/ Dictionary / Index C chinbone: Meaning and Definition of Find definitions for: chin•bone Pronunciation: (chin'bōn"), [key] — n. the anterior portion of the mandible, forming the prominence of the chin. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chinbeak chin cactus Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language