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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:833287ac-a7ad-485a-bf81-33f1205c76e1,g:2c3b6498-219f-48c6-95d6-bf7fbffb818d-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.lyb.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="lyb-20200529.xsd#DocumentandEntityInformationDocument"/>
  <link:definitionLink xlink:role="http://www.lyb.com/role/DocumentandEntityInformationDocument" xlink:type="extended" id="i89283b5509af4119ae617f6e7d1f2cd7_DocumentandEntityInformationDocument">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_b86d11cd-0cf5-4e40-9776-96ef1c637ddc" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_DocumentType_b86d11cd-0cf5-4e40-9776-96ef1c637ddc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_156c980c-b5a9-43f0-b2ff-4fdc07737598" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_DocumentPeriodEndDate_156c980c-b5a9-43f0-b2ff-4fdc07737598" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_15f7b435-7bce-48bd-9286-e7b751afb129" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityRegistrantName_15f7b435-7bce-48bd-9286-e7b751afb129" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_4b8ba616-3f70-4e3d-9957-dd3c4078c4b1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityIncorporationStateCountryCode_4b8ba616-3f70-4e3d-9957-dd3c4078c4b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_c2c82519-1885-44ba-8794-94851197b83b" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityFileNumber_c2c82519-1885-44ba-8794-94851197b83b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_ecbb2a7f-97eb-48a3-a435-f6a7a76af271" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityTaxIdentificationNumber_ecbb2a7f-97eb-48a3-a435-f6a7a76af271" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_6e38090e-6e4f-4e9a-a8f6-6ff76464a9cc" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_WrittenCommunications_6e38090e-6e4f-4e9a-a8f6-6ff76464a9cc" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_aa135a2e-fc33-4e1c-b699-f9e5dcabff5c" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_SolicitingMaterial_aa135a2e-fc33-4e1c-b699-f9e5dcabff5c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_f46aa6c8-19b8-40d9-a038-c549bbc3fa70" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_PreCommencementTenderOffer_f46aa6c8-19b8-40d9-a038-c549bbc3fa70" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_2ab23617-48aa-422d-a941-0b38cb5adb97" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_2ab23617-48aa-422d-a941-0b38cb5adb97" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_0cb3b2dc-9553-4ba2-8bed-82049138caee" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_Security12bTitle_0cb3b2dc-9553-4ba2-8bed-82049138caee" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_47fcb903-68e2-4235-8996-8b7c490ae0ca" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_TradingSymbol_47fcb903-68e2-4235-8996-8b7c490ae0ca" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_684d85cc-5b69-4b39-aaa6-c53dff2082af" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_SecurityExchangeName_684d85cc-5b69-4b39-aaa6-c53dff2082af" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_a7f9a108-3843-4679-9ad9-f40870caa41f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityEmergingGrowthCompany_a7f9a108-3843-4679-9ad9-f40870caa41f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_9f503058-0284-49f6-993d-c1d6bc168519" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntityCentralIndexKey_9f503058-0284-49f6-993d-c1d6bc168519" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_a2667b01-25e9-4ef3-8287-c2a9055ef373" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_AmendmentFlag_a2667b01-25e9-4ef3-8287-c2a9055ef373" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_52d314e0-207b-4365-a0ed-3acdae683f14" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_b3a78899-0714-4ba3-ba5f-86c061a5df22" xlink:to="loc_dei_EntitiesTable_52d314e0-207b-4365-a0ed-3acdae683f14" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5ad5adcf-5093-4172-8095-e0d261a50f42" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_52d314e0-207b-4365-a0ed-3acdae683f14" xlink:to="loc_dei_LegalEntityAxis_5ad5adcf-5093-4172-8095-e0d261a50f42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5ad5adcf-5093-4172-8095-e0d261a50f42_default" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5ad5adcf-5093-4172-8095-e0d261a50f42" xlink:to="loc_dei_EntityDomain_5ad5adcf-5093-4172-8095-e0d261a50f42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_bfa05643-7988-401e-9040-c45870fdbbe1" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5ad5adcf-5093-4172-8095-e0d261a50f42" xlink:to="loc_dei_EntityDomain_bfa05643-7988-401e-9040-c45870fdbbe1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_ce923686-f756-4294-9d59-1f6199783a39" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressAddressLine1_ce923686-f756-4294-9d59-1f6199783a39" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_a7310559-3d58-49c4-b090-c8ab395178b6" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressAddressLine2_a7310559-3d58-49c4-b090-c8ab395178b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_97c8594a-aeb2-46b6-9105-56e7cdddc6c6" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressCityOrTown_97c8594a-aeb2-46b6-9105-56e7cdddc6c6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_68d480cc-eb5f-4b05-a191-499e17441f67" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressStateOrProvince_68d480cc-eb5f-4b05-a191-499e17441f67" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCountry_2e9eb501-7921-4556-9d15-a771c377d8bd" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCountry"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressCountry_2e9eb501-7921-4556-9d15-a771c377d8bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_9745ff3b-237b-415b-b8c6-49f29cd4da08" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressPostalZipCode_9745ff3b-237b-415b-b8c6-49f29cd4da08" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CountryRegion_5c5da546-99e9-464a-94eb-a82b7558306d" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CountryRegion"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_CountryRegion_5c5da546-99e9-464a-94eb-a82b7558306d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_20aee484-8310-4b98-a21b-f69f7a778af5" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_CityAreaCode_20aee484-8310-4b98-a21b-f69f7a778af5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_48631770-e2ed-4ce7-8115-1dcff1bd6f05" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_LocalPhoneNumber_48631770-e2ed-4ce7-8115-1dcff1bd6f05" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesTable_71d71b32-e63d-4b72-895b-517a66e5ee84" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityAddressesLineItems_2cd2ca21-e612-46b8-af1d-fdf635e7df17" xlink:to="loc_dei_EntityAddressesTable_71d71b32-e63d-4b72-895b-517a66e5ee84" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressesAddressTypeAxis_4e463741-029f-4e90-8a2b-3a4261d2850f" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressesAddressTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntityAddressesTable_71d71b32-e63d-4b72-895b-517a66e5ee84" xlink:to="loc_dei_EntityAddressesAddressTypeAxis_4e463741-029f-4e90-8a2b-3a4261d2850f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_4e463741-029f-4e90-8a2b-3a4261d2850f_default" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_4e463741-029f-4e90-8a2b-3a4261d2850f" xlink:to="loc_dei_AddressTypeDomain_4e463741-029f-4e90-8a2b-3a4261d2850f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AddressTypeDomain_d4b2b702-246f-4e3e-a193-68566d5cf9b6" xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AddressTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_EntityAddressesAddressTypeAxis_4e463741-029f-4e90-8a2b-3a4261d2850f" xlink:to="loc_dei_AddressTypeDomain_d4b2b702-246f-4e3e-a193-68566d5cf9b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_GB_67cd34d5-cad9-477f-b03d-0f0072d816fa" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_d4b2b702-246f-4e3e-a193-68566d5cf9b6" xlink:to="loc_country_GB_67cd34d5-cad9-477f-b03d-0f0072d816fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_NL_37023809-483c-460d-8bd2-8a994abb0bee" xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_NL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AddressTypeDomain_d4b2b702-246f-4e3e-a193-68566d5cf9b6" xlink:to="loc_country_NL_37023809-483c-460d-8bd2-8a994abb0bee" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
