/ Dictionary / Index C Chief of Naval Operations: Meaning and Definition of Find definitions for: Chief' of Na'val Opera"tions Pronunciation: [key] the highest officer in the U.S. Navy and a member of the Joint Chiefs of Staff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. chief mate Chief of Staff Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language