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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e024b-3ecd-76bc-ae82-0fa298311730,g:0f9ea59a-50a1-48dc-a62f-9c5140e8f6d1-->
<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://gxo.com/role/Cover" xlink:type="simple" xlink:href="gxo-20260630.xsd#Cover"/>
  <link:definitionLink xlink:role="http://gxo.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_019e024b-3f78-7072-8304-b579189616b7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentInformationTable_019e024b-3f78-7072-8304-b579189616b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019e024b-3f78-7dda-af58-dd94109c647d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_019e024b-3f78-7072-8304-b579189616b7" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019e024b-3f78-7dda-af58-dd94109c647d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7dda-af58-dd94109c647d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e024b-3f78-7dda-af58-dd94109c647d" xlink:to="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7dda-af58-dd94109c647d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7010-8e4e-855e0fdb2eec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019e024b-3f78-7dda-af58-dd94109c647d" xlink:to="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7010-8e4e-855e0fdb2eec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e024b-3f78-78bf-8329-cd1664481f3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7010-8e4e-855e0fdb2eec" xlink:to="loc_us-gaap_CommonStockMember_019e024b-3f78-78bf-8329-cd1664481f3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_A3.750NotesDue2030Member_019e024b-3f78-77c3-bc7a-d137dbe0629c" xlink:href="gxo-20260630.xsd#gxo_A3.750NotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019e024b-3f78-7010-8e4e-855e0fdb2eec" xlink:to="loc_gxo_A3.750NotesDue2030Member_019e024b-3f78-77c3-bc7a-d137dbe0629c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e024b-3f78-79a3-b25a-4325fc16f6d1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentType_019e024b-3f78-79a3-b25a-4325fc16f6d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_019e024b-3f78-722d-9348-aa94745afbf6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentQuarterlyReport_019e024b-3f78-722d-9348-aa94745afbf6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e024b-3f78-78fc-a332-195ec68da584" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentPeriodEndDate_019e024b-3f78-78fc-a332-195ec68da584" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_019e024b-3f78-7021-a798-6c9faf01d4c6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentTransitionReport_019e024b-3f78-7021-a798-6c9faf01d4c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e024b-3f78-7c20-b2dc-cc64b24fc526" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityFileNumber_019e024b-3f78-7c20-b2dc-cc64b24fc526" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e024b-3f78-7a26-ac9c-0fa341d02df6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityRegistrantName_019e024b-3f78-7a26-ac9c-0fa341d02df6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e024b-3f78-7b58-b880-9be09bb44832" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e024b-3f78-7b58-b880-9be09bb44832" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e024b-3f78-762f-803c-6fe9ea15246d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e024b-3f78-762f-803c-6fe9ea15246d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e024b-3f78-7d82-9219-de242175d847" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityAddressAddressLine1_019e024b-3f78-7d82-9219-de242175d847" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e024b-3f78-7e32-85d8-db0a44d04a24" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityAddressCityOrTown_019e024b-3f78-7e32-85d8-db0a44d04a24" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e024b-3f78-7823-9725-0ac67ec90414" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityAddressStateOrProvince_019e024b-3f78-7823-9725-0ac67ec90414" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e024b-3f78-70b4-9e60-ba3519c30f38" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityAddressPostalZipCode_019e024b-3f78-70b4-9e60-ba3519c30f38" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e024b-3f78-7f22-b2a2-630380366911" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_CityAreaCode_019e024b-3f78-7f22-b2a2-630380366911" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e024b-3f78-7b59-89f0-108e26abe661" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_LocalPhoneNumber_019e024b-3f78-7b59-89f0-108e26abe661" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e024b-3f78-7526-a9ac-109b8cd19238" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_Security12bTitle_019e024b-3f78-7526-a9ac-109b8cd19238" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e024b-3f78-7f18-bcae-9352100ddbaa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_TradingSymbol_019e024b-3f78-7f18-bcae-9352100ddbaa" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e024b-3f78-71b4-bfa0-2aff07c73258" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_SecurityExchangeName_019e024b-3f78-71b4-bfa0-2aff07c73258" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_019e024b-3f78-77f0-a799-3dacd964d024" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityCurrentReportingStatus_019e024b-3f78-77f0-a799-3dacd964d024" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_019e024b-3f78-7287-8eb5-52bb9509fb16" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityInteractiveDataCurrent_019e024b-3f78-7287-8eb5-52bb9509fb16" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_019e024b-3f78-78e1-ad6f-3c779fd98b1a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityFilerCategory_019e024b-3f78-78e1-ad6f-3c779fd98b1a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_019e024b-3f78-7b3c-aac3-a338d642a4d5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntitySmallBusiness_019e024b-3f78-7b3c-aac3-a338d642a4d5" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e024b-3f78-7d25-9644-0edf95cd97a1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e024b-3f78-7d25-9644-0edf95cd97a1" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_019e024b-3f78-7033-aea4-fd2840851fa8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityShellCompany_019e024b-3f78-7033-aea4-fd2840851fa8" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_019e024b-3f78-7f0b-8212-e2c86f645523" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_019e024b-3f78-7f0b-8212-e2c86f645523" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e024b-3f78-763b-8b47-91a738282a45" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_AmendmentFlag_019e024b-3f78-763b-8b47-91a738282a45" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_019e024b-3f78-722e-985a-76240289730e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentFiscalYearFocus_019e024b-3f78-722e-985a-76240289730e" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_019e024b-3f78-793f-a7c1-bbe1521772cb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_DocumentFiscalPeriodFocus_019e024b-3f78-793f-a7c1-bbe1521772cb" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e024b-3f78-7c33-99b2-0b8cdcc423f3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_EntityCentralIndexKey_019e024b-3f78-7c33-99b2-0b8cdcc423f3" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019e024b-3f78-7218-a65b-7a7144f61d53" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_019e024b-3f78-7663-9f7f-68c1900723bc" xlink:to="loc_dei_CurrentFiscalYearEndDate_019e024b-3f78-7218-a65b-7a7144f61d53" xlink:type="arc" order="28"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/CondensedConsolidatedStatementsofChangesinEquityUnaudited" xlink:type="simple" xlink:href="gxo-20260630.xsd#CondensedConsolidatedStatementsofChangesinEquityUnaudited"/>
