two groups of islands in the Caribbean, in the Lesser Antilles: a former constituent country of the Netherlands (since 2010 each island has had a separate status), consisting of the S group of Curaçao, Aruba, and Bonaire, and the N group of Saint Eustatius, Saba, and the S part of Saint Martin; economy based on refining oil from Venezuela. Pop: 222 000 (2004 est). Area: 996 sq km (390 sq miles)