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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cbeb4-db77-7c0a-90fc-df882aaadb56,g:0310b899-3a44-4ec1-baff-71c654f4e391-->
<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.genesisenergy.com/role/Cover" xlink:type="simple" xlink:href="gel-20260331.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019cbeb4-dca6-7e4b-a4a8-8372bd660700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019cbeb4-dca6-7e4b-a4a8-8372bd660700" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dca6-78b1-ad43-c7d99c569e27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019cbeb4-dca6-7e4b-a4a8-8372bd660700" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dca6-78b1-ad43-c7d99c569e27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-78b1-ad43-c7d99c569e27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dca6-78b1-ad43-c7d99c569e27" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-78b1-ad43-c7d99c569e27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-7438-8342-4dabbfec2f2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dca6-78b1-ad43-c7d99c569e27" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-7438-8342-4dabbfec2f2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019cbeb4-dca6-7f9b-afac-0234b8d86ee8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-7438-8342-4dabbfec2f2a" xlink:to="loc_us-gaap_CommonClassAMember_019cbeb4-dca6-7f9b-afac-0234b8d86ee8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019cbeb4-dca6-7582-aa41-d7904bf66833" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dca6-7438-8342-4dabbfec2f2a" xlink:to="loc_us-gaap_CommonClassBMember_019cbeb4-dca6-7582-aa41-d7904bf66833" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-720e-9317-995d5c9e79c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019cbeb4-dca6-7e4b-a4a8-8372bd660700" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-720e-9317-995d5c9e79c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720e-9317-995d5c9e79c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-720e-9317-995d5c9e79c4" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720e-9317-995d5c9e79c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720b-a9b1-966428e7c5cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-720e-9317-995d5c9e79c4" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720b-a9b1-966428e7c5cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_019cbeb4-dca6-79a0-b56b-b483cc9b68e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720b-a9b1-966428e7c5cd" xlink:to="loc_us-gaap_LimitedPartnerMember_019cbeb4-dca6-79a0-b56b-b483cc9b68e1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019cbeb4-dca6-7046-9c44-345b2318816b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720b-a9b1-966428e7c5cd" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019cbeb4-dca6-7046-9c44-345b2318816b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cbeb4-dca6-73a8-b86c-4da39341e743" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-720b-a9b1-966428e7c5cd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cbeb4-dca6-73a8-b86c-4da39341e743" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-75e3-8f08-9c313af84fa1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019cbeb4-dca6-7e4b-a4a8-8372bd660700" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-75e3-8f08-9c313af84fa1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-75e3-8f08-9c313af84fa1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-75e3-8f08-9c313af84fa1" xlink:to="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-75e3-8f08-9c313af84fa1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-72ca-a565-2e46be638ef2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-75e3-8f08-9c313af84fa1" xlink:to="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-72ca-a565-2e46be638ef2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CommonUnitsMember_019cbeb4-dca6-7334-95fc-27793b44dc40" xlink:href="gel-20260331.xsd#gel_CommonUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-72ca-a565-2e46be638ef2" xlink:to="loc_gel_CommonUnitsMember_019cbeb4-dca6-7334-95fc-27793b44dc40" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019cbeb4-dca6-736d-afa8-d2e8948474db" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentType_019cbeb4-dca6-736d-afa8-d2e8948474db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019cbeb4-dca6-71ff-a670-9c6443f52033" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentQuarterlyReport_019cbeb4-dca6-71ff-a670-9c6443f52033" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019cbeb4-dca6-7995-b068-6aa9558af107" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentPeriodEndDate_019cbeb4-dca6-7995-b068-6aa9558af107" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019cbeb4-dca6-7094-9a3e-83a526ea6c75" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentTransitionReport_019cbeb4-dca6-7094-9a3e-83a526ea6c75" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019cbeb4-dca6-75da-8a52-cd6792573665" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityFileNumber_019cbeb4-dca6-75da-8a52-cd6792573665" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019cbeb4-dca6-7224-9243-6e0178cd6b79" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityRegistrantName_019cbeb4-dca6-7224-9243-6e0178cd6b79" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019cbeb4-dca6-7073-a1ed-3129807ea6e5" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019cbeb4-dca6-7073-a1ed-3129807ea6e5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019cbeb4-dca6-7ff6-826c-ef6e86332439" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityTaxIdentificationNumber_019cbeb4-dca6-7ff6-826c-ef6e86332439" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019cbeb4-dca6-7306-ac22-1a39ec6149e6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityAddressAddressLine1_019cbeb4-dca6-7306-ac22-1a39ec6149e6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019cbeb4-dca6-7f27-85c0-e893144beedc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityAddressCityOrTown_019cbeb4-dca6-7f27-85c0-e893144beedc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019cbeb4-dca6-7c12-81d1-7d706f8fe573" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityAddressStateOrProvince_019cbeb4-dca6-7c12-81d1-7d706f8fe573" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019cbeb4-dca6-7d0b-ba58-056bc7a11dc7" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityAddressPostalZipCode_019cbeb4-dca6-7d0b-ba58-056bc7a11dc7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019cbeb4-dca6-7b19-8369-9e62bc0563a3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_CityAreaCode_019cbeb4-dca6-7b19-8369-9e62bc0563a3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019cbeb4-dca6-7d51-8f47-519265620074" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_LocalPhoneNumber_019cbeb4-dca6-7d51-8f47-519265620074" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019cbeb4-dca6-7c92-bec8-3e63d3e4a193" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_Security12bTitle_019cbeb4-dca6-7c92-bec8-3e63d3e4a193" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019cbeb4-dca6-76ca-a3f3-0436ef50c739" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_TradingSymbol_019cbeb4-dca6-76ca-a3f3-0436ef50c739" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019cbeb4-dca6-7b2c-b5ff-fdbca153ef2d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_SecurityExchangeName_019cbeb4-dca6-7b2c-b5ff-fdbca153ef2d" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019cbeb4-dca6-70a4-b549-5b4ce383a870" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityCurrentReportingStatus_019cbeb4-dca6-70a4-b549-5b4ce383a870" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019cbeb4-dca6-79c6-b4cb-41c365aab0e2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityInteractiveDataCurrent_019cbeb4-dca6-79c6-b4cb-41c365aab0e2" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019cbeb4-dca6-7433-8ad1-5fb1a0e9d59a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityFilerCategory_019cbeb4-dca6-7433-8ad1-5fb1a0e9d59a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019cbeb4-dca6-7ce0-84bb-6df69c75359d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntitySmallBusiness_019cbeb4-dca6-7ce0-84bb-6df69c75359d" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019cbeb4-dca6-7cac-8b7d-4d134e4f82db" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityEmergingGrowthCompany_019cbeb4-dca6-7cac-8b7d-4d134e4f82db" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019cbeb4-dca6-76ea-9c8a-edb9b850536e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityShellCompany_019cbeb4-dca6-76ea-9c8a-edb9b850536e" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019cbeb4-dca6-7972-a2e4-468b44943903" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019cbeb4-dca6-7972-a2e4-468b44943903" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019cbeb4-dca6-7e95-9a7a-adbbe15ac1fd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_EntityCentralIndexKey_019cbeb4-dca6-7e95-9a7a-adbbe15ac1fd" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019cbeb4-dca6-7fa5-8d49-d61f7fc77fea" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_CurrentFiscalYearEndDate_019cbeb4-dca6-7fa5-8d49-d61f7fc77fea" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019cbeb4-dca6-758b-816e-dd972f11fe90" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentFiscalYearFocus_019cbeb4-dca6-758b-816e-dd972f11fe90" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019cbeb4-dca6-7191-a0cf-7616b079fd5f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019cbeb4-dca6-7191-a0cf-7616b079fd5f" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019cbeb4-dca6-75c3-978c-eade9e742135" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cbeb4-dca6-775d-a6b1-c40ca4ed7142" xlink:to="loc_dei_AmendmentFlag_019cbeb4-dca6-75c3-978c-eade9e742135" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="simple" xlink:href="gel-20260331.xsd#UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019dd5d1-5382-7b5e-b99a-8318f0fd1e5b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:to="loc_us-gaap_StatementTable_019dd5d1-5382-7b5e-b99a-8318f0fd1e5b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019dd5d1-5382-7183-8cae-d393998acae6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019dd5d1-5382-7b5e-b99a-8318f0fd1e5b" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019dd5d1-5382-7183-8cae-d393998acae6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019dd5d1-5382-7183-8cae-d393998acae6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019dd5d1-5382-7183-8cae-d393998acae6" xlink:to="loc_us-gaap_ClassOfStockDomain_019dd5d1-5382-7183-8cae-d393998acae6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019dd5d1-5382-7032-957d-cb74f0fb5d59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019dd5d1-5382-7183-8cae-d393998acae6" xlink:to="loc_us-gaap_ClassOfStockDomain_019dd5d1-5382-7032-957d-cb74f0fb5d59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_019dd5d1-5382-7862-9c96-94649d5a8df1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019dd5d1-5382-7032-957d-cb74f0fb5d59" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_019dd5d1-5382-7862-9c96-94649d5a8df1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesOutstanding_019dd5d1-5382-7dab-b65e-9bf777c99548" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:to="loc_us-gaap_TemporaryEquitySharesOutstanding_019dd5d1-5382-7dab-b65e-9bf777c99548" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquitySharesIssued_019dd5d1-5382-7fcd-86db-40cf76bacaf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquitySharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:to="loc_us-gaap_TemporaryEquitySharesIssued_019dd5d1-5382-7fcd-86db-40cf76bacaf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsIssued_019dd5d1-5382-721b-915f-d128fedb8c76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountUnitsIssued_019dd5d1-5382-721b-915f-d128fedb8c76" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_019dd5d1-5382-7b7d-9933-5eebbfed33a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019dd5d1-5382-728d-8c81-3e1e78af87a8" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_019dd5d1-5382-7b7d-9933-5eebbfed33a5" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="simple" xlink:href="gel-20260331.xsd#UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cbeb4-dca6-71c8-87ef-f51e7b549592" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_StatementTable_019cbeb4-dca6-71c8-87ef-f51e7b549592" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dca6-7a88-8fdb-2afde493232e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cbeb4-dca6-71c8-87ef-f51e7b549592" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dca6-7a88-8fdb-2afde493232e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dca6-7a88-8fdb-2afde493232e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dca6-7a88-8fdb-2afde493232e" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dca6-7a88-8fdb-2afde493232e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dca6-737a-bd0d-ef961da5d6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dca6-7a88-8fdb-2afde493232e" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dca6-737a-bd0d-ef961da5d6a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dca6-73f0-ad3e-4ca52396c392" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dca6-737a-bd0d-ef961da5d6a5" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dca6-73f0-ad3e-4ca52396c392" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dca6-7907-9393-2a5bcccfa89c" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dca6-737a-bd0d-ef961da5d6a5" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dca6-7907-9393-2a5bcccfa89c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dca6-7659-b197-8298ff807c28" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dca6-737a-bd0d-ef961da5d6a5" xlink:to="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dca6-7659-b197-8298ff807c28" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cbeb4-dca6-71c8-87ef-f51e7b549592" xlink:to="loc_srt_ProductOrServiceAxis_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dca6-7bba-a90c-7b2e2bc6b301" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationRevenueMember_019cbeb4-dca6-765f-84ec-088b9e95115e" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:to="loc_gel_OffshorePipelineTransportationRevenueMember_019cbeb4-dca6-765f-84ec-088b9e95115e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationRevenueMember_019cbeb4-dca6-74ca-96b4-fa8cc8090cba" xlink:href="gel-20260331.xsd#gel_MarineTransportationRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:to="loc_gel_MarineTransportationRevenueMember_019cbeb4-dca6-74ca-96b4-fa8cc8090cba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesAndTransportationRevenueMember_019cbeb4-dca6-7a07-8b2a-6283206723fe" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesAndTransportationRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:to="loc_gel_OnshoreFacilitiesAndTransportationRevenueMember_019cbeb4-dca6-7a07-8b2a-6283206723fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesAndTransportationProductMember_019cbeb4-dca6-74a2-9cb9-5138afc84126" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesAndTransportationProductMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:to="loc_gel_OnshoreFacilitiesAndTransportationProductMember_019cbeb4-dca6-74a2-9cb9-5138afc84126" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesMember_019cbeb4-dca6-7b4c-82a8-8bc3f7137be2" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dca6-7761-98a4-654f074b6ae8" xlink:to="loc_gel_OnshoreTransportationAndServicesMember_019cbeb4-dca6-7b4c-82a8-8bc3f7137be2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dca6-711c-b597-e101d27cf5ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cbeb4-dca6-71c8-87ef-f51e7b549592" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dca6-711c-b597-e101d27cf5ec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dca6-711c-b597-e101d27cf5ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dca6-711c-b597-e101d27cf5ec" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dca6-711c-b597-e101d27cf5ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dca6-70a5-9e41-91235cbc1f56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dca6-711c-b597-e101d27cf5ec" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dca6-70a5-9e41-91235cbc1f56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_019cbeb4-dca6-7338-bb99-b1c3f0ba5a17" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_RevenuesAbstract_019cbeb4-dca6-7338-bb99-b1c3f0ba5a17" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dca6-7c7b-989b-540f11bbae30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_019cbeb4-dca6-7338-bb99-b1c3f0ba5a17" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dca6-7c7b-989b-540f11bbae30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019cbeb4-dca6-7905-a511-e857e22c4788" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019cbeb4-dca6-7905-a511-e857e22c4788" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_019cbeb4-dca6-7196-b302-a2134f87caeb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_019cbeb4-dca6-7196-b302-a2134f87caeb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherDepreciationAndAmortization_019cbeb4-dca6-7eea-b820-bbd9254edd5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:to="loc_us-gaap_OtherDepreciationAndAmortization_019cbeb4-dca6-7eea-b820-bbd9254edd5d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_019cbeb4-dca6-71f4-8ef0-f7351a22f512" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_019cbeb4-dca6-791f-a7f4-2295aaead57b" xlink:to="loc_us-gaap_CostsAndExpenses_019cbeb4-dca6-71f4-8ef0-f7351a22f512" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019cbeb4-dca6-7d9b-8d2b-ef4426c74198" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_OperatingIncomeLoss_019cbeb4-dca6-7d9b-8d2b-ef4426c74198" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cbeb4-dca6-7744-a3b0-5e397af9a40b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_019cbeb4-dca6-7744-a3b0-5e397af9a40b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNet_019cbeb4-dca6-7007-9f4f-fd437b2f9cde" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_InterestIncomeExpenseNet_019cbeb4-dca6-7007-9f4f-fd437b2f9cde" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019cbeb4-dca6-7edd-b412-15217e5fd1d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019cbeb4-dca6-7edd-b412-15217e5fd1d6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cbeb4-dca6-73c3-9197-9c9608adc4e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019cbeb4-dca6-73c3-9197-9c9608adc4e2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