/ Dictionary / Index K Key West: Meaning and Definition of Find definitions for: Key' West' Pronunciation: [key] an island off S Florida, in the Gulf of Mexico. 4 mi. (6.4 km) long; 2 mi. (3.2 km) wide. a seaport on this island: the southernmost city in the U.S.; naval base. 24,292. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. keyway keyword Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language