/ Dictionary / Index C CMC: Meaning and Definition of Find definitions for: CMC Pronunciation: [key] certified management consultant. Commandant of the Marine Corps. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. CMA cmd. Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language