019cbeb4-dca6-77f4-85a8-54f102141d52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019cbeb4-dca6-77f4-85a8-54f102141d52" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019cbeb4-dca6-7cf0-a5e3-75c1026d80aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_019cbeb4-dca6-7cf0-a5e3-75c1026d80aa" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntityAbstract_019cbeb4-dca6-7b6c-90ed-7603e0d4c5f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntityAbstract_019cbeb4-dca6-7b6c-90ed-7603e0d4c5f4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_019cbeb4-dca6-7c74-beb5-7c3cda0c6b32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntityAbstract_019cbeb4-dca6-7b6c-90ed-7603e0d4c5f4" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_019cbeb4-dca6-7c74-beb5-7c3cda0c6b32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_019cbeb4-dca6-7e60-848f-0fcb42559ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntityAbstract_019cbeb4-dca6-7b6c-90ed-7603e0d4c5f4" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax_019cbeb4-dca6-7e60-848f-0fcb42559ab0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_019cbeb4-dca6-7057-9d63-a14c29b8ba1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_019cbeb4-dca6-7057-9d63-a14c29b8ba1c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019cbeb4-dca6-7fb1-94ea-d8c438cb66bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_ProfitLoss_019cbeb4-dca6-7fb1-94ea-d8c438cb66bc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_019cbeb4-dca6-7122-8ae8-f253bb085534" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_NetIncomeLossAttributableToNonredeemableNoncontrollingInterest_019cbeb4-dca6-7122-8ae8-f253bb085534" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019cbeb4-dca6-75c5-b63d-d722e24ccd6b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_NetIncomeLoss_019cbeb4-dca6-75c5-b63d-d722e24ccd6b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders_019cbeb4-dca6-717d-b611-841376ad3ab9" xlink:href="gel-20260331.xsd#gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders_019cbeb4-dca6-717d-b611-841376ad3ab9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cbeb4-dca6-7615-ba31-bcb4dcdfcbce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019cbeb4-dca6-7615-ba31-bcb4dcdfcbce" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cbeb4-dca6-7087-87c0-51ac0141d6c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_019cbeb4-dca6-7087-87c0-51ac0141d6c7" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_019cbeb4-dca6-7e42-8bc9-429513b09336" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_019cbeb4-dca6-7e42-8bc9-429513b09336" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_019cbeb4-dca6-7cf0-b662-aed086718cfc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_019cbeb4-dca6-7cf0-b662-aed086718cfc" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019cbeb4-dca6-72a6-93be-5090a04ab87d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_EarningsPerShareBasic_019cbeb4-dca6-72a6-93be-5090a04ab87d" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019cbeb4-dca6-7be1-ac25-d0fc49c39b34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019cbeb4-dca6-7be1-ac25-d0fc49c39b34" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerUnitAbstract_019cbeb4-dca6-7842-8933-03509212e1f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerUnitAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7e39-bc6c-51d32b66bdbb" xlink:to="loc_us-gaap_EarningsPerUnitAbstract_019cbeb4-dca6-7842-8933-03509212e1f3" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cbeb4-dca6-7a0e-b2cc-25e53b8d7f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerUnitAbstract_019cbeb4-dca6-7842-8933-03509212e1f3" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019cbeb4-dca6-7a0e-b2cc-25e53b8d7f8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cbeb4-dca6-78b3-94c5-285b60530cb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerUnitAbstract_019cbeb4-dca6-7842-8933-03509212e1f3" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019cbeb4-dca6-78b3-94c5-285b60530cb8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFPARTNERSCAPITAL" xlink:type="simple" xlink:href="gel-20260331.xsd#UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFPARTNERSCAPITAL"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/UNAUDITEDCONDENSEDCONSOLIDATEDSTATEMENTSOFPARTNERSCAPITAL" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7745-ac61-8f26e0c3d505" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019cbeb4-dca6-72a0-aff2-8eee4b447d1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7745-ac61-8f26e0c3d505" xlink:to="loc_us-gaap_StatementTable_019cbeb4-dca6-72a0-aff2-8eee4b447d1c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cbeb4-dca6-72a0-aff2-8eee4b447d1c" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-7a05-8d9d-9cca81127b77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dca6-76d6-8bcf-55f40d5c6de5" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-7a05-8d9d-9cca81127b77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_019cbeb4-dca6-7962-85a0-fa8959ce7c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-7a05-8d9d-9cca81127b77" xlink:to="loc_us-gaap_LimitedPartnerMember_019cbeb4-dca6-7962-85a0-fa8959ce7c8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019cbeb4-dca6-7f51-b05b-7aa433355c29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-7a05-8d9d-9cca81127b77" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019cbeb4-dca6-7f51-b05b-7aa433355c29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cbeb4-dca6-7471-b5cd-616c57a8e350" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dca6-7a05-8d9d-9cca81127b77" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019cbeb4-dca6-7471-b5cd-616c57a8e350" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-708a-a480-399753548705" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019cbeb4-dca6-72a0-aff2-8eee4b447d1c" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-708a-a480-399753548705" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-708a-a480-399753548705_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-708a-a480-399753548705" xlink:to="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-708a-a480-399753548705_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-7b9a-882e-8b56b47cfd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019cbeb4-dca6-708a-a480-399753548705" xlink:to="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-7b9a-882e-8b56b47cfd2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CommonUnitsMember_019cbeb4-dca6-76d5-bba1-eec473125f92" xlink:href="gel-20260331.xsd#gel_CommonUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019cbeb4-dca6-7b9a-882e-8b56b47cfd2b" xlink:to="loc_gel_CommonUnitsMember_019cbeb4-dca6-76d5-bba1-eec473125f92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPartnersCapitalRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019cbeb4-dca6-7745-ac61-8f26e0c3d505" xlink:to="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountUnits_019cbeb4-dca6-7b93-8fa7-39e61be66f2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_PartnersCapitalAccountUnits_019cbeb4-dca6-7b93-8fa7-39e61be66f2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_019cbeb4-dca6-71ea-b159-989c0142156d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_019cbeb4-dca6-71ea-b159-989c0142156d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingPreferredUnitHoldersRedeemable_019cbeb4-dca6-7d12-b18b-a5b7a26f0597" xlink:href="gel-20260331.xsd#gel_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingPreferredUnitHoldersRedeemable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_gel_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestExcludingPreferredUnitHoldersRedeemable_019cbeb4-dca6-7d12-b18b-a5b7a26f0597" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountDistributions_019cbeb4-dca6-70ad-8f5c-8025db6794e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountDistributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_PartnersCapitalAccountDistributions_019cbeb4-dca6-70ad-8f5c-8025db6794e3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019cbeb4-dca6-73e5-b299-231f387cdefe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019cbeb4-dca6-73e5-b299-231f387cdefe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019cbeb4-dca6-7a66-be6c-d984f039bffd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance_019cbeb4-dca6-7a66-be6c-d984f039bffd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_NoncontrollingInterestIncreaseFromNonCashContribution_019dd5dd-2717-750e-b741-e091551f06dd" xlink:href="gel-20260331.xsd#gel_NoncontrollingInterestIncreaseFromNonCashContribution"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_gel_NoncontrollingInterestIncreaseFromNonCashContribution_019dd5dd-2717-750e-b741-e091551f06dd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019cbeb4-dca6-7ade-b9ba-5b712325b1a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019cbeb4-dca6-7ade-b9ba-5b712325b1a5" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DisposalOfBenefitPlanDiscontinuedOperations_019cbeb4-dca6-753f-8e54-cb96c1e86211" xlink:href="gel-20260331.xsd#gel_DisposalOfBenefitPlanDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_gel_DisposalOfBenefitPlanDiscontinuedOperations_019cbeb4-dca6-753f-8e54-cb96c1e86211" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PartnersCapitalAccountDistributionsToPreferredUnitholders_019cbeb4-dca6-7ba4-aef6-bcd5bde980f5" xlink:href="gel-20260331.xsd#gel_PartnersCapitalAccountDistributionsToPreferredUnitholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInPartnersCapitalRollForward_019cbeb4-dca6-7d1e-ad9b-0ffe0bb5bf26" xlink:to="loc_gel_PartnersCapitalAccountDistributionsToPreferredUnitholders_019cbeb4-dca6-7ba4-aef6-bcd5bde980f5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountUnits_019cbeb4-dca6-7de1-aa18-d7d0f55b8d99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountUnits"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest_019cbeb4-dca6-7ace-8827-d81a5af94a24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/OrganizationandBasisofPresentationandConsolidationDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#OrganizationandBasisofPresentationandConsolidationDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/OrganizationandBasisofPresentationandConsolidationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_019cbeb4-dca6-7600-b099-5df35fa678b3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_019cbeb4-dca6-7673-8421-65d8b14b1215" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_019cbeb4-dca6-7600-b099-5df35fa678b3" xlink:to="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_019cbeb4-dca6-7673-8421-65d8b14b1215" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetTable_019cbeb4-dca6-7673-8421-65d8b14b1215" xlink:to="loc_srt_OwnershipAxis_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dca6-79f6-92f6-28873a7dc23a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dca6-74b0-9c5b-736ed5f70ff1" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dca6-79f6-92f6-28873a7dc23a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_GenesisEnergyLLCMember_019cbeb4-dca6-79ca-a10d-1f103f86e9f2" xlink:href="gel-20260331.xsd#gel_GenesisEnergyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019cbeb4-dca6-79f6-92f6-28873a7dc23a" xlink:to="loc_gel_GenesisEnergyLLCMember_019cbeb4-dca6-79ca-a10d-1f103f86e9f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_019cbeb4-dca6-7a7c-b342-9df1ef11c0f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_019cbeb4-dca6-7600-b099-5df35fa678b3" xlink:to="loc_us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest_019cbeb4-dca6-7a7c-b342-9df1ef11c0f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_019cbeb4-dca6-7ef7-a6ab-d8847ec99073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestEffectsOfChangesNetLineItems_019cbeb4-dca6-7600-b099-5df35fa678b3" xlink:to="loc_us-gaap_NumberOfReportableSegments_019cbeb4-dca6-7ef7-a6ab-d8847ec99073" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/RevenueRecognitionDisaggregatedRevenueDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#RevenueRecognitionDisaggregatedRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/RevenueRecognitionDisaggregatedRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019cbeb4-dd45-7f4b-9027-57cfb74d5fb1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019cbeb4-dd45-7f4b-9027-57cfb74d5fb1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7869-819e-f2dd8bf0704d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cbeb4-dd45-7f4b-9027-57cfb74d5fb1" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7869-819e-f2dd8bf0704d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7869-819e-f2dd8bf0704d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7869-819e-f2dd8bf0704d" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7869-819e-f2dd8bf0704d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-773e-8e00-72ebf4d28f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7869-819e-f2dd8bf0704d" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-773e-8e00-72ebf4d28f8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7554-91e1-57e4fc92bb7c" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-773e-8e00-72ebf4d28f8c" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7554-91e1-57e4fc92bb7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-7e87-8490-eb3c60c45204" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-773e-8e00-72ebf4d28f8c" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-7e87-8490-eb3c60c45204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7d60-b2ca-d981e130dfcb" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-773e-8e00-72ebf4d28f8c" xlink:to="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7d60-b2ca-d981e130dfcb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-76b3-8edd-dcc48c3881f0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cbeb4-dd45-7f4b-9027-57cfb74d5fb1" xlink:to="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-76b3-8edd-dcc48c3881f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-76b3-8edd-dcc48c3881f0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-76b3-8edd-dcc48c3881f0" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-76b3-8edd-dcc48c3881f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7a9c-b550-f7e338099259" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-76b3-8edd-dcc48c3881f0" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7a9c-b550-f7e338099259" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_FeebasedRevenuesMember_019cbeb4-dd45-7169-bd45-3297bb87f272" xlink:href="gel-20260331.xsd#gel_FeebasedRevenuesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7a9c-b550-f7e338099259" xlink:to="loc_gel_FeebasedRevenuesMember_019cbeb4-dd45-7169-bd45-3297bb87f272" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_ProductSalesMember_019cbeb4-dd45-715a-a3bc-36ce61955312" xlink:href="gel-20260331.xsd#gel_ProductSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7a9c-b550-f7e338099259" xlink:to="loc_gel_ProductSalesMember_019cbeb4-dd45-715a-a3bc-36ce61955312" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_RefineryServicesMember_019cbeb4-dd45-70bc-8757-7c74afcc2f6e" xlink:href="gel-20260331.xsd#gel_RefineryServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7a9c-b550-f7e338099259" xlink:to="loc_gel_RefineryServicesMember_019cbeb4-dd45-70bc-8757-7c74afcc2f6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7133-9d9c-470b969da1d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019cbeb4-dd45-7f4b-9027-57cfb74d5fb1" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7133-9d9c-470b969da1d0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7133-9d9c-470b969da1d0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7133-9d9c-470b969da1d0" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7133-9d9c-470b969da1d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7c0b-a32e-1e1f1aaf9f13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7133-9d9c-470b969da1d0" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7c0b-a32e-1e1f1aaf9f13" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-74a3-8eb6-6da429cb8245" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-74a3-8eb6-6da429cb8245" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019cbeb4-dd45-7a56-9e16-83dfbfef3995" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019cbeb4-dd45-7a56-9e16-83dfbfef3995" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cbeb4-dd45-7634-a578-e4883dbcc228" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019cbeb4-dd45-7634-a578-e4883dbcc228" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cbeb4-dd45-761e-bdb0-bff688600d1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_019cbeb4-dd45-761e-bdb0-bff688600d1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent_019cbf22-359c-7498-a29b-be7586141042" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019cbeb4-dd45-7ab0-be74-350f87dababf" xlink:to="loc_us-gaap_ContractWithCustomerAssetAccumulatedAllowanceForCreditLossCurrent_019cbf22-359c-7498-a29b-be7586141042" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019cbeb4-dd45-7aba-82f2-cedf55df28b0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_019cbeb4-dd45-7aba-82f2-cedf55df28b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7251-afa4-e6f35e00b756_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7251-afa4-e6f35e00b756_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7964-86ea-c2357cd027b2" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7964-86ea-c2357cd027b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7699-91c9-109902172a8d" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7699-91c9-109902172a8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationMember_019dd5d4-5b22-7526-9e94-9ef09ef054f1" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OffshorePipelineTransportationMember_019dd5d4-5b22-7526-9e94-9ef09ef054f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesandTransportationMember_019dd5d4-5b22-7c37-b83a-e955e690e289" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesandTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OnshoreFacilitiesandTransportationMember_019dd5d4-5b22-7c37-b83a-e955e690e289" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019cbeb4-dd45-7e67-9149-7c1021d43711" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019cbeb4-dd45-7e67-9149-7c1021d43711" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019cbeb4-dd45-76d9-8ded-fe631df3c468" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019cbeb4-dd45-76d9-8ded-fe631df3c468" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails_1" xlink:type="simple" xlink:href