/ Dictionary / Index C clef: Meaning and Definition of Find definitions for: clef Pronunciation: (klef), [key] — n. Music. a symbol placed upon a staff to indicate the name and pitch of the notes corresponding to its lines and spaces. Cf. bass clef, treble clef, C clef. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: clef (Thesaurus) cleek cleft Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language