/ Dictionary / Index C coheir: Meaning and Definition of Find definitions for: co•heir Pronunciation: (kō-âr'), [key] — n. a joint heir. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Cohan coheiress Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language