6396" xlink:href="tixt-20231231.xsd#tixt_BaringPrivateEquityAsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_5efd9082-8df1-4b1f-9059-dee762f9854e" xlink:to="loc_tixt_BaringPrivateEquityAsiaMember_a1dd518d-098c-4b41-a3e9-9902029f6396" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_6e5492bd-1da5-4abc-bb33-af285dbb27be" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_019e5147-1b99-4024-ac7a-0f62fc948cc1" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_0b03df8c-ef00-42a1-80ae-7e53f2aa48eb" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_019e5147-1b99-4024-ac7a-0f62fc948cc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_OrdinarySharesMember_aa295e3c-7654-4ef8-b620-ab7226988821" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_OrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_019e5147-1b99-4024-ac7a-0f62fc948cc1" xlink:to="loc_ifrs-full_OrdinarySharesMember_aa295e3c-7654-4ef8-b620-ab7226988821" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassAOrdinarySharesMember_017eb41a-1196-4e99-93ba-6778e545f280" xlink:href="tixt-20231231.xsd#tixt_ClassAOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OrdinarySharesMember_aa295e3c-7654-4ef8-b620-ab7226988821" xlink:to="loc_tixt_ClassAOrdinarySharesMember_017eb41a-1196-4e99-93ba-6778e545f280" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassCOrdinarySharesMember_a02fd88c-0c0c-4bae-973e-e4ee94255618" xlink:href="tixt-20231231.xsd#tixt_ClassCOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OrdinarySharesMember_aa295e3c-7654-4ef8-b620-ab7226988821" xlink:to="loc_tixt_ClassCOrdinarySharesMember_a02fd88c-0c0c-4bae-973e-e4ee94255618" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesMember_6308abf1-ebe7-44d4-a6d5-7cfeafafaeb5" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_OrdinarySharesMember_aa295e3c-7654-4ef8-b620-ab7226988821" xlink:to="loc_tixt_MultipleVotingSharesMember_6308abf1-ebe7-44d4-a6d5-7cfeafafaeb5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_877a581d-d500-4894-ba24-342fdc105f8d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_6e5492bd-1da5-4abc-bb33-af285dbb27be" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_877a581d-d500-4894-ba24-342fdc105f8d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_877a581d-d500-4894-ba24-342fdc105f8d_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_877a581d-d500-4894-ba24-342fdc105f8d" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_877a581d-d500-4894-ba24-342fdc105f8d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_fb5639c2-c2eb-4b05-9311-b7963d69784a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_877a581d-d500-4894-ba24-342fdc105f8d" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_fb5639c2-c2eb-4b05-9311-b7963d69784a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ManagedItServicesMember_0b14e3ff-0789-43e7-95a9-00c573ae0274" xlink:href="tixt-20231231.xsd#tixt_ManagedItServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_fb5639c2-c2eb-4b05-9311-b7963d69784a" xlink:to="loc_tixt_ManagedItServicesMember_0b14e3ff-0789-43e7-95a9-00c573ae0274" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_AmountReceivableRelatedPartyTransactionsReceivablePeriod_8c50905f-04e7-4b83-ad5e-037272dffbca" xlink:href="tixt-20231231.xsd#tixt_AmountReceivableRelatedPartyTransactionsReceivablePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_AmountReceivableRelatedPartyTransactionsReceivablePeriod_8c50905f-04e7-4b83-ad5e-037272dffbca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TermOfAgreementWithRelatedParties_742776e5-6a39-43c3-bdf0-997dc0c31e71" xlink:href="tixt-20231231.xsd#tixt_TermOfAgreementWithRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_TermOfAgreementWithRelatedParties_742776e5-6a39-43c3-bdf0-997dc0c31e71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MinimumAgreementAnnualSpendAmountWithRelatedParties_4fbdfd36-5b1e-4883-9808-6d39131860fd" xlink:href="tixt-20231231.xsd#tixt_MinimumAgreementAnnualSpendAmountWithRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_MinimumAgreementAnnualSpendAmountWithRelatedParties_4fbdfd36-5b1e-4883-9808-6d39131860fd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesIssued_874a1175-88af-4342-93a3-1397e97d1559" xlink:href="tixt-20231231.xsd#tixt_CommonSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_CommonSharesIssued_874a1175-88af-4342-93a3-1397e97d1559" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProceedsFromIssueOfOrdinaryShares_c6661cfa-f89d-4454-ade4-2f1d54a76373" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProceedsFromIssueOfOrdinaryShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_ProceedsFromIssueOfOrdinaryShares_c6661cfa-f89d-4454-ade4-2f1d54a76373" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable_98759dd5-5834-40fb-9dfc-e60864a972f0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_NumberOfInstrumentsOrInterestsIssuedOrIssuable_98759dd5-5834-40fb-9dfc-e60864a972f0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EquityInterestsOfAcquirer_2dae2ad0-34e0-4c56-a7a5-30b6ce083e58" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EquityInterestsOfAcquirer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_EquityInterestsOfAcquirer_2dae2ad0-34e0-4c56-a7a5-30b6ce083e58" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonShareSplitRatio_83454268-d511-48dd-bf1c-6a4350bdd659" xlink:href="tixt-20231231.xsd#tixt_CommonShareSplitRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_CommonShareSplitRatio_83454268-d511-48dd-bf1c-6a4350bdd659" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesConverted_8f26b8cd-64f5-43c3-89e3-0d0752574299" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_NumberOfSharesConverted_8f26b8cd-64f5-43c3-89e3-0d0752574299" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesSold_436ddeb2-5bfd-4d0d-b44c-081189e246b1" xlink:href="tixt-20231231.xsd#tixt_CommonSharesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_tixt_CommonSharesSold_436ddeb2-5bfd-4d0d-b44c-081189e246b1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents_474b91a6-45bb-4f54-803c-85c16299df12" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_PortionOfConsiderationPaidReceivedConsistingOfCashAndCashEquivalents_474b91a6-45bb-4f54-803c-85c16299df12" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_6cb7849b-abe6-429f-99b2-313dd5281629" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_IdentifiableAssetsAcquiredLiabilitiesAssumed_6cb7849b-abe6-429f-99b2-313dd5281629" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInGoodwill_5f07ec10-7204-437c-b3fa-54a29d7876fc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ChangesInGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_c315a3d0-9f5e-45dd-992c-e8e391516d75" xlink:to="loc_ifrs-full_ChangesInGoodwill_5f07ec10-7204-437c-b3fa-54a29d7876fc" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/RelatedpartytransactionsTransactionswithBaringPrivateEquityAsiaDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#RelatedpartytransactionsTransactionswithBaringPrivateEquityAsiaDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/RelatedpartytransactionsTransactionswithBaringPrivateEquityAsiaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_3d9c61ab-cfe5-4797-9020-df6b990ede13" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_3d9c61ab-cfe5-4797-9020-df6b990ede13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_987223cc-2289-44ef-8364-c8b18b2621f2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_3d9c61ab-cfe5-4797-9020-df6b990ede13" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_987223cc-2289-44ef-8364-c8b18b2621f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_987223cc-2289-44ef-8364-c8b18b2621f2_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_987223cc-2289-44ef-8364-c8b18b2621f2" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_987223cc-2289-44ef-8364-c8b18b2621f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_27fc0bc5-8587-4969-be7d-65a7f12c9bfd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_987223cc-2289-44ef-8364-c8b18b2621f2" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_27fc0bc5-8587-4969-be7d-65a7f12c9bfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_BaringPrivateEquityAsiaMember_0269c346-55bd-4807-ab0c-0624c21f3af7" xlink:href="tixt-20231231.xsd#tixt_BaringPrivateEquityAsiaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_27fc0bc5-8587-4969-be7d-65a7f12c9bfd" xlink:to="loc_tixt_BaringPrivateEquityAsiaMember_0269c346-55bd-4807-ab0c-0624c21f3af7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalAxis_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_3d9c61ab-cfe5-4797-9020-df6b990ede13" xlink:to="loc_ifrs-full_ClassesOfShareCapitalAxis_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ClassesOfShareCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ClassesOfShareCapitalAxis_26a37a8d-bf93-4555-a7d3-2c20b86a9cfd" xlink:to="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ClassBOrdinarySharesMember_3bd16983-0a23-4f85-846d-187cef0b0185" xlink:href="tixt-20231231.xsd#tixt_ClassBOrdinarySharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:to="loc_tixt_ClassBOrdinarySharesMember_3bd16983-0a23-4f85-846d-187cef0b0185" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesMember_5f3093af-f64f-4a96-9ab0-d4c11ee52995" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:to="loc_tixt_MultipleVotingSharesMember_5f3093af-f64f-4a96-9ab0-d4c11ee52995" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesIssuedInInitialPublicOfferingMember_f7aa812f-6545-419f-b462-189faa8bc4e1" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesIssuedInInitialPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:to="loc_tixt_MultipleVotingSharesIssuedInInitialPublicOfferingMember_f7aa812f-6545-419f-b462-189faa8bc4e1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_MultipleVotingSharesIssuedInSecondaryPublicOfferingMember_0a905b2a-c7e8-4241-8fad-dd573549a4c3" xlink:href="tixt-20231231.xsd#tixt_MultipleVotingSharesIssuedInSecondaryPublicOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ClassesOfShareCapitalMember_aa1308b9-8a8e-4805-86c4-4f80bc1c9cdc" xlink:to="loc_tixt_MultipleVotingSharesIssuedInSecondaryPublicOfferingMember_0a905b2a-c7e8-4241-8fad-dd573549a4c