Customs plural a : obligations, tolls, or imposts imposed by the sovereign regulation of a country on imports or exports b generally singular in construction : the agency, establishment, or treatment for accumulating this sort of customs went through customs in the airport with none issue b : prolonged-proven practice https://www.ecom-group.com/training-events/sap-grc-sap-access-control-implementation-and-configuration-grc300/