Benelux Syllabification: (Ben·e·lux)Pronunciation: /ˈbenlˌəks/Translate Benelux | into Italian Definition of Benelux a collective name for Belgium, the Netherlands, and Luxembourg, especially with reference to their economic union. Origin: 1947: acronym from Belgium, Netherlands, and LuxembourgBenelux in other Oxford dictionaries Definition of Benelux in the British & World English dictionary