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BusinessCombinationsAxis_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BusinessCombinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_3d9c61ab-cfe5-4797-9020-df6b990ede13" xlink:to="loc_ifrs-full_BusinessCombinationsAxis_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_54db24e6-6514-4822-8ea2-a018713e50ec" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForBusinessCombinationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BusinessCombinationsAxis_a9ca9b02-038e-4e53-a3ef-5b109fa59d8a" xlink:to="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_54db24e6-6514-4822-8ea2-a018713e50ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CompetenceCallCenterMember_33b12fa4-ba3f-499a-bc83-50c609f2bc04" xlink:href="tixt-20231231.xsd#tixt_CompetenceCallCenterMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_54db24e6-6514-4822-8ea2-a018713e50ec" xlink:to="loc_tixt_CompetenceCallCenterMember_33b12fa4-ba3f-499a-bc83-50c609f2bc04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_LionbridgeAiMember_260be513-14d3-4514-8a3f-eeb7ce09dc92" xlink:href="tixt-20231231.xsd#tixt_LionbridgeAiMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForBusinessCombinationsMember_54db24e6-6514-4822-8ea2-a018713e50ec" xlink:to="loc_tixt_LionbridgeAiMember_260be513-14d3-4514-8a3f-eeb7ce09dc92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsReceivableRelatedPartyTransactions_9fdae0aa-4ee7-45ae-a24e-322be5259fdc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsReceivableRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_ifrs-full_AmountsReceivableRelatedPartyTransactions_9fdae0aa-4ee7-45ae-a24e-322be5259fdc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_af82e953-0e06-4665-8443-e5d31ab7b336" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_AmountsPayableRelatedPartyTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_ifrs-full_AmountsPayableRelatedPartyTransactions_af82e953-0e06-4665-8443-e5d31ab7b336" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesIssued_adab1750-1a4b-47fb-8548-86723e43dcaa" xlink:href="tixt-20231231.xsd#tixt_CommonSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_tixt_CommonSharesIssued_adab1750-1a4b-47fb-8548-86723e43dcaa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonShareSplitRatio_2713f241-a321-42a7-9be6-154c97aeaf3d" xlink:href="tixt-20231231.xsd#tixt_CommonShareSplitRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_tixt_CommonShareSplitRatio_2713f241-a321-42a7-9be6-154c97aeaf3d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfSharesConverted_44b48740-9c28-4ea6-a3b9-bbb9d7fa9a2c" xlink:href="tixt-20231231.xsd#tixt_NumberOfSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_tixt_NumberOfSharesConverted_44b48740-9c28-4ea6-a3b9-bbb9d7fa9a2c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_CommonSharesConverted_c8ee7d17-31c7-42c7-b137-dc3e73b70032" xlink:href="tixt-20231231.xsd#tixt_CommonSharesConverted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_tixt_CommonSharesConverted_c8ee7d17-31c7-42c7-b137-dc3e73b70032" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests_03ce367b-d716-4e9f-87a4-5b968d25fa56" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_15f7cea9-d61f-41d9-b610-b4ade920e94c" xlink:to="loc_ifrs-full_ProportionOfVotingRightsHeldByNoncontrollingInterests_03ce367b-d716-4e9f-87a4-5b968d25fa56" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/RelatedpartytransactionsTransactionswithkeymanagementpersonnelDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#RelatedpartytransactionsTransactionswithkeymanagementpersonnelDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/RelatedpartytransactionsTransactionswithkeymanagementpersonnelDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_494a24c5-9478-41e5-a538-b09817da3437" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_494a24c5-9478-41e5-a538-b09817da3437" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_494a24c5-9478-41e5-a538-b09817da3437_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_494a24c5-9478-41e5-a538-b09817da3437" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_494a24c5-9478-41e5-a538-b09817da3437_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0457c9df-cd3f-413d-823e-5c6579f8bc62" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_494a24c5-9478-41e5-a538-b09817da3437" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0457c9df-cd3f-413d-823e-5c6579f8bc62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_3e47c758-59c6-4dd8-9f2d-c5795748a8b4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_KeyManagementPersonnelOfEntityOrParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_0457c9df-cd3f-413d-823e-5c6579f8bc62" xlink:to="loc_ifrs-full_KeyManagementPersonnelOfEntityOrParentMember_3e47c758-59c6-4dd8-9f2d-c5795748a8b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_56c29293-4ffa-4db2-b0c4-ce2f505e4765" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:to="loc_srt_ConsolidatedEntitiesAxis_56c29293-4ffa-4db2-b0c4-ce2f505e4765" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_56c29293-4ffa-4db2