  <link:definitionLink xlink:role="http://gxo.com/role/CondensedConsolidatedStatementsofChangesinEquityUnaudited" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019e024b-402b-769d-ab8e-68249cae8f23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019e024b-402b-7bc3-9ef9-75b2488c80ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019e024b-402b-769d-ab8e-68249cae8f23" xlink:to="loc_us-gaap_StatementTable_019e024b-402b-7bc3-9ef9-75b2488c80ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-72f7-8922-79e7e64f305f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019e024b-402b-7bc3-9ef9-75b2488c80ab" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-72f7-8922-79e7e64f305f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e024b-402b-72f7-8922-79e7e64f305f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-72f7-8922-79e7e64f305f" xlink:to="loc_us-gaap_EquityComponentDomain_019e024b-402b-72f7-8922-79e7e64f305f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e024b-402b-751b-8a26-9db837579340" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-72f7-8922-79e7e64f305f" xlink:to="loc_us-gaap_EquityComponentDomain_019e024b-402b-751b-8a26-9db837579340" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-751b-8a26-9db837579340" xlink:to="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019e024b-402b-70bc-abb4-f50a1808ea5a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:to="loc_us-gaap_CommonStockMember_019e024b-402b-70bc-abb4-f50a1808ea5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019e024b-402b-7546-b802-8732c97a872e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019e024b-402b-7546-b802-8732c97a872e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019e024b-402b-7499-a128-e52d5661576d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019e024b-402b-7499-a128-e52d5661576d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019e024b-402b-7570-bc00-ca0fe096960e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:to="loc_us-gaap_RetainedEarningsMember_019e024b-402b-7570-bc00-ca0fe096960e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e024b-402b-7529-bb73-50780a056f7d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019e024b-402b-794d-8317-eb51cb1972a7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e024b-402b-7529-bb73-50780a056f7d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019e024b-402b-782b-9599-1839dd271647" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-751b-8a26-9db837579340" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019e024b-402b-782b-9599-1839dd271647" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019e024b-402b-769d-ab8e-68249cae8f23" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e024b-402b-7861-a1de-b9a4a5727806" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019e024b-402b-7861-a1de-b9a4a5727806" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-7e79-a5c4-6e5ec0b86e70" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-7e79-a5c4-6e5ec0b86e70" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e024b-402b-70b1-b254-86d2ec9b79de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_ProfitLoss_019e024b-402b-70b1-b254-86d2ec9b79de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e024b-402b-72e9-a9cb-a80860f30e9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e024b-402b-72e9-a9cb-a80860f30e9e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e024b-402b-7723-ad37-e02f6d02a43b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_019e024b-402b-7723-ad37-e02f6d02a43b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e024b-402b-7982-a8a0-c5a2baaf7067" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_019e024b-402b-7982-a8a0-c5a2baaf7067" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e024b-402b-712b-b195-91abc4ee2767" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_019e024b-402b-712b-b195-91abc4ee2767" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e024b-402b-76e7-95f7-79deea049907" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019e024b-402b-76e7-95f7-79deea049907" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e024b-402b-7bd1-9424-7ea2014e97c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019e024b-402b-7bd1-9424-7ea2014e97c2" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_019e024b-402b-7ed4-8816-c335ca5e205e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_019e024b-402b-7ed4-8816-c335ca5e205e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_019e024b-402b-7045-903b-1edf0d220026" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchasedDuringPeriodValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_019e024b-402b-7045-903b-1edf0d220026" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019ef320-1dd4-79d9-adbd-6c18aa85142b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019e024b-402b-74f3-b1f9-70d1e2d9ba3a" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019ef320-1dd4-79d9-adbd-6c18aa85142b" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019e024b-402b-7425-b5dc-d34e7a811513" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-724b-819e-c963fca604b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/RevenueRecognitionScheduleofRevenueDisaggregatedbyGeographicalAreaDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#RevenueRecognitionScheduleofRevenueDisaggregatedbyGeographicalAreaDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/RevenueRecognitionScheduleofRevenueDisaggregatedbyGeographicalAreaDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-7d51-92ec-e45270a873d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-756a-8bf2-38036ebc39bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-7d51-92ec-e45270a873d2" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-756a-8bf2-38036ebc39bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_019e024b-402b-793b-a535-de61433f2643" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-756a-8bf2-38036ebc39bd" xlink:to="loc_srt_StatementGeographicalAxis_019e024b-402b-793b-a535-de61433f2643" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e024b-402b-793b-a535-de61433f2643_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_019e024b-402b-793b-a535-de61433f2643" xlink:to="loc_srt_SegmentGeographicalDomain_019e024b-402b-793b-a535-de61433f2643_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_019e024b-402b-793b-a535-de61433f2643" xlink:to="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GB_019e024b-402b-76a0-ab78-4e5c7efc637e" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_GB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_GB_019e024b-402b-76a0-ab78-4e5c7efc637e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019e024b-402b-7cff-a8aa-82bad5a73b1b" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_US_019e024b-402b-7cff-a8aa-82bad5a73b1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NL_019e024b-402b-781b-a081-78b55664827e" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_NL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_NL_019e024b-402b-781b-a081-78b55664827e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_FR_019e024b-402b-786b-890f-bac766f6f4c2" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_FR"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_FR_019e024b-402b-786b-890f-bac766f6f4c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_ES_019e024b-402b-7619-b587-212361838128" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_ES"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_ES_019e024b-402b-7619-b587-212361838128" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_IT_019e024b-402b-7fbe-8acc-fac49036fffb" xlink:href="https://xbrl.sec.gov/country/2026/country-2026.xsd#country_IT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_country_IT_019e024b-402b-7fbe-8acc-fac49036fffb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_OtherGeographicalAreasMember_019e024b-402b-7a74-9854-d3718e4be1b3" xlink:href="gxo-20260630.xsd#gxo_OtherGeographicalAreasMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_019e024b-402b-766b-bf9c-0a3ea997003f" xlink:to="loc_gxo_OtherGeographicalAreasMember_019e024b-402b-7a74-9854-d3718e4be1b3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-7e05-be67-6989c9855adc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-7d51-92ec-e45270a873d2" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-7e05-be67-6989c9855adc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/RevenueRecognitionScheduleofRevenueDisaggregatedbyIndustrySectorDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#RevenueRecognitionScheduleofRevenueDisaggregatedbyIndustrySectorDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/RevenueRecognitionScheduleofRevenueDisaggregatedbyIndustrySectorDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-75fa-8a71-97dc6b396f1d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-7f95-a027-941b853936d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-75fa-8a71-97dc6b396f1d" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-7f95-a027-941b853936d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019e024b-402b-70a8-9832-814bd2a42909" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_019e024b-402b-7f95-a027-941b853936d8" xlink:to="loc_srt_ProductOrServiceAxis_019e024b-402b-70a8-9832-814bd2a42909" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e024b-402b-70a8-9832-814bd2a42909_default" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019e024b-402b-70a8-9832-814bd2a42909" xlink:to="loc_srt_ProductsAndServicesDomain_019e024b-402b-70a8-9832-814bd2a42909_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019e024b-402b-70a8-9832-814bd2a42909" xlink:to="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_ECommerceOmnichannelAndConsumerTechnologyMember_019e024b-402b-7c99-994f-a19895ee43f5" xlink:href="gxo