/ Dictionary / Index C coign: Meaning and Definition of Find definitions for: coign Pronunciation: (koin), [key] — n., v.t. quoin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coign (Thesaurus) coiffurist coigne Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language