-b0c4-ce2f505e4765_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_56c29293-4ffa-4db2-b0c4-ce2f505e4765" xlink:to="loc_srt_ConsolidatedEntitiesDomain_56c29293-4ffa-4db2-b0c4-ce2f505e4765_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_cce025b8-cc5a-4d22-a8d4-4f1bf2a051a4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_56c29293-4ffa-4db2-b0c4-ce2f505e4765" xlink:to="loc_srt_ConsolidatedEntitiesDomain_cce025b8-cc5a-4d22-a8d4-4f1bf2a051a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_fe6cc942-846a-4b1d-a213-2400f458b76a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_cce025b8-cc5a-4d22-a8d4-4f1bf2a051a4" xlink:to="loc_srt_ParentCompanyMember_fe6cc942-846a-4b1d-a213-2400f458b76a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_c2e8f246-ec6f-4b1d-b892-947483c8bc91" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TypesOfSharebasedPaymentArrangementsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:to="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_c2e8f246-ec6f-4b1d-b892-947483c8bc91" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_c2e8f246-ec6f-4b1d-b892-947483c8bc91_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_c2e8f246-ec6f-4b1d-b892-947483c8bc91" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_c2e8f246-ec6f-4b1d-b892-947483c8bc91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_SharebasedPaymentArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_TypesOfSharebasedPaymentArrangementsAxis_c2e8f246-ec6f-4b1d-b892-947483c8bc91" xlink:to="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_RestrictedStockUnitsMember_cff6505c-5d4b-4ea5-9c73-e1749ccdbc5f" xlink:href="tixt-20231231.xsd#tixt_RestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:to="loc_tixt_RestrictedStockUnitsMember_cff6505c-5d4b-4ea5-9c73-e1749ccdbc5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomPerformanceShareUnitsMember_d1d20901-eb9b-4ac3-bb61-da76849ff099" xlink:href="tixt-20231231.xsd#tixt_PhantomPerformanceShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:to="loc_tixt_PhantomPerformanceShareUnitsMember_d1d20901-eb9b-4ac3-bb61-da76849ff099" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusPhantomRestrictedShareMember_e00df9ae-1f1b-4f38-9bc6-f855412cd468" xlink:href="tixt-20231231.xsd#tixt_TelusPhantomRestrictedShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:to="loc_tixt_TelusPhantomRestrictedShareMember_e00df9ae-1f1b-4f38-9bc6-f855412cd468" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PhantomRestrictedShareUnitsMember_f5fc3796-97a9-4e9c-a85d-647787418515" xlink:href="tixt-20231231.xsd#tixt_PhantomRestrictedShareUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_SharebasedPaymentArrangementsMember_6af88420-ad6a-480d-9c05-29699720465b" xlink:to="loc_tixt_PhantomRestrictedShareUnitsMember_f5fc3796-97a9-4e9c-a85d-647787418515" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangeAxis_e9444310-5cc8-4d95-9cba-552786f4ee49" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesTable_0b9c5cac-42eb-4034-be21-182028871710" xlink:to="loc_ifrs-full_RangeAxis_e9444310-5cc8-4d95-9cba-552786f4ee49" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_e9444310-5cc8-4d95-9cba-552786f4ee49_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_RangeAxis_e9444310-5cc8-4d95-9cba-552786f4ee49" xlink:to="loc_ifrs-full_RangesMember_e9444310-5cc8-4d95-9cba-552786f4ee49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RangesMember_610cbee7-69da-43a4-9356-dd11a36fe29c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RangesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_RangeAxis_e9444310-5cc8-4d95-9cba-552786f4ee49" xlink:to="loc_ifrs-full_RangesMember_610cbee7-69da-43a4-9356-dd11a36fe29c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BottomOfRangeMember_cfec020a-916a-46db-b7ff-531b0abcac01" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BottomOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_610cbee7-69da-43a4-9356-dd11a36fe29c" xlink:to="loc_ifrs-full_BottomOfRangeMember_cfec020a-916a-46db-b7ff-531b0abcac01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_TopOfRangeMember_4a2faa35-e7a5-4326-844a-68d648f3942f" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_TopOfRangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_RangesMember_610cbee7-69da-43a4-9356-dd11a36fe29c" xlink:to="loc_ifrs-full_TopOfRangeMember_4a2faa35-e7a5-4326-844a-68d648f3942f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_d7db5cfe-94e6-44c6-ad20-5d1ea5ad255c" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ShorttermEmployeeBenefitsExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_ShorttermEmployeeBenefitsExpense_d7db5cfe-94e6-44c6-ad20-5d1ea5ad255c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_PostEmploymentPensionAndOtherBenefits_230bcfeb-bc13-4c4e-9784-8b358948c74c" xlink:href="tixt-20231231.xsd#tixt_PostEmploymentPensionAndOtherBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_tixt_PostEmploymentPensionAndOtherBenefits_230bcfeb-bc13-4c4e-9784-8b358948c74c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_0c6cd7b2-0f4d-4ee7-a015-55b74882ac98" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_KeyManagementPersonnelCompensationSharebasedPayment_0c6cd7b2-0f4d-4ee7-a015-55b74882ac98" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_af3d25ad-b17c-4bb4-92ad-4caed7300a70" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_NumberOfInstrumentsOtherEquityInstrumentsGranted_af3d25ad-b17c-4bb4-92ad-4caed7300a70" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_496df208-d5cc-4e12-a968-24f3dc66d0af" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement_496df208-d5cc-4e12-a968-24f3dc66d0af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted_b82015d3-07aa-47de-986d-a42ea20c861e" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGranted_b82015d3-07aa-47de-986d-a42ea20c861e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted_dce159ed-4ba3-484e-8448-44b6d44f02e5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_WeightedAverageFairValueAtMeasurementDateShareOptionsGranted_dce159ed-4ba3-484e-8448-44b6d44f02e5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_NumberOfInstrumentsGrantedInSharebasedPaymentArrangement_2eb45037-7bfa-46b5-8ebb-f67e3b0ca5bf" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_NumberOfInstrumentsGrantedInSharebasedPaymentArrangement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_NumberOfInstrumentsGrantedInSharebasedPaymentArrangement_2eb45037-7bfa-46b5-8ebb-f67e3b0ca5bf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_b5a1f6f4-c003-47c1-84ff-b94332ce42f3" xlink:href="tixt-20231231.xsd#tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_tixt_WeightedAverageFairValueAtMeasurementDateOtherEquityInstrumentsGrantedInPeriod_b5a1f6f4-c003-47c1-84ff-b94332ce42f3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ExercisePriceShareOptionsGranted2019_3fdc3557-2669-40f5-8343-341567eda880" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ExercisePriceShareOptionsGranted2019"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_ifrs-full_ExercisePriceShareOptionsGranted2019_3fdc3557-2669-40f5-8343-341567eda880" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_KeyManagerialPersonnelSeverancePaymentsNumberOfMonthsBaseSalaryConsidered_dc29f2c0-87b1-408c-92aa-a661971aa6be" xlink:href="tixt-20231231.xsd#tixt_KeyManagerialPersonnelSeverancePaymentsNumberOfMonthsBaseSalaryConsidered"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfTransactionsBetweenRelatedPartiesLineItems_6ac9f3ea-e2f4-4c64-b4e7-386c6aae3e4d" xlink:to="loc_tixt_KeyManagerialPersonnelSeverancePaymentsNumberOfMonthsBaseSalaryConsidered_dc29f2c0-87b1-408c-92aa-a661971aa6be" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/AdditionalfinancialinformationStatementsofincomeandothercomprehensiveincomeDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#AdditionalfinancialinformationStatementsofincomeandothercomprehensiveincomeDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/AdditionalfinancialinformationStatementsofincomeandothercomprehensiveincomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_76fb1d80-a754-414d-9e21-eb383059a6a3" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_99dba56d-c403-4116-bf46-622988f1f8f5" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_76fb1d80-a754-414d-9e21-eb383059a6a3" xlink:to="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_99dba56d-c403-4116-bf46-622988f1f8f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConcentrationsOfRiskAxis_7689cc31-b76f-4626-80ab-355dc64ba3d0" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ConcentrationsOfRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_99dba56d-c403-4116-bf46-622988f1f8f5" xlink:to="loc_ifrs-full_ConcentrationsOfRiskAxis_7689cc31-b76f-4626-80ab-355dc64ba3d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConcentrationsOfRiskMember_7689cc31-b76f-4626-80ab-355dc64ba3d0_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ConcentrationsOfRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_ConcentrationsOfRiskAxis_7689cc31-b76f-4626-80ab-355dc64ba3d0" xlink:to="loc_ifrs-full_ConcentrationsOfRiskMember_7689cc31-b76f-4626-80ab-355dc64ba3d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ConcentrationsOfRiskMember_d1ad27cc-c6a2-4bc3-ad2a-6895628a40ba" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ConcentrationsOfRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_ConcentrationsOfRiskAxis_7689cc31-b76f-4626-80ab-355dc64ba3d0" xlink:to="loc_ifrs-full_ConcentrationsOfRiskMember_d1ad27cc-c6a2-4bc3-ad2a-6895628a40ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OperatingRevenuesBenchmarkMember_8ffdc416-cf33-4faf-82b3-2ee20f9bd02f" xlink:href="tixt-20231231.xsd#tixt_OperatingRevenuesBenchmarkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ConcentrationsOfRiskMember_d1ad27cc-c6a2-4bc3-ad2a-6895628a40ba" xlink:to="loc_tixt_OperatingRevenuesBenchmarkMember_8ffdc416-cf33-4faf-82b3-2ee20f9bd02f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_073eb0c4-7ac4-4a96-8866-10b2a9177c18" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_CategoriesOfRelatedPartiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable_99dba56d-c403-4116-bf46-622988f1f8f5" xlink