-20260630.xsd#gxo_ECommerceOmnichannelAndConsumerTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_gxo_ECommerceOmnichannelAndConsumerTechnologyMember_019e024b-402b-7c99-994f-a19895ee43f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_TechnologyAndConsumerElectronicsMember_019e024b-402b-7683-af46-9abc2722f9d4" xlink:href="gxo-20260630.xsd#gxo_TechnologyAndConsumerElectronicsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_gxo_TechnologyAndConsumerElectronicsMember_019e024b-402b-7683-af46-9abc2722f9d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_IndustrialAndManufacturingMember_019e024b-402b-76fd-8019-75454579070b" xlink:href="gxo-20260630.xsd#gxo_IndustrialAndManufacturingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_gxo_IndustrialAndManufacturingMember_019e024b-402b-76fd-8019-75454579070b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_ConsumerPackagedGoodsMember_019e024b-402b-7727-ad76-27698ebb51e9" xlink:href="gxo-20260630.xsd#gxo_ConsumerPackagedGoodsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_gxo_ConsumerPackagedGoodsMember_019e024b-402b-7727-ad76-27698ebb51e9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FoodAndBeverageMember_019e024b-402b-7e0a-bf46-378e078d57a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FoodAndBeverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_us-gaap_FoodAndBeverageMember_019e024b-402b-7e0a-bf46-378e078d57a8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_019e024b-402b-7980-98c6-5e751a82abe5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019e024b-402b-7cf2-b86e-b1db28e0b790" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_019e024b-402b-7980-98c6-5e751a82abe5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-78ec-8cde-2d7146b4261d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_019e024b-402b-75fa-8a71-97dc6b396f1d" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-78ec-8cde-2d7146b4261d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/SegmentReportingScheduleofOperatingSegmentInformationDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#SegmentReportingScheduleofOperatingSegmentInformationDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/SegmentReportingScheduleofOperatingSegmentInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e024b-402b-7680-bbc1-10a095858beb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e024b-402b-7680-bbc1-10a095858beb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019e024b-402b-79f4-b939-998c5551de2a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019e024b-402b-7680-bbc1-10a095858beb" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019e024b-402b-79f4-b939-998c5551de2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e024b-402b-79f4-b939-998c5551de2a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e024b-402b-79f4-b939-998c5551de2a" xlink:to="loc_us-gaap_SegmentDomain_019e024b-402b-79f4-b939-998c5551de2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019e024b-402b-76a8-8c3a-abea57b7ed39" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019e024b-402b-79f4-b939-998c5551de2a" xlink:to="loc_us-gaap_SegmentDomain_019e024b-402b-76a8-8c3a-abea57b7ed39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_ReportableSegmentMember_019e024b-402b-7d64-bded-6f4ca517fe9d" xlink:href="gxo-20260630.xsd#gxo_ReportableSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019e024b-402b-76a8-8c3a-abea57b7ed39" xlink:to="loc_gxo_ReportableSegmentMember_019e024b-402b-7d64-bded-6f4ca517fe9d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-7daf-8d83-3426af87627c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019e024b-402b-7daf-8d83-3426af87627c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectOperatingCosts_019e024b-402b-76ca-8f16-cccdbe105c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DirectOperatingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_DirectOperatingCosts_019e024b-402b-76ca-8f16-cccdbe105c1b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_SellingGeneralAndAdministrativeExpenseAdjusted_019e024b-402b-77c9-8449-cfcd3a6ca495" xlink:href="gxo-20260630.xsd#gxo_SellingGeneralAndAdministrativeExpenseAdjusted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_gxo_SellingGeneralAndAdministrativeExpenseAdjusted_019e024b-402b-77c9-8449-cfcd3a6ca495" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019e024b-402b-758e-9442-d29ac6b8a66e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019e024b-402b-758e-9442-d29ac6b8a66e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_019e024b-402b-700e-a66b-4d0c7c075899" xlink:href="gxo-20260630.xsd#gxo_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_gxo_AdjustedEarningsBeforeInterestTaxesDepreciationAndAmortization_019e024b-402b-700e-a66b-4d0c7c075899" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_CorporateExpenses_019e024b-402b-729e-8aed-a719c558f50e" xlink:href="gxo-20260630.xsd#gxo_CorporateExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_gxo_CorporateExpenses_019e024b-402b-729e-8aed-a719c558f50e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_019e024b-402b-73c3-a788-02900fe804b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_Depreciation_019e024b-402b-73c3-a788-02900fe804b4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentForAmortization_019e024b-402b-7294-af58-547325e4728d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdjustmentForAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_AdjustmentForAmortization_019e024b-402b-7294-af58-547325e4728d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_SpinoffTransactionAndIntegrationCosts_019e024b-402b-7d53-82bb-144fa1613d41" xlink:href="gxo-20260630.xsd#gxo_SpinoffTransactionAndIntegrationCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_gxo_SpinoffTransactionAndIntegrationCosts_019e024b-402b-7d53-82bb-144fa1613d41" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019e024b-402b-73ae-ba64-03f56e490e96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_RestructuringCharges_019e024b-402b-73ae-ba64-03f56e490e96" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LegalFees_019e024b-402b-7858-8afd-c21faabf63ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LegalFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_LegalFees_019e024b-402b-7858-8afd-c21faabf63ef" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_019e024b-402b-77cd-8230-12d5a6d727c7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_019e024b-402b-77cd-8230-12d5a6d727c7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019e024b-402b-7ca3-a8f6-5d55194ec6bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_019e024b-402b-7ca3-a8f6-5d55194ec6bc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_019e024b-402b-7861-98a5-d7f413046c65" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_InterestExpenseNonoperating_019e024b-402b-7861-98a5-d7f413046c65" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e024b-402b-7567-ae61-3ce10f779dac" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019e024b-402b-7567-ae61-3ce10f779dac" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019e024b-402b-74c1-9f1f-1385803c111c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019e024b-402b-74c1-9f1f-1385803c111c" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019e024b-402b-7df9-89c9-33a4891cc0b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019e024b-402b-7d89-83cc-3ea9ba711693" xlink:to="loc_us-gaap_ProfitLoss_019e024b-402b-7df9-89c9-33a4891cc0b2" xlink:type="arc" order="16"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/IntangibleAssetsScheduleofFiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#IntangibleAssetsScheduleofFiniteLivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/IntangibleAssetsScheduleofFiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e024b-402b-7df7-8b68-eed9b5b284de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e024b-402b-7050-b948-3baf8004f429" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e024b-402b-7df7-8b68-eed9b5b284de" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e024b-402b-7050-b948-3baf8004f429" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e024b-402b-7b9d-9c49-a8dffc98082f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019e024b-402b-7050-b948-3baf8004f429" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e024b-402b-7b9d-9c49-a8dffc98082f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-7b9d-9c49-a8dffc98082f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e024b-402b-7b9d-9c49-a8dffc98082f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-7b9d-9c49-a8dffc98082f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-738b-ac40-91658634c59a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019e024b-402b-7b9d-9c49-a8dffc98082f" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