="gel-20260331.xsd#RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails_1"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/RevenueRecognitionRevenueExpectedtobeRecognizedinFuturePeriodsDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTable_019cbeb4-dd45-78dc-9c4e-400d9362f7d0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7251-afa4-e6f35e00b756_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7251-afa4-e6f35e00b756_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7251-afa4-e6f35e00b756" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7964-86ea-c2357cd027b2" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7964-86ea-c2357cd027b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7699-91c9-109902172a8d" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-7699-91c9-109902172a8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationMember_019dd5d4-5b22-7526-9e94-9ef09ef054f1" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OffshorePipelineTransportationMember_019dd5d4-5b22-7526-9e94-9ef09ef054f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesandTransportationMember_019dd5d4-5b22-7c37-b83a-e955e690e289" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesandTransportationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-737b-b883-2d795279615d" xlink:to="loc_gel_OnshoreFacilitiesandTransportationMember_019dd5d4-5b22-7c37-b83a-e955e690e289" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_019cbeb4-dd45-7e67-9149-7c1021d43711" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_019cbeb4-dd45-7e67-9149-7c1021d43711" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019cbeb4-dd45-76d9-8ded-fe631df3c468" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionLineItems_019cbeb4-dd45-7e1c-b56b-6bdcd8875efa" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_019cbeb4-dd45-76d9-8ded-fe631df3c468" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DiscontinuedOperationsNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DiscontinuedOperationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DiscontinuedOperationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7c14-9006-76da2d8b2498" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7c14-9006-76da2d8b2498" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7da2-a282-a370a9ffe36b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7c14-9006-76da2d8b2498" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7da2-a282-a370a9ffe36b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7da2-a282-a370a9ffe36b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7da2-a282-a370a9ffe36b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7da2-a282-a370a9ffe36b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-778d-8b59-9aab6a2bbd80" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7da2-a282-a370a9ffe36b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-778d-8b59-9aab6a2bbd80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-75d5-bfd6-4b48c067687a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-778d-8b59-9aab6a2bbd80" xlink:to="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-75d5-bfd6-4b48c067687a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7750-9a84-e77644300ff2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7c14-9006-76da2d8b2498" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7750-9a84-e77644300ff2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7750-9a84-e77644300ff2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7750-9a84-e77644300ff2" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-7750-9a84-e77644300ff2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-73d2-a958-a315288fd4ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019cbeb4-dd45-7750-9a84-e77644300ff2" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-73d2-a958-a315288fd4ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_AlkaliBusinessMember_019cbeb4-dd45-7212-9af6-ad917b1b8456" xlink:href="gel-20260331.xsd#gel_AlkaliBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019cbeb4-dd45-73d2-a958-a315288fd4ca" xlink:to="loc_gel_AlkaliBusinessMember_019cbeb4-dd45-7212-9af6-ad917b1b8456" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019dfe17-05a3-7879-a2d8-05d4136403ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7c14-9006-76da2d8b2498" xlink:to="loc_us-gaap_DebtInstrumentAxis_019dfe17-05a3-7879-a2d8-05d4136403ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dfe17-05a3-7879-a2d8-05d4136403ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dfe17-05a3-7879-a2d8-05d4136403ea" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dfe17-05a3-7879-a2d8-05d4136403ea_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019dfe17-05a3-784e-b40c-8e32cf8c2c62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019dfe17-05a3-7879-a2d8-05d4136403ea" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019dfe17-05a3-784e-b40c-8e32cf8c2c62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_FivePointEightSevenFivePercentageSeniorSecuredNoteMember_019dfe17-3458-7a1b-a0e7-08225b95bddf" xlink:href="gel-20260331.xsd#gel_FivePointEightSevenFivePercentageSeniorSecuredNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019dfe17-05a3-784e-b40c-8e32cf8c2c62" xlink:to="loc_gel_FivePointEightSevenFivePercentageSeniorSecuredNoteMember_019dfe17-3458-7a1b-a0e7-08225b95bddf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_019cbeb4-dd45-75ac-9954-695c05947a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration_019cbeb4-dd45-75ac-9954-695c05947a9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_019cbeb4-dd45-786b-8e27-51b8f135f632" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:to="loc_us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested_019cbeb4-dd45-786b-8e27-51b8f135f632" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019cbeb4-dd45-7757-b614-0fc22a8d12d3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019cbeb4-dd45-7757-b614-0fc22a8d12d3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-79c6-b0a0-eceeabf02add" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-769a-82c8-81da1bf0a5d9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-79c6-b0a0-eceeabf02add" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DiscontinuedOperationsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DiscontinuedOperationsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DiscontinuedOperationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7f26-9e3c-816d3d129a28" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7f26-9e3c-816d3d129a28" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e12-8719-e96187be825e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7f26-9e3c-816d3d129a28" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e12-8719-e96187be825e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7e12-8719-e96187be825e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e12-8719-e96187be825e" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7e12-8719-e96187be825e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7d90-b886-1d80150a6e59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e12-8719-e96187be825e" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7d90-b886-1d80150a6e59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_019cbeb4-dd45-758d-a996-2c923616ffab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7d90-b886-1d80150a6e59" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_019cbeb4-dd45-758d-a996-2c923616ffab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember_019cbeb4-dd45-74b0-9770-4ac4ee33dc96" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7d90-b886-1d80150a6e59" xlink:to="loc_us-gaap_DisposalGroupHeldforsaleNotDiscontinuedOperationsMember_019cbeb4-dd45-74b0-9770-4ac4ee33dc96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_019cbeb4-dd45-7f25-bd34-a494ad5328e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_019cbeb4-dd45-7f25-bd34-a494ad5328e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_019cbeb4-dd45-781d-a9b4-74ba150e265f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_019cbeb4-dd45-781d-a9b4-74ba150e265f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_019cbeb4-dd45-78ac-8a47-55d23b54ef23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationGeneralAndAdministrativeExpense_019cbeb4-dd45-78ac-8a47-55d23b54ef23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_019cbeb4-dd45-7663-a213-c9ea7a1369e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationDepreciationAndAmortization_019cbeb4-dd45-7663-a213-c9ea7a1369e7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_019cbeb4-dd45-7a92-9f8d-5e1e50bbcd2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupNotDiscontinuedOperationIncomeStatementDisclosuresAbstract_019cbeb4-dd45-750c-9fb7-a9df719d85d6" xlink:to="loc_us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_019cbeb4-dd45-7a92-9f8d-5e1e50bbcd2f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_019cbeb4-dd45-7ac4-b63e-35da6ed550b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax_019cbeb4-dd45-7ac4-b63e-35da6ed550b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_019cbeb4-dd45-75ff-8bd9-68b971bc2c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax_019cbeb4-dd45-75ff-8bd9-68b971bc2c63" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_019cbeb4-dd45-76b4-9f5d-9e988ac7ade0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax_019cbeb4-dd45-76b4-9f5d-9e988ac7ade0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_019cbeb4-dd45-7f9d-937a-073f5fb192d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_DiscontinuedOperationTaxEffectOfDiscontinuedOperation_019cbeb4-dd45-7f9d-937a-073f5fb192d0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_019cbeb4-dd45-7d05-b2ae-f56fb97137bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-7622-a280-34ee5ef59b24" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_019cbeb4-dd45-7d05-b2ae-f56fb97137bc" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DiscontinuedOperationsSummaryofCashFlowsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DiscontinuedOperationsSummaryofCashFlowsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DiscontinuedOperationsSummaryofCashFlowsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-70b1-83f8-7c0a0bd0237e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7633-8de8-06043c424033" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-70b1-83f8-7c0a0bd0237e" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7633-8de8-06043c424033" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e42-aef8-2d9ba7351572" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019cbeb4-dd45-7633-8de8-06043c424033" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e42-aef8-2d9ba7351572" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7e42-aef8-2d9ba7351572_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e42-aef8-2d9ba7351572" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-7e42-aef8-2d9ba7351572_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-741f-b83f-040937b575c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_019cbeb4-dd45-7e42-aef8-2d9ba7351572" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-741f-b83f-040937b575c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_019cbeb4-dd45-77f0-adfa-c73678aec67c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DiscontinuedOperationsDisposedOfBySaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_019cbeb4-dd45-741f-b83f-040937b575c8" xlink:to="loc_us-gaap_DiscontinuedOperationsDisposedOfBySaleMember_019cbeb4-dd45-77f0-adfa-c73678aec67c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_019cbeb4-dd45-757e-ab26-98ca68ef0e24" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-70b1-83f8-7c0a0bd0237e" xlink:to="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_019cbeb4-dd45-757e-ab26-98ca68ef0e24" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_019cbeb4-dd45-7285-9c91-3f30307222dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-70b1-83f8-7c0a0bd0237e" xlink:to="loc_us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations_019cbeb4-dd45-7285-9c91-3f30307222dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations_019cbeb4-dd45-7cd6-9efe-6a7165e14852" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_019cbeb4-dd45-70b1-83f8-7c0a0bd0237e" xlink:to="loc_us-gaap_CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations_019cbeb4-dd45-7cd6-9efe-6a7165e14852" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/LeaseAccountingDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#LeaseAccountingDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/LeaseAccountingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionLineItems_019cbeb4-dd45-7f3f-a5cf-64b1e9a54300" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorLeaseDescriptionTable_019cbeb4-dd45-7bb2-b4e2-88fa7bb97865" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019cbeb4-dd45-7f3f-a5cf-64b1e9a54300" xlink:to="loc_us-gaap_LessorLeaseDescriptionTable_019cbeb4-dd45-7bb2-b4e2-88fa7bb97865" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_019cbeb4-dd45-7ae1-86af-eba33c712223" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_019cbeb4-dd45-7bb2-b4e2-88fa7bb97865" xlink:to="loc_srt_CounterpartyNameAxis_019cbeb4-dd45-7ae1-86af-eba33c712223" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019cbeb4-dd45-7ae1-86af-eba33c712223_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_019cbeb4-dd45-7ae1-86af-eba33c712223" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019cbeb4-dd45-7ae1-86af-eba33c712223_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019cbeb4-dd45-753c-bc62-ad2dffc69817" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_019cbeb4-dd45-7ae1-86af-eba33c712223" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019cbeb4-dd45-753c-bc62-ad2dffc69817" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MTAmericanPhoenixMember_019cbeb4-dd45-7f26-abc7-b6c8e911b48f" xlink:href="gel-20260331.xsd#gel_MTAmericanPhoenixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_019cbeb4-dd45-753c-bc62-ad2dffc69817" xlink:to="loc_gel_MTAmericanPhoenixMember_019cbeb4-dd45-7f26-abc7-b6c8e911b48f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LessorLeaseDescriptionTable_019cbeb4-dd45-7bb2-b4e2-88fa7bb97865" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7507-ada5-dd5f183e573c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7c54-9b8d-ffaa27b2527a" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7507-ada5-dd5f183e573c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-7635-b94f-416125c827c9" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7507-ada5-dd5f183e573c" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-7635-b94f-416125c827c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_019cbeb4-dd45-7fd0-bd4f-8090a8ff554d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019cbeb4-dd45-7f3f-a5cf-64b1e9a54300" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths_019cbeb4-dd45-7fd0-bd4f-8090a8ff554d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLeaseIncome_019cbeb4-dd45-7c68-84d0-ba9c048e2174" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLeaseIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019cbeb4-dd45-7f3f-a5cf-64b1e9a54300" xlink:to="loc_us-gaap_OperatingLeaseLeaseIncome_019cbeb4-dd45-7c68-84d0-ba9c048e2174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_019cbeb4-dd45-7930-a38e-8eb5f9ddf1f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LessorLeaseDescriptionLineItems_019cbeb4-dd45-7f3f-a5cf-64b1e9a54300" xlink:to="loc_us-gaap_LessorOperatingLeasePaymentsToBeReceivedTwoYears_019cbeb4-dd45-7930-a38e-8eb5f9ddf1f6" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/FixedAssetsandAssetRetirementObligationsFixedAssetsNetDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#FixedAssetsandAssetRetirementObligationsFixedAssetsNetDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/FixedAssetsandAssetRetirementObligationsFixedAssetsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cbeb4-dd45-7f9c-89b5-84e7bfcca618" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cbeb4-dd45-7cb9-af5e-f130791b2734" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cbeb4-dd45-7f9c-89b5-84e7bfcca618" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cbeb4-dd45-7cb9-af5e-f130791b2734" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cbeb4-dd45-71b3-a0f0-602c000a2f94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_019cbeb4-dd45-7cb9-af5e-f130791b2734" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cbeb4-dd45-71b3-a0f0-602c000a2f94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-71b3-a0f0-602c000a2f94_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cbeb4-dd45-71b3-a0f0-602c000a2f94" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-71b3-a0f0-602c000a2f94_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_019cbeb4-dd45-71b3-a0f0-602c000a2f94" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PipelinesMember_019cbeb4-dd45-79c5-bddb-dd32ddce03b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PipelinesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_PipelinesMember_019cbeb4-dd45-79c5-bddb-dd32ddce03b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_019cbeb4-dd45-7779-bd3d-cbde1f5ea1ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_019cbeb4-dd45-7779-bd3d-cbde1f5ea1ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransportationEquipmentMember_019cbeb4-dd45-7ca9-9a12-ac5e40d97b14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransportationEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_TransportationEquipmentMember_019cbeb4-dd45-7ca9-9a12-ac5e40d97b14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaritimeEquipmentMember_019cbeb4-dd45-70f6-8f0f-fef225ab812e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaritimeEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_MaritimeEquipmentMember_019cbeb4-dd45-70f6-8f0f-fef225ab812e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandBuildingsAndImprovementsMember_019cbeb4-dd45-7009-9c13-fb9fb2697324" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LandBuildingsAndImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_LandBuildingsAndImprovementsMember_019cbeb4-dd45-7009-9c13-fb9fb2697324" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_019cbeb4-dd45-7941-a8fc-d7e07cb73d70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_019cbeb4-dd45-7941-a8fc-d7e07cb73d70" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_019cbeb4-dd45-79d4-ba96-86e9b8ac02cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_ConstructionInProgressMember_019cbeb4-dd45-79d4-ba96-86e9b8ac02cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_019cbeb4-dd45-7335