:to="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_073eb0c4-7ac4-4a96-8866-10b2a9177c18" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_073eb0c4-7ac4-4a96-8866-10b2a9177c18_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_073eb0c4-7ac4-4a96-8866-10b2a9177c18" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_073eb0c4-7ac4-4a96-8866-10b2a9177c18_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_8b61454b-f70f-40e6-883d-62c8bae64551" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_EntitysTotalForRelatedPartiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_CategoriesOfRelatedPartiesAxis_073eb0c4-7ac4-4a96-8866-10b2a9177c18" xlink:to="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_8b61454b-f70f-40e6-883d-62c8bae64551" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_SocialMediaCompanyMember_1896ee13-ae2e-4554-9778-266ae2be9229" xlink:href="tixt-20231231.xsd#tixt_SocialMediaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_8b61454b-f70f-40e6-883d-62c8bae64551" xlink:to="loc_tixt_SocialMediaCompanyMember_1896ee13-ae2e-4554-9778-266ae2be9229" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ParentMember_1a8c3735-0009-49e2-b33f-45dfa0c0d987" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_8b61454b-f70f-40e6-883d-62c8bae64551" xlink:to="loc_ifrs-full_ParentMember_1a8c3735-0009-49e2-b33f-45dfa0c0d987" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_GoogleMember_1a5cf03a-e425-4bdb-8471-85a23815fb7b" xlink:href="tixt-20231231.xsd#tixt_GoogleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_EntitysTotalForRelatedPartiesMember_8b61454b-f70f-40e6-883d-62c8bae64551" xlink:to="loc_tixt_GoogleMember_1a5cf03a-e425-4bdb-8471-85a23815fb7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_ConcentrationsOfRiskOperatingRevenuesNumberOfMajorCustomers_1ce4e77b-cbca-45ee-8a0f-8157c094e86e" xlink:href="tixt-20231231.xsd#tixt_ConcentrationsOfRiskOperatingRevenuesNumberOfMajorCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_76fb1d80-a754-414d-9e21-eb383059a6a3" xlink:to="loc_tixt_ConcentrationsOfRiskOperatingRevenuesNumberOfMajorCustomers_1ce4e77b-cbca-45ee-8a0f-8157c094e86e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IfrsConcentrationRiskPercentage_0b046643-19cc-4afd-a806-1d94d330dca1" xlink:href="tixt-20231231.xsd#tixt_IfrsConcentrationRiskPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems_76fb1d80-a754-414d-9e21-eb383059a6a3" xlink:to="loc_tixt_IfrsConcentrationRiskPercentage_0b046643-19cc-4afd-a806-1d94d330dca1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/AdditionalfinancialinformationChangesinliabilitiesarisingfromfinancingactivitiesDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#AdditionalfinancialinformationChangesinliabilitiesarisingfromfinancingactivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/AdditionalfinancialinformationChangesinliabilitiesarisingfromfinancingactivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems_ccf68a57-38fb-4617-a4c6-9e786463c815" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable_c78d6087-77c1-46a3-bede-4876a147b1e8" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems_ccf68a57-38fb-4617-a4c6-9e786463c815" xlink:to="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable_c78d6087-77c1-46a3-bede-4876a147b1e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameAxis_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable_c78d6087-77c1-46a3-bede-4876a147b1e8" xlink:to="loc_ifrs-full_BorrowingsByNameAxis_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6" xlink:to="loc_ifrs-full_BorrowingsByNameMember_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_BorrowingsByNameMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_BorrowingsByNameAxis_2a1880dd-bbe5-4467-b5e5-bfa54cfbeaa6" xlink:to="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_TelusInternationalCdaInc.CreditFacilityMember_31109eb4-0314-4b75-8e8b-d1c0405af7e2" xlink:href="tixt-20231231.xsd#tixt_TelusInternationalCdaInc.CreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:to="loc_tixt_TelusInternationalCdaInc.CreditFacilityMember_31109eb4-0314-4b75-8e8b-d1c0405af7e2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DebtAssumedFromAcquisitionsMember_833844d2-6705-4739-9ccc-341d97c74158" xlink:href="tixt-20231231.xsd#tixt_DebtAssumedFromAcquisitionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:to="loc_tixt_DebtAssumedFromAcquisitionsMember_833844d2-6705-4739-9ccc-341d97c74158" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LeaseLiabilitiesMember_b1ef9e39-ed47-4a1b-bfd4-47a16ec55ab2" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LeaseLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:to="loc_ifrs-full_LeaseLiabilitiesMember_b1ef9e39-ed47-4a1b-bfd4-47a16ec55ab2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_DeferredDebtTransactionCostsMember_42d35b58-15be-4404-b8d6-b5e57deb3601" xlink:href="tixt-20231231.xsd#tixt_DeferredDebtTransactionCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_BorrowingsByNameMember_6da101a7-db01-4105-b8d3-94e99116d1d4" xlink:to="loc_tixt_DeferredDebtTransactionCostsMember_42d35b58-15be