St. Vin?cent (?v?n s?nt) n. 1. an island in the S Windward Islands, in the SE West Indies: part of the state of St. Vincent and the Grenadines. 133 sq. mi. (345 sq. km). 2. Cape, the SW tip of Portugal. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.