/ Dictionary / Index C coscenarist: Meaning and Definition of Find definitions for: co•sce•nar•ist Pronunciation: (kō"si-nâr'ist, -när'-), [key] — n. one of two or more joint scenarists. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cosby cose Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language