/ Dictionary / Index A Anticosti: Meaning and Definition of Find definitions for: An•ti•cos•ti Pronunciation: (an"tu-kô'stē, -kos'tē), [key] — n. an island at the head of the Gulf of St. Lawrence in E Canada, in E Quebec province. 494; 135 mi. (217 km) long; 3043 sq. mi. (7880 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. anticorrosive anticrepuscular arch Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language