-738b-ac40-91658634c59a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019e024b-402b-7be8-ba83-44c2f40f53d3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-738b-ac40-91658634c59a" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019e024b-402b-7be8-ba83-44c2f40f53d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_019e024b-402b-759c-a7d0-3ac40781e9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-738b-ac40-91658634c59a" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_019e024b-402b-759c-a7d0-3ac40781e9b5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_019e024b-402b-7a03-8f54-3a2f15aa487b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019e024b-402b-738b-ac40-91658634c59a" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_019e024b-402b-7a03-8f54-3a2f15aa487b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e024b-402b-792f-ad53-5c686c5015f3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e024b-402b-7df7-8b68-eed9b5b284de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019e024b-402b-792f-ad53-5c686c5015f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e024b-402b-7fcc-91c1-610b3298f80c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e024b-402b-7df7-8b68-eed9b5b284de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019e024b-402b-7fcc-91c1-610b3298f80c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e024b-402b-7298-83ae-a18f9ef496e9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019e024b-402b-7df7-8b68-eed9b5b284de" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019e024b-402b-7298-83ae-a18f9ef496e9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/DebtandFinancingArrangementsScheduleofDebtDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#DebtandFinancingArrangementsScheduleofDebtDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/DebtandFinancingArrangementsScheduleofDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-79c1-87e3-8a69454aea14" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-79c1-87e3-8a69454aea14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-79c1-87e3-8a69454aea14_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-79c1-87e3-8a69454aea14" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-79c1-87e3-8a69454aea14_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7440-8c50-82b4fa4bcbea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-79c1-87e3-8a69454aea14" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7440-8c50-82b4fa4bcbea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-7c73-87d7-8580eaaf8b2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7440-8c50-82b4fa4bcbea" xlink:to="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-7c73-87d7-8580eaaf8b2f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-70d2-89c0-02a9733d2972" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-70d2-89c0-02a9733d2972" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-70d2-89c0-02a9733d2972_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-70d2-89c0-02a9733d2972" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-70d2-89c0-02a9733d2972_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-70d2-89c0-02a9733d2972" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2026Member_019e024b-402b-7ce2-8d5a-245eb58a50b7" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_UnsecuredNotesDue2026Member_019e024b-402b-7ce2-8d5a-245eb58a50b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2029Member_019e024b-402b-7a36-bfe0-899877703b32" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_UnsecuredNotesDue2029Member_019e024b-402b-7a36-bfe0-899877703b32" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2031Member_019e024b-402b-7e12-a393-c5a61b0c5715" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_UnsecuredNotesDue2031Member_019e024b-402b-7e12-a393-c5a61b0c5715" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2034Member_019e024b-402b-7d29-8b74-aedc1db31c2a" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_UnsecuredNotesDue2034Member_019e024b-402b-7d29-8b74-aedc1db31c2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_EURUnsecuredNotesDue2030Member_019e024b-402b-7ee8-9839-e40c89d2f96d" xlink:href="gxo-20260630.xsd#gxo_EURUnsecuredNotesDue2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_EURUnsecuredNotesDue2030Member_019e024b-402b-7ee8-9839-e40c89d2f96d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_FiveYearTermLoanMember_019e024b-402b-70ad-91a7-05193c3d1d87" xlink:href="gxo-20260630.xsd#gxo_FiveYearTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_FiveYearTermLoanMember_019e024b-402b-70ad-91a7-05193c3d1d87" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_FinanceLeasesAndOtherMember_019e024b-402b-7e90-9cff-62e5e6a9e850" xlink:href="gxo-20260630.xsd#gxo_FinanceLeasesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-77bc-b5e8-7656d46f1c2f" xlink:to="loc_gxo_FinanceLeasesAndOtherMember_019e024b-402b-7e90-9cff-62e5e6a9e850" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7cd4-b1d2-729472318de2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7cd4-b1d2-729472318de2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7cd4-b1d2-729472318de2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7cd4-b1d2-729472318de2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7cd4-b1d2-729472318de2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-777c-94d4-418d0069818c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7cd4-b1d2-729472318de2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-777c-94d4-418d0069818c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e024b-402b-77ee-b4cd-ce0124ac0cb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-777c-94d4-418d0069818c" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e024b-402b-77ee-b4cd-ce0124ac0cb3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-7204-8ffb-104618bc9992" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-71cc-b358-7501db1af895" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-7204-8ffb-104618bc9992" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-7204-8ffb-104618bc9992_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-7204-8ffb-104618bc9992" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-7204-8ffb-104618bc9992_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7eb2-9268-ba3a4943af90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-7204-8ffb-104618bc9992" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7eb2-9268-ba3a4943af90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-775c-abc0-163ba24cddc0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7eb2-9268-ba3a4943af90" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-775c-abc0-163ba24cddc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e024b-402b-704f-9600-5ab58545e0ed" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-775c-abc0-163ba24cddc0" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e024b-402b-704f-9600-5ab58545e0ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e024b-402b-77bb-97b4-05b62eaaf99c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019e024b-402b-77bb-97b4-05b62eaaf99c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019e024b-402b-7237-90e9-cae99c570e50" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019e024b-402b-7237-90e9-cae99c570e50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-76dd-851a-13a5a5cb8098" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-76dd-851a-13a5a5cb8098" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e024b-402b-7763-a90e-b1e52e46ede5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e024b-402b-7763-a90e-b1e52e46ede5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019e024b-402b-7113-b135-69bee5763df9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019e024b-402b-7113-b135-69bee5763df9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019e024b-402b-7697-afd3-a608ed58932b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_019e024b-402b-7697-afd3-a608ed58932b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019e024b-402b-70cd-a61c-c4dbb2f74f24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019e024b-402b-70cd-a61c-c4dbb2f74f24" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e024b-402b-7373-8e10-45d86be41d77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7f3f-9910-233532160001" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019e024b-402b-7373-8e10-45d86be41d77" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/DebtandFinancingArrangementsNarrativeDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#DebtandFinancingArrangementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/DebtandFinancingArrangementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-770c-b620-a23d7caaa409" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-770c-b