-9652-c46eeaa3a1e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentOtherTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_019cbeb4-dd45-7454-b5a0-0df71dfc3727" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentOtherTypesMember_019cbeb4-dd45-7335-9652-c46eeaa3a1e9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019cbeb4-dd45-72e4-82a9-5f84d28c9b5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cbeb4-dd45-7f9c-89b5-84e7bfcca618" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019cbeb4-dd45-72e4-82a9-5f84d28c9b5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019cbeb4-dd45-7277-8b29-06b1a94883e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cbeb4-dd45-7f9c-89b5-84e7bfcca618" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019cbeb4-dd45-7277-8b29-06b1a94883e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019cbeb4-dd45-7339-a7fc-fd1649d699fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_019cbeb4-dd45-7f9c-89b5-84e7bfcca618" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019cbeb4-dd45-7339-a7fc-fd1649d699fb" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/FixedAssetsMineralLeaseholdsandAssetRetirementObligationsNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#FixedAssetsMineralLeaseholdsandAssetRetirementObligationsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/FixedAssetsMineralLeaseholdsandAssetRetirementObligationsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_gel_AssetRetirementObligationsDetailsLineItems_019cbeb4-dd45-7801-bce3-fa60bf423770" xlink:href="gel-20260331.xsd#gel_AssetRetirementObligationsDetailsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_AssetRetirementObligationsDetailsTable_019cbeb4-dd45-7313-ab11-7b73a1bdb6cc" xlink:href="gel-20260331.xsd#gel_AssetRetirementObligationsDetailsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gel_AssetRetirementObligationsDetailsLineItems_019cbeb4-dd45-7801-bce3-fa60bf423770" xlink:to="loc_gel_AssetRetirementObligationsDetailsTable_019cbeb4-dd45-7313-ab11-7b73a1bdb6cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-7118-9e71-7f785b6c0499" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_AssetRetirementObligationsDetailsTable_019cbeb4-dd45-7313-ab11-7b73a1bdb6cc" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-7118-9e71-7f785b6c0499" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-7118-9e71-7f785b6c0499_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-7118-9e71-7f785b6c0499" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-7118-9e71-7f785b6c0499_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-7dd3-8802-4394185f0c68" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-7118-9e71-7f785b6c0499" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-7dd3-8802-4394185f0c68" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_019cbeb4-dd45-79db-b0e3-5330fa5015b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-7dd3-8802-4394185f0c68" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_019cbeb4-dd45-79db-b0e3-5330fa5015b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetRetirementObligation_019cbeb4-dd45-7046-a5b9-b51d3899deae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetRetirementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_AssetRetirementObligationsDetailsLineItems_019cbeb4-dd45-7801-bce3-fa60bf423770" xlink:to="loc_us-gaap_AssetRetirementObligation_019cbeb4-dd45-7046-a5b9-b51d3899deae" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/IntangibleAssetsScheduleofComponentsofIntangibleAssetsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#IntangibleAssetsScheduleofComponentsofIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/IntangibleAssetsScheduleofComponentsofIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cbeb4-dd45-7238-8ca5-96dee36ef011" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cbeb4-dd45-716a-b0f0-91b92a070334" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cbeb4-dd45-7238-8ca5-96dee36ef011" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cbeb4-dd45-716a-b0f0-91b92a070334" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cbeb4-dd45-7c94-90ea-acd961f2f7b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cbeb4-dd45-716a-b0f0-91b92a070334" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cbeb4-dd45-7c94-90ea-acd961f2f7b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-7c94-90ea-acd961f2f7b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cbeb4-dd45-7c94-90ea-acd961f2f7b8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-7c94-90ea-acd961f2f7b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-737c-ac45-88781df943b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019cbeb4-dd45-7c94-90ea-acd961f2f7b8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-737c-ac45-88781df943b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractualRightsMember_019cbeb4-dd45-79c6-a3b2-1e07783b36f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractualRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-737c-ac45-88781df943b1" xlink:to="loc_us-gaap_ContractualRightsMember_019cbeb4-dd45-79c6-a3b2-1e07783b36f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_019cbeb4-dd45-75d9-9fea-901e60a560dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019cbeb4-dd45-737c-ac45-88781df943b1" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_019cbeb4-dd45-75d9-9fea-901e60a560dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-72e8-914f-19e4b9b0f481" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019cbeb4-dd45-716a-b0f0-91b92a070334" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-72e8-914f-19e4b9b0f481" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-72e8-914f-19e4b9b0f481_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-72e8-914f-19e4b9b0f481" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-72e8-914f-19e4b9b0f481_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7acd-a46f-b30ad3408a77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-72e8-914f-19e4b9b0f481" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7acd-a46f-b30ad3408a77" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-705b-9b4f-05b4819ad5eb" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7acd-a46f-b30ad3408a77" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-705b-9b4f-05b4819ad5eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cbeb4-dd45-76a1-8017-a1cdcf48b2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cbeb4-dd45-7238-8ca5-96dee36ef011" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019cbeb4-dd45-76a1-8017-a1cdcf48b2ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cbeb4-dd45-79fb-9a77-e7c00ccad3ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cbeb4-dd45-7238-8ca5-96dee36ef011" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019cbeb4-dd45-79fb-9a77-e7c00ccad3ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cbeb4-dd45-73ac-a810-4bf8eed0fca4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019cbeb4-dd45-7238-8ca5-96dee36ef011" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019cbeb4-dd45-73ac-a810-4bf8eed0fca4" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DebtScheduleofObligationsUnderDebtArrangementsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DebtScheduleofObligationsUnderDebtArrangementsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DebtScheduleofObligationsUnderDebtArrangementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-710a-91f7-5a037ea40260" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-710a-91f7-5a037ea40260" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-7439-a999-0cc9d4d0f395" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-710a-91f7-5a037ea40260" xlink:to="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-7439-a999-0cc9d4d0f395" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7439-a999-0cc9d4d0f395_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-7439-a999-0cc9d4d0f395" xlink:to="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7439-a999-0cc9d4d0f395_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-75a6-be36-504993a9a094" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-7439-a999-0cc9d4d0f395" xlink:to="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-75a6-be36-504993a9a094" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cbeb4-dd45-7bb8-91b4-da858567aa3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-75a6-be36-504993a9a094" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cbeb4-dd45-7bb8-91b4-da858567aa3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7d75-94c8-a82ace912ced" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-710a-91f7-5a037ea40260" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7d75-94c8-a82ace912ced" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7d75-94c8-a82ace912ced_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7d75-94c8-a82ace912ced" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7d75-94c8-a82ace912ced_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7d75-94c8-a82ace912ced" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_SeniorSecuredCreditFacilityRevolvingMember_019cbeb4-dd45-73f7-b68c-0bdf2f1f2f57" xlink:href="gel-20260331.xsd#gel_SeniorSecuredCreditFacilityRevolvingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_gel_SeniorSecuredCreditFacilityRevolvingMember_019cbeb4-dd45-73f7-b68c-0bdf2f1f2f57" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2028NotesMember_019cbeb4-dd45-715e-b87e-a90de5a3b887" xlink:href="gel-20260331.xsd#gel_A2028NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_gel_A2028NotesMember_019cbeb4-dd45-715e-b87e-a90de5a3b887" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A8.250SeniorUnsecuredNotesDue2029Member_019cbeb4-dd45-79e9-86bc-9953f357fffb" xlink:href="gel-20260331.xsd#gel_A8.250SeniorUnsecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_gel_A8.250SeniorUnsecuredNotesDue2029Member_019cbeb4-dd45-79e9-86bc-9953f357fffb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A8.000SeniorUnsecuredNotesDue2033Member_019cbeb4-dd45-724a-b946-4ea1aceba5d3" xlink:href="gel-20260331.xsd#gel_A8.000SeniorUnsecuredNotesDue2033Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_gel_A8.000SeniorUnsecuredNotesDue2033Member_019cbeb4-dd45-724a-b946-4ea1aceba5d3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A6.750SeniorUnsecuredNotesDue2024Member_019dd603-adb1-7bb5-a7bb-e63e28c06078" xlink:href="gel-20260331.xsd#gel_A6.750SeniorUnsecuredNotesDue2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_gel_A6.750SeniorUnsecuredNotesDue2024Member_019dd603-adb1-7bb5-a7bb-e63e28c06078" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019de4a5-ecd9-7070-8d1e-aeae2619128b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7c9b-9487-989db94ffef9" xlink:to="loc_us-gaap_SeniorNotesMember_019de4a5-ecd9-7070-8d1e-aeae2619128b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-710a-91f7-5a037ea40260" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-74b9-a4d0-56c0a1ffd44c" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019cbeb4-dd45-7781-a184-b5561242b344" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:to="loc_us-gaap_LineOfCreditMember_019cbeb4-dd45-7781-a184-b5561242b344" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-72f9-b066-4b9b1d1e1f71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:to="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-72f9-b066-4b9b1d1e1f71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2030NotesMember_019cbeb4-dd45-70d7-a3a4-4365ef3a6193" xlink:href="gel-20260331.xsd#gel_A2030NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:to="loc_gel_A2030NotesMember_019cbeb4-dd45-70d7-a3a4-4365ef3a6193" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2032NotesMember_019cbeb4-dd45-7619-9842-4c65102df07c" xlink:href="gel-20260331.xsd#gel_A2032NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d3a-ada9-bdb9be2d7795" xlink:to="loc_gel_A2032NotesMember_019cbeb4-dd45-7619-9842-4c65102df07c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019cbeb4-dd45-7bff-8ed7-fbbe757b5148" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019cbeb4-dd45-7bff-8ed7-fbbe757b5148" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019cbeb4-dd45-7871-8347-6ac5c945d000" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019cbeb4-dd45-7871-8347-6ac5c945d000" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019cbeb4-dd45-7fd8-83b5-82c982e5bd83" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_LongTermDebt_019cbeb4-dd45-7fd8-83b5-82c982e5bd83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-76bc-a83e-0d0b6f590b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-76bc-a83e-0d0b6f590b1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019cbeb4-dd45-7df6-b9fb-6690628f9faf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNoncurrentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7304-922f-9c150b32ce6c" xlink:to="loc_us-gaap_DeferredFinanceCostsNoncurrentNet_019cbeb4-dd45-7df6-b9fb-6690628f9faf" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DebtNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DebtNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-766a-9f91-470a80b96d35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-766a-9f91-470a80b96d35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-766a-9f91-470a80b96d35_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-766a-9f91-470a80b96d35" xlink:to="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-766a-9f91-470a80b96d35_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7475-a445-674dc5303e89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019cbeb4-dd45-766a-9f91-470a80b96d35" xlink:to="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7475-a445-674dc5303e89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019cbeb4-dd45-7f7d-8b45-6d6bbe39eab5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7475-a445-674dc5303e89" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019cbeb4-dd45-7f7d-8b45-6d6bbe39eab5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BridgeLoanMember_019cbeb4-dd45-70b3-90f3-4171916b49bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BridgeLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019cbeb4-dd45-7475-a445-674dc5303e89" xlink:to="loc_us-gaap_BridgeLoanMember_019cbeb4-dd45-70b3-90f3-4171916b49bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7242-8d6e-389251d1297b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7242-8d6e-389251d1297b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7242-8d6e-389251d1297b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7242-8d6e-389251d1297b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-7242-8d6e-389251d1297b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd45-7242-8d6e-389251d1297b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_SeniorSecuredCreditFacilityRevolvingMember_019cbeb4-dd45-7d13-a5d7-a7c807d7ed18" xlink:href="gel-20260331.xsd#gel_SeniorSecuredCreditFacilityRevolvingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:to="loc_gel_SeniorSecuredCreditFacilityRevolvingMember_019cbeb4-dd45-7d13-a5d7-a7c807d7ed18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_SeniorSecuredCreditFacilityMember_019cbeb4-dd45-7c36-ad46-786e2fe836cb" xlink:href="gel-20260331.xsd#gel_SeniorSecuredCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:to="loc_gel_SeniorSecuredCreditFacilityMember_019cbeb4-dd45-7c36-ad46-786e2fe836cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2028NotesMember_019cbeb4-dd45-7800-855b-bdc6d95f8f13" xlink:href="gel-20260331.xsd#gel_A2028NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:to="loc_gel_A2028NotesMember_019cbeb4-dd45-7800-855b-bdc6d95f8f13" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-7558-bbdc-bbf8ba51f691" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:to="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-7558-bbdc-bbf8ba51f691" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2034NotesMember_019de4a2-f1e0-71fe-8acc-29cc31a99838" xlink:href="gel-20260331.xsd#gel_A2034NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd45-75c4-9556-c7d6ed2b0b2b" xlink:to="loc_gel_A2034NotesMember_019de4a2-f1e0-71fe-8acc-29cc31a99838" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7d54-bdb9-e6cb7413c631" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7d54-bdb9-e6cb7413c631" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d54-bdb9-e6cb7413c631_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7d54-bdb9-e6cb7413c631" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-7d54-bdb9-e6cb7413c631_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019cbeb4-dd45-7d54-bdb9-e6cb7413c631" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019cbeb4-dd45-7e36-bb44-80fdde0a0c7c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:to="loc_us-gaap_LineOfCreditMember_019cbeb4-dd45-7e36-bb44-80fdde0a0c7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-7893-851a-af978273b3cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:to="loc_us-gaap_SeniorNotesMember_019cbeb4-dd45-7893-851a-af978273b3cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2032NotesMember_019cbeb4-dd45-780c-b822-6541759e9de0" xlink:href="gel-20260331.xsd#gel_A2032NotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:to="loc_gel_A2032NotesMember_019cbeb4-dd45-780c-b822-6541759e9de0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019de4a2-f1e0-7a95-b176-7da03c4028eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019cbeb4-dd45-771a-baee-58d53e44eac3" xlink:to="loc_us-gaap_UnsecuredDebtMember_019de4a2-f1e0-7a95-b176-7da03c4028eb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019cbeb4-dd45-7890-a705-30a15631b4b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_VariableRateAxis_019cbeb4-dd45-7890-a705-30a15631b4b8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7890-a705-30a15631b4b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019cbeb4-dd45-7890-a705-30a15631b4b8" xlink:to="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7890-a705-30a15631b4b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7ca8-bdd7-5ba50e0d5760" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019cbeb4-dd45-7890-a705-30a15631b4b8" xlink:to="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7ca8-bdd7-5ba50e0d5760" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_FederalFundsEffectiveRateMember_019cbeb4-dd45-7966-9d49-fdadf9459e87" xlink:href="gel-20260331.xsd#gel_FederalFundsEffectiveRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7ca8-bdd7-5ba50e0d5760" xlink:to="loc_gel_FederalFundsEffectiveRateMember_019cbeb4-dd45-7966-9d49-fdadf9459e87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_019cbeb4-dd45-70e5-88dd-c4ff74e4e390" