/ Dictionary / Index C CNO: Meaning and Definition of Find definitions for: CNO Pronunciation: [key] Chief of Naval Operations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. CNN Cnossus 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