620-a23d7caaa409" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-770c-b620-a23d7caaa409_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-770c-b620-a23d7caaa409" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-770c-b620-a23d7caaa409_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7881-8336-112f48b96d97" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-770c-b620-a23d7caaa409" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7881-8336-112f48b96d97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019f8e60-f6fc-77b8-bbf0-7e33fc74d371" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7881-8336-112f48b96d97" xlink:to="loc_us-gaap_UnsecuredDebtMember_019f8e60-f6fc-77b8-bbf0-7e33fc74d371" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019e024b-402b-7972-b4d4-099018353cd0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-7881-8336-112f48b96d97" xlink:to="loc_us-gaap_LineOfCreditMember_019e024b-402b-7972-b4d4-099018353cd0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b86-b549-4c5a11ff8fb3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b86-b549-4c5a11ff8fb3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7b86-b549-4c5a11ff8fb3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b86-b549-4c5a11ff8fb3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7b86-b549-4c5a11ff8fb3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-771d-bab5-b77ed2aa1644" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b86-b549-4c5a11ff8fb3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-771d-bab5-b77ed2aa1644" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2026Member_019f8e60-f6fc-7ce5-b8bf-097636b634db" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-771d-bab5-b77ed2aa1644" xlink:to="loc_gxo_UnsecuredNotesDue2026Member_019f8e60-f6fc-7ce5-b8bf-097636b634db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e024b-402b-7f1d-ba70-99402f1efd4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-771d-bab5-b77ed2aa1644" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e024b-402b-7f1d-ba70-99402f1efd4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019e024b-402b-7f71-a771-287a037bf299" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:to="loc_us-gaap_CreditFacilityAxis_019e024b-402b-7f71-a771-287a037bf299" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7f71-a771-287a037bf299_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019e024b-402b-7f71-a771-287a037bf299" xlink:to="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7f71-a771-287a037bf299_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7cfc-85ba-641c7ed0c3b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019e024b-402b-7f71-a771-287a037bf299" xlink:to="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7cfc-85ba-641c7ed0c3b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-757d-ac65-d692e7c16102" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7cfc-85ba-641c7ed0c3b6" xlink:to="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-757d-ac65-d692e7c16102" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019e024b-402b-7c41-97ff-80de3354ff7e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7cfc-85ba-641c7ed0c3b6" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019e024b-402b-7c41-97ff-80de3354ff7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019e024b-402b-707f-a0a1-25cb449bbfbd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019e024b-402b-7cfc-85ba-641c7ed0c3b6" xlink:to="loc_us-gaap_LetterOfCreditMember_019e024b-402b-707f-a0a1-25cb449bbfbd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019fc8b2-a4a3-7135-a8ec-13cb7055c553" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019e024b-402b-7b60-96f7-96d5d87a7300" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019fc8b2-a4a3-7135-a8ec-13cb7055c553" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fc8b2-a4a3-7135-a8ec-13cb7055c553_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fc8b2-a4a3-7135-a8ec-13cb7055c553" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fc8b2-a4a3-7135-a8ec-13cb7055c553_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fc8b2-a4a3-7410-8d34-4b6d8b1d761e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fc8b2-a4a3-7135-a8ec-13cb7055c553" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fc8b2-a4a3-7410-8d34-4b6d8b1d761e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019fc8b2-a4a3-7c80-a1c4-6e85a5edbeb6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019fc8b2-a4a3-7410-8d34-4b6d8b1d761e" xlink:to="loc_us-gaap_SubsequentEventMember_019fc8b2-a4a3-7c80-a1c4-6e85a5edbeb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_019fc8b2-a4a3-763c-b056-89276ce57514" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_RepaymentsOfDebt_019fc8b2-a4a3-763c-b056-89276ce57514" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-71d5-8cd7-09b59bf5dc26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-71d5-8cd7-09b59bf5dc26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e024b-402b-7b63-b20a-5c657950a856" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019e024b-402b-7b63-b20a-5c657950a856" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019e024b-402b-71de-8730-1ae99be5b10b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_LineOfCredit_019e024b-402b-71de-8730-1ae99be5b10b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_019e024b-402b-796e-a2b4-2313f717b4bc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LettersOfCreditOutstandingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019e024b-402b-7a97-8994-ee51ff735a63" xlink:to="loc_us-gaap_LettersOfCreditOutstandingAmount_019e024b-402b-796e-a2b4-2313f717b4bc" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofDebtFairValuesDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#FairValueMeasurementsandFinancialInstrumentsScheduleofDebtFairValuesDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofDebtFairValuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e024b-402b-7d68-9409-695b7ecfc6c2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e024b-402b-7d68-9409-695b7ecfc6c2" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-72a3-b748-0ca0ed780376" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-72a3-b748-0ca0ed780376" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-72a3-b748-0ca0ed780376_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-72a3-b748-0ca0ed780376" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-72a3-b748-0ca0ed780376_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7aff-89b5-215f24384e8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019e024b-402b-72a3-b748-0ca0ed780376" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7aff-89b5-215f24384e8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-73aa-b60b-2d593597c416" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019e024b-402b-7aff-89b5-215f24384e8a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-73aa-b60b-2d593597c416" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e024b-402b-7971-840a-b50d1cc8a30e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-73aa-b60b-2d593597c416" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019e024b-402b-7971-840a-b50d1cc8a30e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e024b-402b-737c-af39-e5ca98201066" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019e024b-402b-73aa-b60b-2d593597c416" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019e024b-402b-737c-af39-e5ca98201066" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-71e1-9fc8-c65e64108b73" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-71e1-9fc8-c65e64108b73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-71e1-9fc8-c65e64108b73_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-71e1-9fc8-c65e64108b73" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-71e1-9fc8-c65e64108b73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-75e7-9c00-20616d53ce5f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019e024b-402b-71e1-9fc8-c65e64108b73" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-75e7-9c00-20616d53ce5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-7a86-a871-c07526a5fad7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019e024b-402b-75e7-9c00-20616d53ce5f" xlink:to="loc_us-gaap_UnsecuredDebtMember_019e024b-402b-7a86-a871-c07526a5fad7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b3c-a232-ef3478464469" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:to="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b3c-a232-ef3478464469" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7b3c-a232-ef3478464469_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b3c-a232-ef3478464469" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7b3c-a232-ef3478464469_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