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7ca8-bdd7-5ba50e0d5760" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_019cbeb4-dd45-70e5-88dd-c4ff74e4e390" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_AlternateBaseRateMember_019cbeb4-dd45-7f1c-875b-79e0e481fa91" xlink:href="gel-20260331.xsd#gel_AlternateBaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019cbeb4-dd45-7ca8-bdd7-5ba50e0d5760" xlink:to="loc_gel_AlternateBaseRateMember_019cbeb4-dd45-7f1c-875b-79e0e481fa91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtApplicableMarginAxis_019cbeb4-dd45-7218-b456-80e16b0e7270" xlink:href="gel-20260331.xsd#gel_DebtApplicableMarginAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_gel_DebtApplicableMarginAxis_019cbeb4-dd45-7218-b456-80e16b0e7270" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7218-b456-80e16b0e7270_default" xlink:href="gel-20260331.xsd#gel_DebtApplicableMarginDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gel_DebtApplicableMarginAxis_019cbeb4-dd45-7218-b456-80e16b0e7270" xlink:to="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7218-b456-80e16b0e7270_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7295-a9c2-678dd115b909" xlink:href="gel-20260331.xsd#gel_DebtApplicableMarginDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gel_DebtApplicableMarginAxis_019cbeb4-dd45-7218-b456-80e16b0e7270" xlink:to="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7295-a9c2-678dd115b909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OneMonthTenorMember_019cbeb4-dd45-72dc-a5cb-8e43dc0c7397" xlink:href="gel-20260331.xsd#gel_OneMonthTenorMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7295-a9c2-678dd115b909" xlink:to="loc_gel_OneMonthTenorMember_019cbeb4-dd45-72dc-a5cb-8e43dc0c7397" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_TermSOFRAdjustmentMember_019cbeb4-dd45-72b5-bfea-dafadfe9655f" xlink:href="gel-20260331.xsd#gel_TermSOFRAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_DebtApplicableMarginDomain_019cbeb4-dd45-7295-a9c2-678dd115b909" xlink:to="loc_gel_TermSOFRAdjustmentMember_019cbeb4-dd45-72b5-bfea-dafadfe9655f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019cbeb4-dd45-7114-9512-a5ef37cfb5c4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_srt_RangeAxis_019cbeb4-dd45-7114-9512-a5ef37cfb5c4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cbeb4-dd45-7114-9512-a5ef37cfb5c4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019cbeb4-dd45-7114-9512-a5ef37cfb5c4" xlink:to="loc_srt_RangeMember_019cbeb4-dd45-7114-9512-a5ef37cfb5c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019cbeb4-dd45-7f0e-827d-97f776b03929" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019cbeb4-dd45-7114-9512-a5ef37cfb5c4" xlink:to="loc_srt_RangeMember_019cbeb4-dd45-7f0e-827d-97f776b03929" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019cbeb4-dd45-7170-863f-c6db1129409d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cbeb4-dd45-7f0e-827d-97f776b03929" xlink:to="loc_srt_MaximumMember_019cbeb4-dd45-7170-863f-c6db1129409d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019cbeb4-dd45-7702-8c5f-275a904b3b7b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019cbeb4-dd45-7f0e-827d-97f776b03929" xlink:to="loc_srt_MinimumMember_019cbeb4-dd45-7702-8c5f-275a904b3b7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_019cbeb4-dd45-7c59-9131-f5d9759979ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesInventoryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_019cbeb4-dd45-7c59-9131-f5d9759979ef" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_019cbeb4-dd45-7c59-9131-f5d9759979ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_019cbeb4-dd45-7c59-9131-f5d9759979ef" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_019cbeb4-dd45-7c59-9131-f5d9759979ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_019cbeb4-dd45-79d8-915e-88ec4d72c2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_019cbeb4-dd45-7c59-9131-f5d9759979ef" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_019cbeb4-dd45-79d8-915e-88ec4d72c2a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryPetroleumProductsMember_019cbeb4-dd45-7ddb-85b4-74c229eee04f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PublicUtilitiesInventoryPetroleumProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_019cbeb4-dd45-79d8-915e-88ec4d72c2a9" xlink:to="loc_us-gaap_PublicUtilitiesInventoryPetroleumProductsMember_019cbeb4-dd45-7ddb-85b4-74c229eee04f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019cbeb4-dd45-757d-ad9d-0ef311f27231" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019cbeb4-dd45-757d-ad9d-0ef311f27231" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cbeb4-dd45-757d-ad9d-0ef311f27231_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cbeb4-dd45-757d-ad9d-0ef311f27231" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cbeb4-dd45-757d-ad9d-0ef311f27231_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cbeb4-dd45-70e9-921e-33702610939a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cbeb4-dd45-757d-ad9d-0ef311f27231" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cbeb4-dd45-70e9-921e-33702610939a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_GuarantorSubsidiariesMember_019cbeb4-dd45-788a-a19d-728589bdfc0e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_GuarantorSubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019cbeb4-dd45-70e9-921e-33702610939a" xlink:to="loc_srt_GuarantorSubsidiariesMember_019cbeb4-dd45-788a-a19d-728589bdfc0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019cbeb4-dd45-7759-9eb1-ee97e09adadd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_srt_OwnershipAxis_019cbeb4-dd45-7759-9eb1-ee97e09adadd" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dd45-7759-9eb1-ee97e09adadd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dd45-7759-9eb1-ee97e09adadd" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dd45-7759-9eb1-ee97e09adadd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dd45-7e08-a31c-e1d50cb43c8a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dd45-7759-9eb1-ee97e09adadd" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dd45-7e08-a31c-e1d50cb43c8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_GenesisEnergyLLCMember_019cbeb4-dd45-71e1-80bf-6d8624fdf5d1" xlink:href="gel-20260331.xsd#gel_GenesisEnergyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019cbeb4-dd45-7e08-a31c-e1d50cb43c8a" xlink:to="loc_gel_GenesisEnergyLLCMember_019cbeb4-dd45-71e1-80bf-6d8624fdf5d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cbeb4-dd45-7742-a702-e983209fa895" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_dei_LegalEntityAxis_019cbeb4-dd45-7742-a702-e983209fa895" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cbeb4-dd45-7742-a702-e983209fa895_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019cbeb4-dd45-7742-a702-e983209fa895" xlink:to="loc_dei_EntityDomain_019cbeb4-dd45-7742-a702-e983209fa895_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cbeb4-dd45-7a79-94a6-f69aa3eaaee9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019cbeb4-dd45-7742-a702-e983209fa895" xlink:to="loc_dei_EntityDomain_019cbeb4-dd45-7a79-94a6-f69aa3eaaee9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_GenesisFinanceCorporationMember_019cbeb4-dd45-7b9d-800b-a394dc5c2dc1" xlink:href="gel-20260331.xsd#gel_GenesisFinanceCorporationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cbeb4-dd45-7a79-94a6-f69aa3eaaee9" xlink:to="loc_gel_GenesisFinanceCorporationMember_019cbeb4-dd45-7b9d-800b-a394dc5c2dc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtCovenantPeriodAxis_019cbeb4-dd45-77e3-be98-5e7dc7ea0593" xlink:href="gel-20260331.xsd#gel_DebtCovenantPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_gel_DebtCovenantPeriodAxis_019cbeb4-dd45-77e3-be98-5e7dc7ea0593" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtCovenantPeriodDomain_019cbeb4-dd45-77e3-be98-5e7dc7ea0593_default" xlink:href="gel-20260331.xsd#gel_DebtCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_gel_DebtCovenantPeriodAxis_019cbeb4-dd45-77e3-be98-5e7dc7ea0593" xlink:to="loc_gel_DebtCovenantPeriodDomain_019cbeb4-dd45-77e3-be98-5e7dc7ea0593_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtCovenantPeriodDomain_019cbeb4-dd45-71e9-b73e-05550264762e" xlink:href="gel-20260331.xsd#gel_DebtCovenantPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_gel_DebtCovenantPeriodAxis_019cbeb4-dd45-77e3-be98-5e7dc7ea0593" xlink:to="loc_gel_DebtCovenantPeriodDomain_019cbeb4-dd45-71e9-b73e-05550264762e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019dfe20-8599-76b0-9c5c-c72f8c6616e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019cbeb4-dd45-7eca-bbb8-7217096dee29" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019dfe20-8599-76b0-9c5c-c72f8c6616e3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-76b0-9c5c-c72f8c6616e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019dfe20-8599-76b0-9c5c-c72f8c6616e3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-76b0-9c5c-c72f8c6616e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-7258-b3f9-f019018077b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019dfe20-8599-76b0-9c5c-c72f8c6616e3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-7258-b3f9-f019018077b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019dfe20-8599-733b-8ce3-7a3012bacc7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-7258-b3f9-f019018077b2" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_019dfe20-8599-733b-8ce3-7a3012bacc7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019dfe20-8599-782a-a1ec-74e5dd531585" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-7258-b3f9-f019018077b2" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_019dfe20-8599-782a-a1ec-74e5dd531585" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_019dfe20-8599-7c8a-814a-b25313253392" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019dfe20-8599-7258-b3f9-f019018077b2" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_019dfe20-8599-7c8a-814a-b25313253392" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cbeb4-dd45-74e2-a8b4-050eacdb716f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019cbeb4-dd45-74e2-a8b4-050eacdb716f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_NumberOfAdditionalYears_019dfe1b-0b72-7093-bb6f-3f6198469e63" xlink:href="gel-20260331.xsd#gel_NumberOfAdditionalYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_NumberOfAdditionalYears_019dfe1b-0b72-7093-bb6f-3f6198469e63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_NumberOfOccasionsOptionToExtend_019dfe1b-0b72-72e8-b04d-55246537143b" xlink:href="gel-20260331.xsd#gel_NumberOfOccasionsOptionToExtend"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_NumberOfOccasionsOptionToExtend_019dfe1b-0b72-72e8-b04d-55246537143b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_019cbeb4-dd45-7755-839d-3badeaa8db06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LongTermDebt_019cbeb4-dd45-7755-839d-3badeaa8db06" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-73e5-b0d1-72525f12c257" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019cbeb4-dd45-73e5-b0d1-72525f12c257" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_019dfe20-8599-7009-8b21-6248c1c204b9" xlink:href="gel-20260331.xsd#gel_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_DebtInstrumentCovenantConsolidatedLeverageRatioMaximum_019dfe20-8599-7009-8b21-6248c1c204b9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtInstrumentCovenantInterestCoverageRatioMinimum_019dfe20-8599-7218-95d7-e40394619bae" xlink:href="gel-20260331.xsd#gel_DebtInstrumentCovenantInterestCoverageRatioMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_DebtInstrumentCovenantInterestCoverageRatioMinimum_019dfe20-8599-7218-95d7-e40394619bae" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DebtInstrumentCovenantSeniorSecuredLeverageRatioMaximum_019dfe20-8599-799f-9ae4-7dba97fe9d65" xlink:href="gel-20260331.xsd#gel_DebtInstrumentCovenantSeniorSecuredLeverageRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_DebtInstrumentCovenantSeniorSecuredLeverageRatioMaximum_019dfe20-8599-799f-9ae4-7dba97fe9d65" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cbeb4-dd45-716e-90a8-445f37a2961b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019cbeb4-dd45-716e-90a8-445f37a2961b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_LetterOfCreditFeePercentage_019cbeb4-dd45-7318-9b8b-540989e235d1" xlink:href="gel-20260331.xsd#gel_LetterOfCreditFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_LetterOfCreditFeePercentage_019cbeb4-dd45-7318-9b8b-540989e235d1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019cbeb4-dd45-78eb-b305-824f8de4e2dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_019cbeb4-dd45-78eb-b305-824f8de4e2dc" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_LineOfCreditFacilityAdditionalBorrowingCapacity_019cbeb4-dd45-7cee-8b6f-e9584d0e38ac" xlink:href="gel-20260331.xsd#gel_LineOfCreditFacilityAdditionalBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_gel_LineOfCreditFacilityAdditionalBorrowingCapacity_019cbeb4-dd45-7cee-8b6f-e9584d0e38ac" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019cbeb4-dd45-7e20-ac0b-ab013c3660a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LineOfCredit_019cbeb4-dd45-7e20-ac0b-ab013c3660a4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019cbeb4-dd45-79fe-bd0e-72ce62ee140c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019cbeb4-dd45-79fe-bd0e-72ce62ee140c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cbeb4-dd45-7b64-9fbe-83774a3c7d23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019cbeb4-dd45-7b64-9fbe-83774a3c7d23" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredLongTermDebt_019cbeb4-dd45-7e15-801a-7693e3c98140" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_UnsecuredLongTermDebt_019cbeb4-dd45-7e15-801a-7693e3c98140" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions_019cbeb4-dd45-79bc-824c-4951c03ad378" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions_019cbeb4-dd45-79bc-824c-4951c03ad378" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019de4a2-f1e0-7c38-9888-c28a449d108e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019de4a2-f1e0-7c38-9888-c28a449d108e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_019de4a2-f1e0-7f3d-804d-56e86d142bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_019de4a2-f1e0-7f3d-804d-56e86d142bcf" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfUnsecuredDebt_019de4a2-f1e0-75f5-8070-8996a5bc012c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfUnsecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_RepaymentsOfUnsecuredDebt_019de4a2-f1e0-75f5-8070-8996a5bc012c" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount_019de4a2-f1e0-77d1-9f56-e75e6ccffdf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAmount_019de4a2-f1e0-77d1-9f56-e75e6ccffdf8" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019de4a2-f1e0-74d9-a47f-d31860be6bc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019cbeb4-dd45-7288-9ffa-a525bf458df8" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_019de4a2-f1e0-74d9-a47f-d31860be6bc0" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsCommonCashDistributionsPaidDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#PartnersCapitalMezzanineCapitalandDistributionsCommonCashDistributionsPaidDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsCommonCashDistributionsPaidDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-753b-8a0c-d2aea58ea99c" xlink:href="gel-20260331.xsd#gel_PartnersCapitalAndDistributionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-78cd-8b7e-bcd40d415450" xlink:href="gel-20260331.xsd#gel_PartnersCapitalAndDistributionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-753b-8a0c-d2aea58ea99c" xlink:to="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-78cd-8b7e-bcd40d415450" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-72a8-878e-921b16d73259" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountByClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-78cd-8b7e-bcd40d415450" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-72a8-878e-921b16d73259" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-72a8-878e-921b16d73259_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-72a8-878e-921b16d73259" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-72a8-878e-921b16d73259_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-76df-b95c-d0f1e16b7c2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-72a8-878e-921b16d73259" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-76df-b95c-d0f1e16b7c2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CommonUnitholdersMember_019cbeb4-dd45-7acb-9d13-adefc64a3f7e" xlink:href="gel-20260331.xsd#gel_CommonUnitholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-76df-b95c-d0f1e16b7c2b" xlink:to="loc_gel_CommonUnitholdersMember_019cbeb4-dd45-7acb-9d13-adefc64a3f7e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PreferredUnitholdersMember_019dd5d8-d1dc-7b0e-ab99-373197cdcfbb" xlink:href="gel-20260331.xsd#gel_PreferredUnitholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-76df-b95c-d0f1e16b7c2b" xlink:to="loc_gel_PreferredUnitholdersMember_019dd5d8-d1dc-7b0e-ab99-373197cdcfbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019dd5d8-d1dc-730f-980c-0cbbb771b813" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-78cd-8b7e-bcd40d415450" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019dd5d8-d1dc-730f-980c-0cbbb771b813" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019dd5d8-d1dc-730f-980c-0cbbb771b813_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019dd5d8-d1dc-730f-980c-0cbbb771b813" xlink:to="loc_us-gaap_ClassOfStockDomain_019dd5d8-d1dc-730f-980c-0cbbb771b813_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019dd5d8-d1dc-71df-b0b2-5a7792f2f9a0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019dd5d8-d1dc-730f-980c-0cbbb771b813" xlink:to="loc_us-gaap_ClassOfStockDomain_019dd5d8-d1dc-71df-b0b2-5a7792f2f9a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_019dd5d8-d1dc-76a7-a2a3-de939096390b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019dd5d8-d1dc-71df-b0b2-5a7792f2f9a0" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_019dd5d8-d1dc-76a7-a2a3-de939096390b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019dfe27-6029-7497-ade0-d0a624b766df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-78cd-8b7e-bcd40d415450" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019dfe27-6029-7497-ade0-d0a624b766df" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe27-6029-7497-ade0-d0a624b766df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe27-6029-7497-ade0-d0a624b766df" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe27-6029-7497-ade0-d0a624b766df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe27-6029-7a77-ae86-50671a6e923a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe27-6029-7497-ade0-d0a624b766df" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe27-6029-7a77-ae86-50671a6e923a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019dfe27-7893-717d-93be-528c167fd3b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019dfe27-6029-7a77-ae86-50671a6e923a" xlink:to="loc_us-gaap_SubsequentEventMember_019dfe27-7893-717d-93be-528c167fd3b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerDistributionDate_019cbeb4-dd45-7609-8fe5-6bae46c7b8f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerDistributionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-753b-8a0c-d2aea58ea99c" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerDistributionDate_019cbeb4-dd45-7609-8fe5-6bae46c7b8f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-7f98-995c-c32904e520eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-753b-8a0c-d2aea58ea99c" xlink:to="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-7f98-995c-c32904e520eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-771b-8584-d705ab128332" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-753b-8a0c-d2aea58ea99c" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-771b-8584-d705ab128332" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#PartnersCapitalMezzanineCapitalandDistributionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:href="gel-20260331.xsd#gel_PartnersCapitalAndDistributionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:href="gel-20260331.xsd#gel_PartnersCapitalAndDistributionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dd45-734e-bebe-0ce449578ad6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountAxis_019cbeb4-dd45-7ffd-b8c7-6b2a54f1a91a" xlink:to="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dd45-734e-bebe-0ce449578ad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnerMember_019cbeb4-dd45-7372-a7c9-0f25a196f5f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PartnerTypeOfPartnersCapitalAccountNameDomain_019cbeb4-dd45-734e-bebe-0ce449578ad6" xlink:to="loc_us-gaap_LimitedPartnerMember_019cbeb4-dd45-7372-a7c9-0f25a196f5f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7aa7-b458-d4bdf825204c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7aa7-b458-d4bdf825204c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7aa7-b458-d4bdf825204c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7aa7-b458-d4bdf825204c" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7aa7-b458-d4bdf825204c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7aa7-b458-d4bdf825204c" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019cbeb4-dd45-761c-9791-2bb78b880d58" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:to="loc_us-gaap_CommonClassAMember_019cbeb4-dd45-761c-9791-2bb78b880d58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_019cbeb4-dd45-79ef-898d-e62aab835cd1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:to="loc_us-gaap_CommonClassBMember_019cbeb4-dd45-79ef-898d-e62aab835cd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredClassAMember_019cbeb4-dd45-7be0-8262-0483f7941d06" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:to="loc_us-gaap_PreferredClassAMember_019cbeb4-dd45-7be0-8262-0483f7941d06" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_019cbeb4-dd45-70d6-9e88-e129a6b3cbaf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7fa0-badf-ab5acbb7771f" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_019cbeb4-dd45-70d6-9e88-e129a6b3cbaf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019cbeb4-dd45-7056-8ff6-ab08ca3db3de" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019cbeb4-dd45-7f3e-a389-5d1f85a23cdb" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019cbeb4-dd45-7056-8ff6-ab08ca3db3de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_A2023RepurchaseProgramMember_019cbeb4-dd45-7a3a-a82b-bf91aacb90b7" xlink:href="gel-20260331.xsd#gel_A2023RepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019cbeb4-dd45-7056-8ff6-ab08ca3db3de" xlink:to="loc_gel_A2023RepurchaseProgramMember_019cbeb4-dd45-7a3a-a82b-bf91aacb90b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7909-992a-814758c54fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountByClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7909-992a-814758c54fc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-7909-992a-814758c54fc7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7909-992a-814758c54fc7" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-7909-992a-814758c54fc7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-75ed-a4f4-68df6a3cfc6f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7909-992a-814758c54fc7" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-75ed-a4f4-68df6a3cfc6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PreferredUnitholdersMember_019cbeb4-dd45-7c93-a332-28f9fb84c3d1" xlink:href="gel-20260331.xsd#gel_PreferredUnitholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-75ed-a4f4-68df6a3cfc6f" xlink:to="loc_gel_PreferredUnitholdersMember_019cbeb4-dd45-7c93-a332-28f9fb84c3d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693" xlink:to="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7a0d-a42c-db9e945c33f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-74a3-8cb2-e0e09b0b7693" xlink:to="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7a0d-a42c-db9e945c33f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_019cbeb4-dd45-7fec-81b5-83a6bbd17e43" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7a0d-a42c-db9e945c33f4" xlink:to="loc_srt_AffiliatedEntityMember_019cbeb4-dd45-7fec-81b5-83a6bbd17e43" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019cbeb4-dd45-78ca-bfa5-781516bed802" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_dei_LegalEntityAxis_019cbeb4-dd45-78ca-bfa5-781516bed802" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cbeb4-dd45-78ca-bfa5-781516bed802_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019cbeb4-dd45-78ca-bfa5-781516bed802" xlink:to="loc_dei_EntityDomain_019cbeb4-dd45-78ca-bfa5-781516bed802_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019cbeb4-dd45-7f52-85c4-cbf2337869be" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019cbeb4-dd45-78ca-bfa5-781516bed802" xlink:to="loc_dei_EntityDomain_019cbeb4-dd45-7f52-85c4-cbf2337869be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CameronHighwayOilPipelineMember_019cbeb4-dd45-7611-aa1d-e8123c4f8a98" xlink:href="gel-20260331.xsd#gel_CameronHighwayOilPipelineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cbeb4-dd45-7f52-85c4-cbf2337869be" xlink:to="loc_gel_CameronHighwayOilPipelineMember_019cbeb4-dd45-7611-aa1d-e8123c4f8a98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_IndependenceHubLLCMember_019cbeb4-dd45-709a-90c5-7fbc2fba38ef" xlink:href="gel-20260331.xsd#gel_IndependenceHubLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019cbeb4-dd45-7f52-85c4-cbf2337869be" xlink:to="loc_gel_IndependenceHubLLCMember_019cbeb4-dd45-709a-90c5-7fbc2fba38ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_gel_PartnersCapitalAndDistributionsTable_019cbeb4-dd45-745c-8f17-e5a3d8138bd5" xlink:to="loc_srt_OwnershipAxis_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019cbeb4-dd45-7a7e-903c-6338cc5e7135" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019cbeb4-dd45-720d-b3bb-b0e6c5f8657f" xlink:to="loc_srt_OwnershipDomain_019cbeb4-dd45-7a7e-903c-6338cc5e7135" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_GenesisEnergyLLCMember_019cbeb4-dd45-78fb-b6da-4d55f51ad8ad" xlink:href="gel-20260331.xsd#gel_GenesisEnergyLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019cbeb4-dd45-7a7e-903c-6338cc5e7135" xlink:to="loc_gel_GenesisEnergyLLCMember_019cbeb4-dd45-78fb-b6da-4d55f51ad8ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_019cbeb4-dd45-7c14-8606-14dd10340ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountUnitsOutstanding_019cbeb4-dd45-7c14-8606-14dd10340ae5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_StockRepurchaseProgramPercentageOfSharesAuthorizedToBeRepurchased_019cbeb4-dd45-70b1-bdd3-2bc2d01d07d5" xlink:href="gel-20260331.xsd#gel_StockRepurchaseProgramPercentageOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_gel_StockRepurchaseProgramPercentageOfSharesAuthorizedToBeRepurchased_019cbeb4-dd45-70b1-bdd3-2bc2d01d07d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_019cbeb4-dd45-7c0b-b158-13f1a565fcf9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_srt_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_019cbeb4-dd45-7c0b-b158-13f1a565fcf9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_019cbeb4-dd45-7725-8642-29ef044f6487" xlink:href="gel-20260331.xsd#gel_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_gel_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues_019cbeb4-dd45-7725-8642-29ef044f6487" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_019cbeb4-dd45-7bae-8d7d-d489d85675c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityRedemptionPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_019cbeb4-dd45-7bae-8d7d-d489d85675c2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-7702-b3c6-f9fe7b41d0ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-7702-b3c6-f9fe7b41d0ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-75c8-a7d5-da5bd33d23a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-75c8-a7d5-da5bd33d23a1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders_019cbeb4-dd45-7850-aa75-4af6b4bb1836" xlink:href="gel-20260331.xsd#gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_gel_AccumulatedDistributionsAttributableToClassAPreferredUnitholders_019cbeb4-dd45-7850-aa75-4af6b4bb1836" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_019cbeb4-dd45-7fc8-ac65-9a664a2092f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_TemporaryEquityAccretionToRedemptionValueAdjustment_019cbeb4-dd45-7fc8-ac65-9a664a2092f6" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction_019cbeb4-dd45-7525-a182-356dd6c4ddb3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction_019cbeb4-dd45-7525-a182-356dd6c4ddb3" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019cbeb4-dd45-76ca-b85e-c4ddd69eb748" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_gel_PartnersCapitalAndDistributionsLineItems_019cbeb4-dd45-783f-84dc-cd08b6d10749" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_019cbeb4-dd45-76ca-b85e-c4ddd69eb748" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsPreferredCashDistributionsPaidDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#PartnersCapitalMezzanineCapitalandDistributionsPreferredCashDistributionsPaidDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/PartnersCapitalMezzanineCapitalandDistributionsPreferredCashDistributionsPaidDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityByClassOfStockTable_019cbeb4-dd45-788f-ac85-b1803224da1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityByClassOfStockTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_TemporaryEquityByClassOfStockTable_019cbeb4-dd45-788f-ac85-b1803224da1a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7587-9d5e-92f5a6f4f937" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountByClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_019cbeb4-dd45-788f-ac85-b1803224da1a" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7587-9d5e-92f5a6f4f937" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-7587-9d5e-92f5a6f4f937_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7587-9d5e-92f5a6f4f937" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-7587-9d5e-92f5a6f4f937_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-703d-b892-f850b8da64cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LimitedPartnersCapitalAccountClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountByClassAxis_019cbeb4-dd45-7587-9d5e-92f5a6f4f937" xlink:to="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-703d-b892-f850b8da64cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PreferredUnitholdersMember_019cbeb4-dd45-780b-b199-ad43677e4a1b" xlink:href="gel-20260331.xsd#gel_PreferredUnitholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-703d-b892-f850b8da64cb" xlink:to="loc_gel_PreferredUnitholdersMember_019cbeb4-dd45-780b-b199-ad43677e4a1b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CommonUnitholdersMember_019cbeb4-dd45-7f67-89ff-4a07ff77b90c" xlink:href="gel-20260331.xsd#gel_CommonUnitholdersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LimitedPartnersCapitalAccountClassDomain_019cbeb4-dd45-703d-b892-f850b8da64cb" xlink:to="loc_gel_CommonUnitholdersMember_019cbeb4-dd45-7f67-89ff-4a07ff77b90c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7da2-b0ab-fe762f48f687" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_019cbeb4-dd45-788f-ac85-b1803224da1a" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7da2-b0ab-fe762f48f687" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7da2-b0ab-fe762f48f687_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7da2-b0ab-fe762f48f687" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7da2-b0ab-fe762f48f687_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7a2e-9d2e-36ff91564b64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cbeb4-dd45-7da2-b0ab-fe762f48f687" xlink:to="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7a2e-9d2e-36ff91564b64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertiblePreferredStockMember_019cbeb4-dd45-7376-a379-f6759d779afc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cbeb4-dd45-7a2e-9d2e-36ff91564b64" xlink:to="loc_us-gaap_ConvertiblePreferredStockMember_019cbeb4-dd45-7376-a379-f6759d779afc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019dfe28-1922-711c-95bc-5da8c8b7a22b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_TemporaryEquityByClassOfStockTable_019cbeb4-dd45-788f-ac85-b1803224da1a" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019dfe28-1922-711c-95bc-5da8c8b7a22b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe28-1922-711c-95bc-5da8c8b7a22b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe28-1922-711c-95bc-5da8c8b7a22b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe28-1922-711c-95bc-5da8c8b7a22b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019dfe28-1922-7997-919e-75fcb1a3e016" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019dfe28-1922-711c-95bc-5da8c8b7a22b" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019dfe28-1922-7997-919e-75fcb1a3e016" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019dfe28-26ee-7416-b2e8-9a3eca73f05b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019dfe28-1922-7997-919e-75fcb1a3e016" xlink:to="loc_us-gaap_SubsequentEventMember_019dfe28-26ee-7416-b2e8-9a3eca73f05b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerDistributionDate_019cbeb4-dd45-7b64-97c2-27f17404d187" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerDistributionDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerDistributionDate_019cbeb4-dd45-7b64-97c2-27f17404d187" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-766d-839e-d7fc97d353df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_PartnersCapitalAccountDistributionPerUnitOfLimitedPartnerInterest_019cbeb4-dd45-766d-839e-d7fc97d353df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-74c0-84b4-21302cb42f91" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsPaid_019cbeb4-dd45-74c0-84b4-21302cb42f91" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_019cbeb4-dd45-78be-926f-dec6722e0562" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityRedemptionPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_TemporaryEquityRedemptionPricePerShare_019cbeb4-dd45-78be-926f-dec6722e0562" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared_019de49c-4dc9-74e7-8e5f-cd99ad5f66a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TemporaryEquityLineItems_019cbeb4-dd45-7fd5-b3e9-04ceb86e5876" xlink:to="loc_us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared_019de49c-4dc9-74e7-8e5f-cd99ad5f66a4" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/BusinessSegmentInformationNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#BusinessSegmentInformationNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/BusinessSegmentInformationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-73a1-ae95-4d8e5a1090df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7bba-9466-e2595f6c0c5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-73a1-ae95-4d8e5a1090df" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7bba-9466-e2595f6c0c5c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79d2-92c6-4e115227476f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7bba-9466-e2595f6c0c5c" xlink:to="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79d2-92c6-4e115227476f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-79d2-92c6-4e115227476f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79d2-92c6-4e115227476f" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-79d2-92c6-4e115227476f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7c05-a369-640d1afb98a7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79d2-92c6-4e115227476f" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7c05-a369-640d1afb98a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7b9a-b31c-f455b7ce998c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7c05-a369-640d1afb98a7" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7b9a-b31c-f455b7ce998c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_019cbeb4-dd45-7b82-b9f4-cd59286b46c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7c05-a369-640d1afb98a7" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_019cbeb4-dd45-7b82-b9f4-cd59286b46c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7152-9c10-d4583a5f7bc6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7bba-9466-e2595f6c0c5c" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7152-9c10-d4583a5f7bc6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7152-9c10-d4583a5f7bc6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7152-9c10-d4583a5f7bc6" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7152-9c10-d4583a5f7bc6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7e82-af43-b6f0e471d247" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7152-9c10-d4583a5f7bc6" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7e82-af43-b6f0e471d247" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7529-9b58-5c83e8bfed48" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