/ Dictionary / Index C cosy: Meaning and Definition of Find definitions for: co•sy Pronunciation: (kō'zē), [key] — n., pl. v., -si•er, -si•est, -sies, -sied, -sy•ing. cozy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cosy (Thesaurus) cost unit Cosyra Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language