019e024b-402b-7b3c-a232-ef3478464469" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2026Member_019e024b-402b-709b-8aba-d5593ba914dc" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_UnsecuredNotesDue2026Member_019e024b-402b-709b-8aba-d5593ba914dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2029Member_019e024b-402b-72e2-a54e-04a4c7d8a36f" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_UnsecuredNotesDue2029Member_019e024b-402b-72e2-a54e-04a4c7d8a36f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2031Member_019e024b-402b-790a-995d-c98d31a4ce65" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_UnsecuredNotesDue2031Member_019e024b-402b-790a-995d-c98d31a4ce65" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_UnsecuredNotesDue2034Member_019e024b-402b-7843-84d0-8b866663a550" xlink:href="gxo-20260630.xsd#gxo_UnsecuredNotesDue2034Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_UnsecuredNotesDue2034Member_019e024b-402b-7843-84d0-8b866663a550" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_ThreeYearTermLoanMember_019e024b-402b-7ac4-8cec-1d44fbb621f5" xlink:href="gxo-20260630.xsd#gxo_ThreeYearTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_ThreeYearTermLoanMember_019e024b-402b-7ac4-8cec-1d44fbb621f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_FiveYearTermLoanMember_019e024b-402b-78f4-bdf3-93e0a052ab1b" xlink:href="gxo-20260630.xsd#gxo_FiveYearTermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019e024b-402b-7fa3-b700-06f728b02a96" xlink:to="loc_gxo_FiveYearTermLoanMember_019e024b-402b-78f4-bdf3-93e0a052ab1b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7683-9b24-261c3bca32a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_019e024b-402b-75d6-ae55-910682094643" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7683-9b24-261c3bca32a7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7683-9b24-261c3bca32a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7683-9b24-261c3bca32a7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7683-9b24-261c3bca32a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7db0-99ae-4ba7adcab9de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_019e024b-402b-7683-9b24-261c3bca32a7" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7db0-99ae-4ba7adcab9de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_019e024b-402b-7c0a-8ea1-977aee3c297c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_019e024b-402b-7db0-99ae-4ba7adcab9de" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_019e024b-402b-7c0a-8ea1-977aee3c297c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_019e024b-402b-7adc-9032-fca2577cdcd5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e024b-402b-7d68-9409-695b7ecfc6c2" xlink:to="loc_us-gaap_LongTermDebtFairValue_019e024b-402b-7adc-9032-fca2577cdcd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-72ac-a33f-28e2511256b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_019e024b-402b-7d68-9409-695b7ecfc6c2" xlink:to="loc_us-gaap_DebtInstrumentTerm_019e024b-402b-72ac-a33f-28e2511256b6" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e024b-402b-7970-9445-318ca6f2cb3a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementOfFinancialPositionLocationBalanceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_StatementOfFinancialPositionLocationBalanceAxis_019e024b-402b-7970-9445-318ca6f2cb3a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-74ea-b495-de1aa6e97250_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-74ea-b495-de1aa6e97250_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e024b-402b-7a28-a65a-ed4d6bf50aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e024b-402b-7a28-a65a-ed4d6bf50aeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e024b-402b-7b89-9e40-dbf3c8f4966c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:to="loc_us-gaap_NondesignatedMember_019e024b-402b-7b89-9e40-dbf3c8f4966c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7c9b-8c2f-a731664a3b6e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7c9b-8c2f-a731664a3b6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_019e024b-402b-7d35-b6dd-7e77a5774c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_019e024b-402b-7d35-b6dd-7e77a5774c1f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeOptionMember_019e024b-402b-7899-8e16-e742eadbc88b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_ForeignExchangeOptionMember_019e024b-402b-7899-8e16-e742eadbc88b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019e024b-402b-742b-a644-fcf908f7a3b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019e024b-402b-742b-a644-fcf908f7a3b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-76cf-a921-5ba382977e02_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-76cf-a921-5ba382977e02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-736f-81f1-8a484d135452" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-736f-81f1-8a484d135452" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_019e024b-402b-7494-88fe-d190c941f03f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:to="loc_us-gaap_FairValueHedgingMember_019e024b-402b-7494-88fe-d190c941f03f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e024b-402b-775a-a7b5-d34e268e9818" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e024b-402b-775a-a7b5-d34e268e9818" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e024b-402b-704e-a351-0740e61ce1ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e024b-402b-704e-a351-0740e61ce1ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e024b-402b-7b74-8ebb-53524252c22d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e024b-402b-7b74-8ebb-53524252c22d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails_1" xlink:type="simple" xlink:href="gxo-20260630.xsd#FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails_1"/>
  <link:definitionLink xlink:role="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofFairValuebyBalanceSheetLocationDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-74ea-b495-de1aa6e97250_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-74ea-b495-de1aa6e97250_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-74ea-b495-de1aa6e97250" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e024b-402b-7a28-a65a-ed4d6bf50aeb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DesignatedAsHedgingInstrumentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_019e024b-402b-7a28-a65a-ed4d6bf50aeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e024b-402b-7b89-9e40-dbf3c8f4966c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-70ad-b64e-13caae753828" xlink:to="loc_us-gaap_NondesignatedMember_019e024b-402b-7b89-9e40-dbf3c8f4966c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7c9b-8c2f-a731664a3b6e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7c9b-8c2f-a731664a3b6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-7c9b-8c2f-a731664a3b6e" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_019e024b-402b-7d35-b6dd-7e77a5774c1f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_019e024b-402b-7d35-b6dd-7e77a5774c1f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeOptionMember_019e024b-402b-7899-8e16-e742eadbc88b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_ForeignExchangeOptionMember_019e024b-402b-7899-8e16-e742eadbc88b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019e024b-402b-742b-a644-fcf908f7a3b2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-7843-81af-eab640cdc9bf" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019e024b-402b-742b-a644-fcf908f7a3b2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_019e024b-402b-79a8-907b-c508aeaddbcb" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-76cf-a921-5ba382977e02_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-76cf-a921-5ba382977e02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-76cf-a921-5ba382977e02" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-736f-81f1-8a484d135452" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-736f-81f1-8a484d135452" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_019e024b-402b-7494-88fe-d190c941f03f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-72a0-a523-cff102e16143" xlink:to="loc_us-gaap_FairValueHedgingMember_019e024b-402b-7494-88fe-d190c941f03f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019e024b-402b-775a-a7b5-d34e268e9818" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019e024b-402b-775a-a7b5-d34e268e9818" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e024b-402b-704e-a351-0740e61ce1ce" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_019e024b-402b-704e-a351-0740e61ce1ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e024b-402b-7b74-8ebb-53524252c22d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_019e024b-402b-7458-a300