7e82-af43-b6f0e471d247" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7529-9b58-5c83e8bfed48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-758e-820b-eb63f5c98970" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7e82-af43-b6f0e471d247" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-758e-820b-eb63f5c98970" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-77dd-8ede-fa9f07b3902a" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesAndTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7e82-af43-b6f0e471d247" xlink:to="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-77dd-8ede-fa9f07b3902a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CapitalExpenditures_019cbeb4-dd45-73ba-b829-22ab393d81b5" xlink:href="gel-20260331.xsd#gel_CapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-73a1-ae95-4d8e5a1090df" xlink:to="loc_gel_CapitalExpenditures_019cbeb4-dd45-73ba-b829-22ab393d81b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CapitalExpendituresCostsIncurredPercentage_019cbeb4-dd45-7647-93af-7995ebb08d70" xlink:href="gel-20260331.xsd#gel_CapitalExpendituresCostsIncurredPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-73a1-ae95-4d8e5a1090df" xlink:to="loc_gel_CapitalExpendituresCostsIncurredPercentage_019cbeb4-dd45-7647-93af-7995ebb08d70" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/BusinessSegmentInformationScheduleofSegmentInformationDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#BusinessSegmentInformationScheduleofSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/BusinessSegmentInformationScheduleofSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7988-ae17-fe08aec245f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7988-ae17-fe08aec245f8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-70bd-841d-645b08b50bcd" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7988-ae17-fe08aec245f8" xlink:to="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-70bd-841d-645b08b50bcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-70bd-841d-645b08b50bcd_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-70bd-841d-645b08b50bcd" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-70bd-841d-645b08b50bcd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-74ee-ada9-eaa56edb6c06" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-70bd-841d-645b08b50bcd" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-74ee-ada9-eaa56edb6c06" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7831-8097-fb0d0b8eaad0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-74ee-ada9-eaa56edb6c06" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7831-8097-fb0d0b8eaad0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_019cbeb4-dd45-74fa-b930-8503f2f3ceb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntersegmentEliminationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-74ee-ada9-eaa56edb6c06" xlink:to="loc_us-gaap_IntersegmentEliminationMember_019cbeb4-dd45-74fa-b930-8503f2f3ceb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7cc5-a48a-6203ce2be354" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-7988-ae17-fe08aec245f8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7cc5-a48a-6203ce2be354" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7cc5-a48a-6203ce2be354_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7cc5-a48a-6203ce2be354" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7cc5-a48a-6203ce2be354_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7cc5-a48a-6203ce2be354" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-71c3-a057-8287c1c6aa9c" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-71c3-a057-8287c1c6aa9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-77ef-9e04-7cdf246af928" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-77ef-9e04-7cdf246af928" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-7ebf-859f-ef91ec13e346" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesAndTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:to="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-7ebf-859f-ef91ec13e346" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-77ad-a04e-3866759d9cfa" xlink:href="gel-20260331.xsd#gel_OnshoreTransportationAndServicesSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-741f-8454-bb23712d2bfd" xlink:to="loc_gel_OnshoreTransportationAndServicesSegmentMember_019cbeb4-dd45-77ad-a04e-3866759d9cfa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-7fb8-8c00-759eacc83224" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-7fb8-8c00-759eacc83224" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019cbeb4-dd45-70b1-97d1-aba9246158d1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_us-gaap_OperatingExpenses_019cbeb4-dd45-70b1-97d1-aba9246158d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019cbeb4-dd45-751f-ab28-2e9a8a304668" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019cbeb4-dd45-751f-ab28-2e9a8a304668" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019cbeb4-dd45-763d-b2a1-0ae040584492" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019cbeb4-dd45-763d-b2a1-0ae040584492" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_SegmentMargin_019cbeb4-dd45-7af5-8572-e667c2632901" xlink:href="gel-20260331.xsd#gel_SegmentMargin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-7b1f-8206-a761efa74696" xlink:to="loc_gel_SegmentMargin_019cbeb4-dd45-7af5-8572-e667c2632901" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/BusinessSegmentInformationScheduleofTotalAssetsandTotalGrowthandMaintenanceCapitalExpendituresbyReportableSegmentDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#BusinessSegmentInformationScheduleofTotalAssetsandTotalGrowthandMaintenanceCapitalExpendituresbyReportableSegmentDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/BusinessSegmentInformationScheduleofTotalAssetsandTotalGrowthandMaintenanceCapitalExpendituresbyReportableSegmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-726c-ac0e-5c3df2efa4e9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-736f-9513-3d7ad7a0a248" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-726c-ac0e-5c3df2efa4e9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-736f-9513-3d7ad7a0a248" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79af-abc6-da2eb5c6670a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-736f-9513-3d7ad7a0a248" xlink:to="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79af-abc6-da2eb5c6670a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-79af-abc6-da2eb5c6670a_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79af-abc6-da2eb5c6670a" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-79af-abc6-da2eb5c6670a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7a8a-8bce-f2930ef5671b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019cbeb4-dd45-79af-abc6-da2eb5c6670a" xlink:to="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7a8a-8bce-f2930ef5671b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7021-b7d1-7bd6f07523f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7a8a-8bce-f2930ef5671b" xlink:to="loc_us-gaap_OperatingSegmentsMember_019cbeb4-dd45-7021-b7d1-7bd6f07523f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_019cbeb4-dd45-7a60-ae0f-012abde881f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateNonSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7a8a-8bce-f2930ef5671b" xlink:to="loc_us-gaap_CorporateNonSegmentMember_019cbeb4-dd45-7a60-ae0f-012abde881f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_019cbeb4-dd45-7227-8818-a6f8b03d0d3f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MaterialReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019cbeb4-dd45-7a8a-8bce-f2930ef5671b" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_019cbeb4-dd45-7227-8818-a6f8b03d0d3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019cbeb4-dd45-736f-9513-3d7ad7a0a248" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019cbeb4-dd45-799d-9f61-801f1a0f154a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019cbeb4-dd45-7fc0-9fd9-840cf4dca57c" xlink:to="loc_us-gaap_SegmentDomain_019cbeb4-dd45-799d-9f61-801f1a0f154a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7b67-b451-20259ace7f22" xlink:href="gel-20260331.xsd#gel_OffshorePipelineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-799d-9f61-801f1a0f154a" xlink:to="loc_gel_OffshorePipelineTransportationSegmentMember_019cbeb4-dd45-7b67-b451-20259ace7f22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-73a6-9e93-10819f8bc6c3" xlink:href="gel-20260331.xsd#gel_MarineTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-799d-9f61-801f1a0f154a" xlink:to="loc_gel_MarineTransportationSegmentMember_019cbeb4-dd45-73a6-9e93-10819f8bc6c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-78f6-bac4-1c58ad70dcea" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesAndTransportationSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019cbeb4-dd45-799d-9f61-801f1a0f154a" xlink:to="loc_gel_OnshoreFacilitiesAndTransportationSegmentMember_019cbeb4-dd45-78f6-bac4-1c58ad70dcea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019cbeb4-dd45-7c90-9116-61e94bef0f14" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-726c-ac0e-5c3df2efa4e9" xlink:to="loc_us-gaap_Assets_019cbeb4-dd45-7c90-9116-61e94bef0f14" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CapitalExpenditures_019cbeb4-dd45-755b-8e15-b4246bfba5b5" xlink:href="gel-20260331.xsd#gel_CapitalExpenditures"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-726c-ac0e-5c3df2efa4e9" xlink:to="loc_gel_CapitalExpenditures_019cbeb4-dd45-755b-8e15-b4246bfba5b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_CapitalExpendituresCostsIncurredPercentage_019cbeb4-dd45-79a6-8ae3-ce1ded2b72b5" xlink:href="gel-20260331.xsd#gel_CapitalExpendituresCostsIncurredPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019cbeb4-dd45-726c-ac0e-5c3df2efa4e9" xlink:to="loc_gel_CapitalExpendituresCostsIncurredPercentage_019cbeb4-dd45-79a6-8ae3-ce1ded2b72b5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/TransactionswithRelatedPartiesScheduleofTransactionswithRelatedPartiesDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#TransactionswithRelatedPartiesScheduleofTransactionswithRelatedPartiesDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/TransactionswithRelatedPartiesScheduleofTransactionswithRelatedPartiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cbeb4-dd45-7641-bdcf-c7bcdb036fae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cbeb4-dd45-7641-bdcf-c7bcdb036fae" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-7831-8429-f5c86472ac76" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cbeb4-dd45-7641-bdcf-c7bcdb036fae" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-7831-8429-f5c86472ac76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7831-8429-f5c86472ac76_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-7831-8429-f5c86472ac76" xlink:to="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7831-8429-f5c86472ac76_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7bcf-b9b6-b2d8907a9e7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019cbeb4-dd45-7831-8429-f5c86472ac76" xlink:to="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7bcf-b9b6-b2d8907a9e7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PoseidonOilPipelineCompanyMember_019cbeb4-dd45-7305-a627-060319de462a" xlink:href="gel-20260331.xsd#gel_PoseidonOilPipelineCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7bcf-b9b6-b2d8907a9e7a" xlink:to="loc_gel_PoseidonOilPipelineCompanyMember_019cbeb4-dd45-7305-a627-060319de462a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_019cbeb4-dd45-7288-b23f-76db1a042507" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7bcf-b9b6-b2d8907a9e7a" xlink:to="loc_srt_ChiefExecutiveOfficerMember_019cbeb4-dd45-7288-b23f-76db1a042507" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvesteeMember_019cbeb4-dd45-7908-b424-02a937074932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvesteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019cbeb4-dd45-7bcf-b9b6-b2d8907a9e7a" xlink:to="loc_us-gaap_EquityMethodInvesteeMember_019cbeb4-dd45-7908-b424-02a937074932" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cbeb4-dd45-77ce-92cb-c14c237a18cf" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cbeb4-dd45-7641-bdcf-c7bcdb036fae" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cbeb4-dd45-77ce-92cb-c14c237a18cf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cbeb4-dd45-77ce-92cb-c14c237a18cf_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cbeb4-dd45-77ce-92cb-c14c237a18cf" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cbeb4-dd45-77ce-92cb-c14c237a18cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019cbeb4-dd45-718a-a8c1-401e6fcd5182" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019cbeb4-dd45-77ce-92cb-c14c237a18cf" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019cbeb4-dd45-718a-a8c1-401e6fcd5182" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_PoseidonOilPipelineCompanyMember_019cbeb4-dd45-76ff-bef3-9f4dcd7bc071" xlink:href="gel-20260331.xsd#gel_PoseidonOilPipelineCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019cbeb4-dd45-718a-a8c1-401e6fcd5182" xlink:to="loc_gel_PoseidonOilPipelineCompanyMember_019cbeb4-dd45-76ff-bef3-9f4dcd7bc071" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-7cec-aacf-9ce283a3e99f" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019cbeb4-dd45-7641-bdcf-c7bcdb036fae" xlink:to="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-7cec-aacf-9ce283a3e99f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7cec-aacf-9ce283a3e99f_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-7cec-aacf-9ce283a3e99f" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-7cec-aacf-9ce283a3e99f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-70de-863a-a9138e27b36d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd45-7cec-aacf-9ce283a3e99f" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-70de-863a-a9138e27b36d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_FeesMember_019cbeb4-dd45-7fbf-b596-766f539fcd67" xlink:href="gel-20260331.xsd#gel_FeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd45-70de-863a-a9138e27b36d" xlink:to="loc_gel_FeesMember_019cbeb4-dd45-7fbf-b596-766f539fcd67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-7662-9cb6-f48413af2396" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019cbeb4-dd45-7662-9cb6-f48413af2396" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherExpenses_019cbeb4-dd45-7a37-9f02-90db23477bb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:to="loc_us-gaap_OtherExpenses_019cbeb4-dd45-7a37-9f02-90db23477bb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cbeb4-dd45-75ba-aa82-2d18d8e22f6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_019cbeb4-dd45-75ba-aa82-2d18d8e22f6d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivables_019cbeb4-dd45-77f6-b391-cb000970a6c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019cbeb4-dd45-7162-927b-df4aae032ee3" xlink:to="loc_us-gaap_OtherReceivables_019cbeb4-dd45-77f6-b391-cb000970a6c0" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DerivativesScheduleofOutstandingDerivativesEnteredIntotoHedgeInventoryorFixedPricePurchaseCommitmentsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DerivativesScheduleofOutstandingDerivativesEnteredIntotoHedgeInventoryorFixedPricePurchaseCommitmentsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DerivativesScheduleofOutstandingDerivativesEnteredIntotoHedgeInventoryorFixedPricePurchaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019dd5d7-c346-7df1-b3f5-fc4d232aa3bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019dd5d7-c346-7df1-b3f5-fc4d232aa3bb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyAxis_019dd5d7-c346-7e34-8000-7406aa855b23" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:to="loc_srt_EnergyAxis_019dd5d7-c346-7e34-8000-7406aa855b23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_019dd5d7-c346-7e34-8000-7406aa855b23_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_EnergyAxis_019dd5d7-c346-7e34-8000-7406aa855b23" xlink:to="loc_srt_EnergyDomain_019dd5d7-c346-7e34-8000-7406aa855b23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EnergyDomain_019dd5d7-c346-73b0-9d83-acc15a462465" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EnergyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_EnergyAxis_019dd5d7-c346-7e34-8000-7406aa855b23" xlink:to="loc_srt_EnergyDomain_019dd5d7-c346-73b0-9d83-acc15a462465" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CrudeOilMember_019dd5d7-c346-7cd7-9f1b-0adbd9e2f58c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CrudeOilMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EnergyDomain_019dd5d7-c346-73b0-9d83-acc15a462465" xlink:to="loc_srt_CrudeOilMember_019dd5d7-c346-7cd7-9f1b-0adbd9e2f58c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019dd5d7-c346-7a11-99e5-0cddc2815442" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019dd5d7-c346-7a11-99e5-0cddc2815442" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7a11-99e5-0cddc2815442_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019dd5d7-c346-7a11-99e5-0cddc2815442" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7a11-99e5-0cddc2815442_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019dd5d7-c346-7a11-99e5-0cddc2815442" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FutureMember_019dd5d7-c346-7c20-8905-cc0f52cef384" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FutureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:to="loc_us-gaap_FutureMember_019dd5d7-c346-7c20-8905-cc0f52cef384" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_DifferentialMember_019dd5d7-c346-7d4e-a710-d143de295dd1" xlink:href="gel-20260331.xsd#gel_DifferentialMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:to="loc_gel_DifferentialMember_019dd5d7-c346-7d4e-a710-d143de295dd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SwapMember_019dd5d7-c346-7370-a377-41fe45b0a32c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:to="loc_us-gaap_SwapMember_019dd5d7-c346-7370-a377-41fe45b0a32c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OptionMember_019dd5d7-c346-7d11-a334-22fa982863bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019dd5d7-c346-7aa5-8351-23cd6057b2a2" xlink:to="loc_us-gaap_OptionMember_019dd5d7-c346-7d11-a334-22fa982863bc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019dd5d7-c346-7a9b-890c-0597441e0308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:to="loc_us-gaap_HedgingDesignationAxis_019dd5d7-c346-7a9b-890c-0597441e0308" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7a9b-890c-0597