/ Dictionary / Index G G clef: Meaning and Definition of Find definitions for: G clef Pronunciation: [key] — Music. Music. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. GCI G.C.M. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language