-bab688d59120" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_019e024b-402b-7b74-8ebb-53524252c22d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofDerivativeandNonderivativeInstrumentsDesignatedasHedgesDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#FairValueMeasurementsandFinancialInstrumentsScheduleofDerivativeandNonderivativeInstrumentsDesignatedasHedgesDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/FairValueMeasurementsandFinancialInstrumentsScheduleofDerivativeandNonderivativeInstrumentsDesignatedasHedgesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e024b-402b-7253-9785-663c96ff6f05" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e024b-402b-7253-9785-663c96ff6f05" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-74f6-9469-b68f69007526" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e024b-402b-7253-9785-663c96ff6f05" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-74f6-9469-b68f69007526" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-74f6-9469-b68f69007526_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-74f6-9469-b68f69007526" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-74f6-9469-b68f69007526_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-764e-adfc-e3bdfdf34d31" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019e024b-402b-74f6-9469-b68f69007526" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-764e-adfc-e3bdfdf34d31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_019e024b-402b-7b12-8c9e-dc51e1dbf799" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrencySwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-764e-adfc-e3bdfdf34d31" xlink:to="loc_us-gaap_CurrencySwapMember_019e024b-402b-7b12-8c9e-dc51e1dbf799" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019e024b-402b-7234-ad7c-7720a1cdda4c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-764e-adfc-e3bdfdf34d31" xlink:to="loc_us-gaap_InterestRateSwapMember_019e024b-402b-7234-ad7c-7720a1cdda4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_019e024b-402b-7fb0-8433-6904ed713ab5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019e024b-402b-764e-adfc-e3bdfdf34d31" xlink:to="loc_us-gaap_ForeignExchangeContractMember_019e024b-402b-7fb0-8433-6904ed713ab5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-7313-b621-38b2676e38d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e024b-402b-7253-9785-663c96ff6f05" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-7313-b621-38b2676e38d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7313-b621-38b2676e38d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-7313-b621-38b2676e38d2" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7313-b621-38b2676e38d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7dea-8613-c74199ad6142" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019e024b-402b-7313-b621-38b2676e38d2" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7dea-8613-c74199ad6142" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-7076-9fab-77c8c6b298bf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7dea-8613-c74199ad6142" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019e024b-402b-7076-9fab-77c8c6b298bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_019e024b-402b-79e3-baed-b4a590e77f72" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashFlowHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7dea-8613-c74199ad6142" xlink:to="loc_us-gaap_CashFlowHedgingMember_019e024b-402b-79e3-baed-b4a590e77f72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_019e024b-402b-776c-a618-cb9e0b7df1f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019e024b-402b-7dea-8613-c74199ad6142" xlink:to="loc_us-gaap_FairValueHedgingMember_019e024b-402b-776c-a618-cb9e0b7df1f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-721f-a792-9fbd72aebac9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_019e024b-402b-7253-9785-663c96ff6f05" xlink:to="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-721f-a792-9fbd72aebac9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-721f-a792-9fbd72aebac9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-721f-a792-9fbd72aebac9" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-721f-a792-9fbd72aebac9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-7a54-91a0-9c3451ab61c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_019e024b-402b-721f-a792-9fbd72aebac9" xlink:to="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-7a54-91a0-9c3451ab61c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_019e024b-402b-713a-a256-77bb10519550" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_019e024b-402b-7a54-91a0-9c3451ab61c0" xlink:to="loc_us-gaap_NondesignatedMember_019e024b-402b-713a-a256-77bb10519550" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_019e024b-402b-73a4-b320-0c1fb2a204e0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_019e024b-402b-73a4-b320-0c1fb2a204e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e024b-402b-7cf8-83e6-c81374c98056" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019e024b-402b-7cf8-83e6-c81374c98056" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax_019e024b-402b-7d7d-bb59-dc5a09861f90" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsAndTax_019e024b-402b-7d7d-bb59-dc5a09861f90" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e024b-402b-7be7-bf94-f8e7fe3170eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_019e024b-402b-73cd-be21-d86b107faf2e" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019e024b-402b-7be7-bf94-f8e7fe3170eb" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/DivestitureDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#DivestitureDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/DivestitureDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019e024b-402b-73f5-8922-aa857f1bfcca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019e024b-402b-73f5-8922-aa857f1bfcca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e024b-402b-73b2-bd75-3b98afd36414" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_019e024b-402b-73f5-8922-aa857f1bfcca" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e024b-402b-73b2-bd75-3b98afd36414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e024b-402b-73b2-bd75-3b98afd36414_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e024b-402b-73b2-bd75-3b98afd36414" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e024b-402b-73b2-bd75-3b98afd36414_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e024b-402b-7e15-a67f-69b766fe8c47" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_019e024b-402b-73b2-bd75-3b98afd36414" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e024b-402b-7e15-a67f-69b766fe8c47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_WincantonDivestmentMember_019e024b-402b-753d-b46a-e6698ab943b3" xlink:href="gxo-20260630.xsd#gxo_WincantonDivestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_019e024b-402b-7e15-a67f-69b766fe8c47" xlink:to="loc_gxo_WincantonDivestmentMember_019e024b-402b-753d-b46a-e6698ab943b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e024b-402b-7718-a23f-3860cb2f3832" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown_019e024b-402b-7718-a23f-3860cb2f3832" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019e024b-402b-7dd8-bd55-ee0136f6a50f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019e024b-402b-7dd8-bd55-ee0136f6a50f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_019e024b-402b-78ee-9f6f-61aa0737c113" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_019e024b-402b-78ee-9f6f-61aa0737c113" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_DisposalGroupIncludingDiscontinuedOperationFairValueAdjustment_019e024b-402b-7c26-8dd8-fc5efc8958b5" xlink:href="gxo-20260630.xsd#gxo_DisposalGroupIncludingDiscontinuedOperationFairValueAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_gxo_DisposalGroupIncludingDiscontinuedOperationFairValueAdjustment_019e024b-402b-7c26-8dd8-fc5efc8958b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_019ef808-6b27-7441-bedd-5d8b11342861" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainLossOnSaleOfBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_019e024b-402b-7f7e-9194-5d2d7736d42f" xlink:to="loc_us-gaap_GainLossOnSaleOfBusiness_019ef808-6b27-7441-bedd-5d8b11342861" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/EmployeeBenefitPlansScheduleofProjectedBenefitObligationsDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#EmployeeBenefitPlansScheduleofProjectedBenefitObligationsDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/EmployeeBenefitPlansScheduleofProjectedBenefitObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e024b-402b-7c28-884e-587d9fdff83d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e024b-402b-7c28-884