-4404-b8d6-b5e57deb3601" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_2e060b3d-0a30-4acb-8d33-c78e933ca919" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable_c78d6087-77c1-46a3-bede-4876a147b1e8" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_2e060b3d-0a30-4acb-8d33-c78e933ca919" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_2e060b3d-0a30-4acb-8d33-c78e933ca919_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_2e060b3d-0a30-4acb-8d33-c78e933ca919" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_2e060b3d-0a30-4acb-8d33-c78e933ca919_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_fcafbf28-6ac3-4af3-94d1-1bbc57e76c4a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesAxis_2e060b3d-0a30-4acb-8d33-c78e933ca919" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_fcafbf28-6ac3-4af3-94d1-1bbc57e76c4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LongtermBorrowingsMember_570894e2-4cce-43f0-a1a0-bece517fd2fc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LongtermBorrowingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_LiabilitiesArisingFromFinancingActivitiesMember_fcafbf28-6ac3-4af3-94d1-1bbc57e76c4a" xlink:to="loc_ifrs-full_LongtermBorrowingsMember_570894e2-4cce-43f0-a1a0-bece517fd2fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_44c694e6-6649-443f-a6f5-3d153d8e6911" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesTable_c78d6087-77c1-46a3-bede-4876a147b1e8" xlink:to="loc_srt_RestatementAxis_44c694e6-6649-443f-a6f5-3d153d8e6911" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_44c694e6-6649-443f-a6f5-3d153d8e6911_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_44c694e6-6649-443f-a6f5-3d153d8e6911" xlink:to="loc_srt_RestatementDomain_44c694e6-6649-443f-a6f5-3d153d8e6911_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_943132f8-3b8e-4153-8267-e5af35bb2bd4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_44c694e6-6649-443f-a6f5-3d153d8e6911" xlink:to="loc_srt_RestatementDomain_943132f8-3b8e-4153-8267-e5af35bb2bd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_10f13151-2af1-47a2-84df-4222d55111b5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_943132f8-3b8e-4153-8267-e5af35bb2bd4" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_10f13151-2af1-47a2-84df-4222d55111b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfReconciliationOfLiabilitiesArisingFromFinancingActivitiesLineItems_ccf68a57-38fb-4617-a4c6-9e786463c815" xlink:to="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_e8494901-e583-4c47-8e46-17d882398c31" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:to="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_e8494901-e583-4c47-8e46-17d882398c31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseIssuingOrReceivingLiabilitiesArisingFromFinancingActivities_b52d91ab-6119-4aa2-9273-96b53fbfd2e7" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseIssuingOrReceivingLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:to="loc_tixt_IncreaseDecreaseIssuingOrReceivingLiabilitiesArisingFromFinancingActivities_b52d91ab-6119-4aa2-9273-96b53fbfd2e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_IncreaseDecreaseThroughFinancingRedemptionsRepaymentsOrPaymentsLiabilitiesArisingFromFinancingActivities_6f59a8f1-3402-4199-9527-9e756fcba40c" xlink:href="tixt-20231231.xsd#tixt_IncreaseDecreaseThroughFinancingRedemptionsRepaymentsOrPaymentsLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:to="loc_tixt_IncreaseDecreaseThroughFinancingRedemptionsRepaymentsOrPaymentsLiabilitiesArisingFromFinancingActivities_6f59a8f1-3402-4199-9527-9e756fcba40c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_714cb22f-6b2b-4f09-884a-8911d9288bf9" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughEffectOfChangesInForeignExchangeRatesLiabilitiesArisingFromFinancingActivities_714cb22f-6b2b-4f09-884a-8911d9288bf9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities_f322c2fd-ffe7-4d45-b31b-193956b88560" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_ChangesInLiabilitiesArisingFromFinancingActivitiesAbstract_a898e862-5a02-44eb-9ae3-043399edbc90" xlink:to="loc_ifrs-full_IncreaseDecreaseThroughOtherChangesLiabilitiesArisingFromFinancingActivities_f322c2fd-ffe7-4d45-b31b-193956b88560" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_LiabilitiesArisingFromFinancingActivities_beb3ae7e-c864-40aa-b680-a166996332bc" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_LiabilitiesArisingFromFinancingActivities"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.telusinternational.com/role/SegmentinformationGeographicalinformationDetails" xlink:type="simple" xlink:href="tixt-20231231.xsd#SegmentinformationGeographicalinformationDetails"/>
