customerPronunciation: /ˈkʌstəmə/Translate customer | into French | into German | into Italian | into Spanish Definition of customer noun 1a person who buys goods or services from a shop or business:Mr Harrison was a regular customer at the Golden Lion 2 [with adjective] a person of a specified kind with whom one has to deal:he’s a tough customercustomer in other Oxford dictionaries Definition of customer in the US English dictionary