Saint Martin saint·mar·tin uncommon noun 1. an island in the western Leeward Islands; administered jointly by France and the Netherlands SynonymsSaint MartinSt. MartinSaint MaartenSt. Maarten Related words Word family Saint Martin's summer Broader terms island Parts Leeward Islands WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.