441e0308_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019dd5d7-c346-7a9b-890c-0597441e0308" xlink:to="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7a9b-890c-0597441e0308_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7430-929d-3cb1794e3228" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019dd5d7-c346-7a9b-890c-0597441e0308" xlink:to="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7430-929d-3cb1794e3228" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019dd5d7-c346-7d1e-94a0-e147babc7308" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7430-929d-3cb1794e3228" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019dd5d7-c346-7d1e-94a0-e147babc7308" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019dd5d7-c346-7e8a-97a3-e8e4d6e901a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019dd5d7-c346-7430-929d-3cb1794e3228" xlink:to="loc_us-gaap_NondesignatedMember_019dd5d7-c346-7e8a-97a3-e8e4d6e901a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionAxis_019dd5d7-c346-753c-80ce-dcf3d96cd371" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019dd5d7-c346-72d3-be0f-fa1ee1675402" xlink:to="loc_us-gaap_PositionAxis_019dd5d7-c346-753c-80ce-dcf3d96cd371" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019dd5d7-c346-753c-80ce-dcf3d96cd371_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PositionAxis_019dd5d7-c346-753c-80ce-dcf3d96cd371" xlink:to="loc_us-gaap_PositionDomain_019dd5d7-c346-753c-80ce-dcf3d96cd371_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PositionDomain_019dd5d7-c346-7ab7-a7b6-6184c4484985" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PositionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PositionAxis_019dd5d7-c346-753c-80ce-dcf3d96cd371" xlink:to="loc_us-gaap_PositionDomain_019dd5d7-c346-7ab7-a7b6-6184c4484985" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortMember_019dd5d7-c346-7f19-9c52-925e67e73df8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019dd5d7-c346-7ab7-a7b6-6184c4484985" xlink:to="loc_us-gaap_ShortMember_019dd5d7-c346-7f19-9c52-925e67e73df8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongMember_019dd5d7-c346-70ed-9231-2fb058ed109b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PositionDomain_019dd5d7-c346-7ab7-a7b6-6184c4484985" xlink:to="loc_us-gaap_LongMember_019dd5d7-c346-70ed-9231-2fb058ed109b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_019dd5d7-c346-70b9-a48e-f16c80acfb74" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNonmonetaryNotionalAmountVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019dd5d7-c346-7df1-b3f5-fc4d232aa3bb" xlink:to="loc_us-gaap_DerivativeNonmonetaryNotionalAmountVolume_019dd5d7-c346-70b9-a48e-f16c80acfb74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderlyingDerivativeVolume_019dd5d7-c346-7162-8319-0fd0d24820cb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnderlyingDerivativeVolume"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019dd5d7-c346-7df1-b3f5-fc4d232aa3bb" xlink:to="loc_us-gaap_UnderlyingDerivativeVolume_019dd5d7-c346-7162-8319-0fd0d24820cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_UnderlyingDerivativeVolumeWeightedAverageContractPrice_019dd5d7-c346-70c3-b678-05b3a31b2a4c" xlink:href="gel-20260331.xsd#gel_UnderlyingDerivativeVolumeWeightedAverageContractPrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019dd5d7-c346-7df1-b3f5-fc4d232aa3bb" xlink:to="loc_gel_UnderlyingDerivativeVolumeWeightedAverageContractPrice_019dd5d7-c346-70c3-b678-05b3a31b2a4c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DerivativesScheduleofFairValueofDerivativeAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DerivativesScheduleofFairValueofDerivativeAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DerivativesScheduleofFairValueofDerivativeAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cbeb4-dd45-7247-aac8-3f467559fac8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cbeb4-dd45-7247-aac8-3f467559fac8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd45-7726-8406-075cf1beb4e0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cbeb4-dd45-7247-aac8-3f467559fac8" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd45-7726-8406-075cf1beb4e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-7726-8406-075cf1beb4e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd45-7726-8406-075cf1beb4e0" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-7726-8406-075cf1beb4e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-719b-9500-d733b030379a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd45-7726-8406-075cf1beb4e0" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-719b-9500-d733b030379a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cbeb4-dd45-70a5-ba8c-983eb6a539c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-719b-9500-d733b030379a" xlink:to="loc_us-gaap_NondesignatedMember_019cbeb4-dd45-70a5-ba8c-983eb6a539c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cbeb4-dd45-7396-8feb-5a273e237bd4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd45-719b-9500-d733b030379a" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cbeb4-dd45-7396-8feb-5a273e237bd4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd45-7763-8eee-b52c38f1b023" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cbeb4-dd45-7247-aac8-3f467559fac8" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd45-7763-8eee-b52c38f1b023" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd45-7763-8eee-b52c38f1b023_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd45-7763-8eee-b52c38f1b023" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd45-7763-8eee-b52c38f1b023_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd45-7bbb-b163-c8b6b8f7f06e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd45-7763-8eee-b52c38f1b023" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd45-7bbb-b163-c8b6b8f7f06e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cbeb4-dd45-74a9-b5c5-5fa155a223ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd45-7bbb-b163-c8b6b8f7f06e" xlink:to="loc_us-gaap_CommodityContractMember_019cbeb4-dd45-74a9-b5c5-5fa155a223ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-700e-bbb0-8e83a9046d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019cbeb4-dd45-7247-aac8-3f467559fac8" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-700e-bbb0-8e83a9046d6c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-700e-bbb0-8e83a9046d6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-700e-bbb0-8e83a9046d6c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-700e-bbb0-8e83a9046d6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-75e9-9afb-e5e01a87ae46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019cbeb4-dd45-700e-bbb0-8e83a9046d6c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-75e9-9afb-e5e01a87ae46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentAssetsMember_019cbeb4-dd45-7f61-bb0b-db64ff8b7d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019cbeb4-dd45-75e9-9afb-e5e01a87ae46" xlink:to="loc_us-gaap_OtherCurrentAssetsMember_019cbeb4-dd45-7f61-bb0b-db64ff8b7d6c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cbeb4-dd46-7a48-8e31-5e491da37dd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019cbeb4-dd46-7a48-8e31-5e491da37dd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cbeb4-dd46-7871-9ce8-20f99203a557" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeAssetFairValueGrossLiability_019cbeb4-dd46-7871-9ce8-20f99203a557" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_019cbeb4-dd46-705e-8135-324899a1e9aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeAssets_019cbeb4-dd46-705e-8135-324899a1e9aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cbeb4-dd46-7cbd-9e2e-a8ec81459cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019cbeb4-dd46-7cbd-9e2e-a8ec81459cc0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cbeb4-dd46-7d8c-b65f-0d769417895f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueGrossAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeLiabilityFairValueGrossAsset_019cbeb4-dd46-7d8c-b65f-0d769417895f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_019cbeb4-dd46-767d-af7f-783797c36bd9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019cbeb4-dd46-7546-b501-bd74d578ab16" xlink:to="loc_us-gaap_DerivativeLiabilities_019cbeb4-dd46-767d-af7f-783797c36bd9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/DerivativesScheduleofEffectonOperatingResultsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#DerivativesScheduleofEffectonOperatingResultsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/DerivativesScheduleofEffectonOperatingResultsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cbeb4-dd46-72f4-a4cc-d52b2ca4b34f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cbeb4-dd46-7e60-aa1d-aa156cc78111" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cbeb4-dd46-72f4-a4cc-d52b2ca4b34f" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cbeb4-dd46-7e60-aa1d-aa156cc78111" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd46-7656-b04b-b1647c19a7f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cbeb4-dd46-7e60-aa1d-aa156cc78111" xlink:to="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd46-7656-b04b-b1647c19a7f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7656-b04b-b1647c19a7f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd46-7656-b04b-b1647c19a7f2" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7656-b04b-b1647c19a7f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7607-89e8-d7bb853ea6be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019cbeb4-dd46-7656-b04b-b1647c19a7f2" xlink:to="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7607-89e8-d7bb853ea6be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cbeb4-dd46-7bce-b407-84e167ed610f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7607-89e8-d7bb853ea6be" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019cbeb4-dd46-7bce-b407-84e167ed610f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019cbeb4-dd46-738d-9798-be1eaf2544fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019cbeb4-dd46-7607-89e8-d7bb853ea6be" xlink:to="loc_us-gaap_NondesignatedMember_019cbeb4-dd46-738d-9798-be1eaf2544fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cbeb4-dd46-7e60-aa1d-aa156cc78111" xlink:to="loc_srt_ProductOrServiceAxis_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-774a-a597-c2c5e7d81e32" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019cbeb4-dd46-71b6-aeb3-9ac8b4c1849b" xlink:to="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-774a-a597-c2c5e7d81e32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesandTransportationProductCostsMember_019cbeb4-dd46-7f23-9ee2-4b8655dabc92" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesandTransportationProductCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-774a-a597-c2c5e7d81e32" xlink:to="loc_gel_OnshoreFacilitiesandTransportationProductCostsMember_019cbeb4-dd46-7f23-9ee2-4b8655dabc92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gel_OnshoreFacilitiesandTransportationProductCostsSodiumMineralsandSulfurServicesOperatingcostsMember_019cbeb4-dd46-7b94-8b43-0eb0ab07e8d2" xlink:href="gel-20260331.xsd#gel_OnshoreFacilitiesandTransportationProductCostsSodiumMineralsandSulfurServicesOperatingcostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019cbeb4-dd46-774a-a597-c2c5e7d81e32" xlink:to="loc_gel_OnshoreFacilitiesandTransportationProductCostsSodiumMineralsandSulfurServicesOperatingcostsMember_019cbeb4-dd46-7b94-8b43-0eb0ab07e8d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd46-7bd5-b080-107870b6c7f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019cbeb4-dd46-7e60-aa1d-aa156cc78111" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd46-7bd5-b080-107870b6c7f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd46-7bd5-b080-107870b6c7f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd46-7bd5-b080-107870b6c7f8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd46-7bd5-b080-107870b6c7f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd46-7106-9c35-815a087354dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019cbeb4-dd46-7bd5-b080-107870b6c7f8" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd46-7106-9c35-815a087354dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cbeb4-dd46-76d9-8107-38ff066cf08f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019cbeb4-dd46-7106-9c35-815a087354dc" xlink:to="loc_us-gaap_CommodityContractMember_019cbeb4-dd46-76d9-8107-38ff066cf08f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019cbeb4-dd46-77c2-9ef1-3f89c600ac4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019cbeb4-dd46-72f4-a4cc-d52b2ca4b34f" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019cbeb4-dd46-77c2-9ef1-3f89c600ac4b" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/FairValueMeasurementsPlacementofAssetsandLiabilitiesWithintheFairValueHierarchyLevelsDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#FairValueMeasurementsPlacementofAssetsandLiabilitiesWithintheFairValueHierarchyLevelsDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/FairValueMeasurementsPlacementofAssetsandLiabilitiesWithintheFairValueHierarchyLevelsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7ef4-8ba0-5e7cf8c386bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-7064-bb90-c2e1835dfcbb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7ef4-8ba0-5e7cf8c386bc" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-7064-bb90-c2e1835dfcbb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-7064-bb90-c2e1835dfcbb" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cbeb4-dd46-7dd3-bbf4-ae6adfbe043c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_019cbeb4-dd46-7f2e-9c9a-a9b726f9b54d" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cbeb4-dd46-7dd3-bbf4-ae6adfbe043c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_019cbeb4-dd46-706e-a11c-d020b38def10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_019cbeb4-dd46-7dd3-bbf4-ae6adfbe043c" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_019cbeb4-dd46-706e-a11c-d020b38def10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-7064-bb90-c2e1835dfcbb" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7b58-a425-e953f43f058a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019cbeb4-dd46-7f0d-b3e7-7d5c15b7ecd6" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7b58-a425-e953f43f058a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_019cbeb4-dd46-7ec1-81bf-33a5666f5df0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7b58-a425-e953f43f058a" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_019cbeb4-dd46-7ec1-81bf-33a5666f5df0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019cbeb4-dd46-7618-909f-5e0b195fa42e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7b58-a425-e953f43f058a" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019cbeb4-dd46-7618-909f-5e0b195fa42e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_019cbeb4-dd46-708e-bbe2-fc8414a0e215" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019cbeb4-dd46-7b58-a425-e953f43f058a" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_019cbeb4-dd46-708e-bbe2-fc8414a0e215" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019cbeb4-dd46-7320-b174-92647e14b68c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-7064-bb90-c2e1835dfcbb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019cbeb4-dd46-7320-b174-92647e14b68c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cbeb4-dd46-7320-b174-92647e14b68c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cbeb4-dd46-7320-b174-92647e14b68c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cbeb4-dd46-7320-b174-92647e14b68c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cbeb4-dd46-7cb2-9a26-3b4012e558fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019cbeb4-dd46-7320-b174-92647e14b68c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cbeb4-dd46-7cb2-9a26-3b4012e558fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommodityContractMember_019cbeb4-dd46-7dae-b953-83cf1b3a6f52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommodityContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019cbeb4-dd46-7cb2-9a26-3b4012e558fe" xlink:to="loc_us-gaap_CommodityContractMember_019cbeb4-dd46-7dae-b953-83cf1b3a6f52" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_019cbeb4-dd46-7743-a93f-339ff696372c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7ef4-8ba0-5e7cf8c386bc" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_019cbeb4-dd46-7743-a93f-339ff696372c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_019cbeb4-dd46-77fb-8524-6cfae3feef4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7ef4-8ba0-5e7cf8c386bc" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_019cbeb4-dd46-77fb-8524-6cfae3feef4e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.genesisenergy.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="gel-20260331.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.genesisenergy.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7888-b7cf-431478c4c20d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-74e0-8c28-36fc2616de37" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7888-b7cf-431478c4c20d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-74e0-8c28-36fc2616de37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd46-7262-bf6e-316f0a99c22e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_019cbeb4-dd46-74e0-8c28-36fc2616de37" xlink:to="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd46-7262-bf6e-316f0a99c22e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd46-7262-bf6e-316f0a99c22e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd46-7262-bf6e-316f0a99c22e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd46-7262-bf6e-316f0a99c22e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd46-7e4f-afa4-bf3bdfd51699" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019cbeb4-dd46-7262-bf6e-316f0a99c22e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019cbeb4-dd46-7e4f-afa4-bf3bdfd51699" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredLongTermDebt_019cbeb4-dd46-7470-8bd3-ca72712bdd8f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnsecuredLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7888-b7cf-431478c4c20d" xlink:to="loc_us-gaap_UnsecuredLongTermDebt_019cbeb4-dd46-7470-8bd3-ca72712bdd8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019cbeb4-dd46-72cb-a5b0-8ebdc135f49c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_019cbeb4-dd46-7888-b7cf-431478c4c20d" xlink:to="loc_us-gaap_LongTermDebtFairValue_019cbeb4-dd46-72cb-a5b0-8ebdc135f49c" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