  <link:definitionLink xlink:role="http://www.telusinternational.com/role/SegmentinformationGeographicalinformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfGeographicalAreasLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_DisclosureOfGeographicalAreasTable_8fd191a9-205b-4875-ba2f-52094df05b8a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_DisclosureOfGeographicalAreasTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:to="loc_ifrs-full_DisclosureOfGeographicalAreasTable_8fd191a9-205b-4875-ba2f-52094df05b8a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasAxis_ef88022d-b144-4055-b4ea-394ee1693a0a" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasTable_8fd191a9-205b-4875-ba2f-52094df05b8a" xlink:to="loc_ifrs-full_GeographicalAreasAxis_ef88022d-b144-4055-b4ea-394ee1693a0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember_ef88022d-b144-4055-b4ea-394ee1693a0a_default" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_ifrs-full_GeographicalAreasAxis_ef88022d-b144-4055-b4ea-394ee1693a0a" xlink:to="loc_ifrs-full_GeographicalAreasMember_ef88022d-b144-4055-b4ea-394ee1693a0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_GeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_ifrs-full_GeographicalAreasAxis_ef88022d-b144-4055-b4ea-394ee1693a0a" xlink:to="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_a542d93e-1fdf-4b82-9be6-e8ffe1dd1371" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_US_a542d93e-1fdf-4b82-9be6-e8ffe1dd1371" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_PH_49454a10-1ea0-4656-9c5a-9c74a245573f" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_PH"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_PH_49454a10-1ea0-4656-9c5a-9c74a245573f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_CA_be2a75f8-84c0-4697-ac1a-717955834133" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_CA_be2a75f8-84c0-4697-ac1a-717955834133" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GT_387106c9-6df6-4890-aafd-79fbfed62f8f" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_GT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_GT_387106c9-6df6-4890-aafd-79fbfed62f8f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_DE_3d653e57-822b-47e9-9967-407eafd9596e" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_DE"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_DE_3d653e57-822b-47e9-9967-407eafd9596e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_SV_60ab8d29-aad8-4d33-82dd-e39bac23b405" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_SV"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_SV_60ab8d29-aad8-4d33-82dd-e39bac23b405" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_ES_2093855c-248d-49dd-b75a-e09f232d953a" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_ES"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_ES_2093855c-248d-49dd-b75a-e09f232d953a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BG_b7eec181-7882-4c4b-9e63-ca80758ae35f" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_BG"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_BG_b7eec181-7882-4c4b-9e63-ca80758ae35f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IN_9b87b74a-b510-4326-8896-9e92b8272c6b" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_IN"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_country_IN_9b87b74a-b510-4326-8896-9e92b8272c6b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OtherGeographicalAreasMember_416e783a-dbae-45d3-9480-006742608f6d" xlink:href="tixt-20231231.xsd#tixt_OtherGeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_tixt_OtherGeographicalAreasMember_416e783a-dbae-45d3-9480-006742608f6d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OtherGeographicalAreasOutsideOfCanadaMember_0ec79231-5997-462b-a501-5364f16042b2" xlink:href="tixt-20231231.xsd#tixt_OtherGeographicalAreasOutsideOfCanadaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_GeographicalAreasMember_d27a009d-93b4-494f-b1ce-4730c3016492" xlink:to="loc_tixt_OtherGeographicalAreasOutsideOfCanadaMember_0ec79231-5997-462b-a501-5364f16042b2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_OperatingSegmentsNumber_35a3f66d-c51d-4bc6-833a-872f58ac2f82" xlink:href="tixt-20231231.xsd#tixt_OperatingSegmentsNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:to="loc_tixt_OperatingSegmentsNumber_35a3f66d-c51d-4bc6-833a-872f58ac2f82" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NumberOfReportingSegments_956c2c5d-26b3-4e05-a71c-9ca501da1e6f" xlink:href="tixt-20231231.xsd#tixt_NumberOfReportingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:to="loc_tixt_NumberOfReportingSegments_956c2c5d-26b3-4e05-a71c-9ca501da1e6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ifrs-full_RevenueFromContractsWithCustomers_fad4cb5b-6e37-454e-aa6e-6f7f2bd3b117" xlink:href="https://xbrl.ifrs.org/taxonomy/2023-03-23/full_ifrs/full_ifrs-cor_2023-03-23.xsd#ifrs-full_RevenueFromContractsWithCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:to="loc_ifrs-full_RevenueFromContractsWithCustomers_fad4cb5b-6e37-454e-aa6e-6f7f2bd3b117" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_tixt_NetLongLivedAssets_04c9b9c5-890f-408d-8218-6763a383fb9d" xlink:href="tixt-20231231.xsd#tixt_NetLongLivedAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_ifrs-full_DisclosureOfGeographicalAreasLineItems_09e6068b-d142-440e-b9a8-9e3d6850e3da" xlink:to="loc_tixt_NetLongLivedAssets_04c9b9c5-890f-408d-8218-6763a383fb9d" xlink:type="arc" order="3"/>
  </link:definitionLink>
</link:linkbase>