e-587d9fdff83d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019e024b-402b-7b1b-b8f9-c4e62245d02e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019e024b-402b-7c28-884e-587d9fdff83d" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019e024b-402b-7b1b-b8f9-c4e62245d02e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e024b-402b-7b1b-b8f9-c4e62245d02e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e024b-402b-7b1b-b8f9-c4e62245d02e" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e024b-402b-7b1b-b8f9-c4e62245d02e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019e024b-402b-7fc0-9a66-27a733c21642" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019e024b-402b-7b1b-b8f9-c4e62245d02e" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019e024b-402b-7fc0-9a66-27a733c21642" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019e024b-402b-7ce5-a10c-89b328b506c9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019e024b-402b-7fc0-9a66-27a733c21642" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019e024b-402b-7ce5-a10c-89b328b506c9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019e024b-402b-72a2-9c3c-8dea1b984d8b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019e024b-402b-72a2-9c3c-8dea1b984d8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e024b-402b-754d-bdbe-de7d712130a9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019e024b-402b-754d-bdbe-de7d712130a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e024b-402b-7228-8f16-de4a113b8e8d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019e024b-402b-7228-8f16-de4a113b8e8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e024b-402b-7670-a970-374d2d539fde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019e024b-402b-78a4-b100-89738148abf0" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019e024b-402b-7670-a970-374d2d539fde" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/StockholdersEquityNarrativeDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#StockholdersEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/StockholdersEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019fcb41-ae52-7868-bae9-b9a83650e505" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019fcb41-ae52-7868-bae9-b9a83650e505" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019fcb41-ae52-782c-ac57-727556d323af" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019fcb41-ae52-7868-bae9-b9a83650e505" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019fcb41-ae52-782c-ac57-727556d323af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fcb41-ae52-782c-ac57-727556d323af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fcb41-ae52-782c-ac57-727556d323af" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fcb41-ae52-782c-ac57-727556d323af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019fcb41-ae52-7f2a-b5b3-4a2bd2d2181f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019fcb41-ae52-782c-ac57-727556d323af" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019fcb41-ae52-7f2a-b5b3-4a2bd2d2181f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019fcb41-ae52-7536-87d8-c8f3c4e79192" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019fcb41-ae52-7f2a-b5b3-4a2bd2d2181f" xlink:to="loc_us-gaap_SubsequentEventMember_019fcb41-ae52-7536-87d8-c8f3c4e79192" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e024b-402b-7e5e-b50e-69349568e3f9" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019e024b-402b-7e5e-b50e-69349568e3f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_019ef782-dbbd-7e69-8a93-460701c7a5b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_019ef782-dbbd-7e69-8a93-460701c7a5b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019fcb41-ae52-7b9a-a8bc-a9d5c2fcd212" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_019fcb41-ae52-7b9a-a8bc-a9d5c2fcd212" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019e024b-402b-7a30-8f9e-317995c70533" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019fcb41-ae52-7ba7-9ea7-d50adb1e0ef5" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019e024b-402b-7a30-8f9e-317995c70533" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://gxo.com/role/StockholdersEquityScheduleofAccumulatedOtherComprehensiveLossDetails" xlink:type="simple" xlink:href="gxo-20260630.xsd#StockholdersEquityScheduleofAccumulatedOtherComprehensiveLossDetails"/>
  <link:definitionLink xlink:role="http://gxo.com/role/StockholdersEquityScheduleofAccumulatedOtherComprehensiveLossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e024b-402b-794e-b3d3-a008e7c455bb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e024b-402b-78aa-b36f-b78cfbab31dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e024b-402b-794e-b3d3-a008e7c455bb" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e024b-402b-78aa-b36f-b78cfbab31dc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-7900-9174-9408178bf37d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019e024b-402b-78aa-b36f-b78cfbab31dc" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-7900-9174-9408178bf37d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e024b-402b-7900-9174-9408178bf37d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-7900-9174-9408178bf37d" xlink:to="loc_us-gaap_EquityComponentDomain_019e024b-402b-7900-9174-9408178bf37d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019e024b-402b-7900-9174-9408178bf37d" xlink:to="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_019e024b-402b-7764-8509-870aa1a8e65a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_019e024b-402b-7764-8509-870aa1a8e65a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_AccumulatedGainLossNetInvestmentHedgingIncludingNoncontrollingInterestMember_019e024b-402b-79a5-a284-bbcc175af16d" xlink:href="gxo-20260630.xsd#gxo_AccumulatedGainLossNetInvestmentHedgingIncludingNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_gxo_AccumulatedGainLossNetInvestmentHedgingIncludingNoncontrollingInterestMember_019e024b-402b-79a5-a284-bbcc175af16d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_019e024b-402b-7dfb-bca7-b66a90acaa2c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_us-gaap_AccumulatedGainLossCashFlowHedgeIncludingNoncontrollingInterestMember_019e024b-402b-7dfb-bca7-b66a90acaa2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_gxo_AccumulatedGainLossFairValueHedgesIncludingNoncontrollingInterestMember_019e024b-402b-7af4-bfad-a6cdd4d44a4d" xlink:href="gxo-20260630.xsd#gxo_AccumulatedGainLossFairValueHedgesIncludingNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_gxo_AccumulatedGainLossFairValueHedgesIncludingNoncontrollingInterestMember_019e024b-402b-7af4-bfad-a6cdd4d44a4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_019e024b-402b-745b-acb6-973dd5ce5d98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember_019e024b-402b-745b-acb6-973dd5ce5d98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociAttributableToNoncontrollingInterestMember_019e024b-402b-783f-b887-6f4aa41f2a23" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AociAttributableToNoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_us-gaap_AociAttributableToNoncontrollingInterestMember_019e024b-402b-783f-b887-6f4aa41f2a23" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e024b-402b-7de7-a258-f8be5bdac315" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019e024b-402b-7fdf-8081-8e05ba69ee4d" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019e024b-402b-7de7-a258-f8be5bdac315" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019e024b-402b-794e-b3d3-a008e7c455bb" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-72ac-bd3f-279efbe96f2f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-72ac-bd3f-279efbe96f2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_019e024b-402b-7c29-889f-2b5e74b5ffa8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax_019e024b-402b-7c29-889f-2b5e74b5ffa8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_019e024b-402b-78b7-a3ca-c98081cdebe4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax_019e024b-402b-78b7-a3ca-c98081cdebe4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e024b-402b-7a65-a70c-067f215a090b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_019e024b-402b-7a65-a70c-067f215a090b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e024b-402b-74c3-b933-bd2a05fc125c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019e024b-402b-71e7-95ba-403a467b177b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_019e024b-402b-74c3-b933-bd2a05fc125c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019e024b-402b-74b4-9c39-88a995e95a06" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/srt/2026/elts/srt-roles-2026.xsd#eedm1"/>
  <link:definitionLink xlink:role="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>
