/ Dictionary / Index R riff: Meaning and Definition of Find definitions for: riff Pronunciation: (rif), [key] —n. a melodic phrase, often constantly repeated, forming an accompaniment or part of an accompaniment for a soloist. —v.i. to perform riffs. riff Pronunciation: (rif), [key] — v.t. Informal. rif. Riff Pronunciation: (rif), [key] — pl. Riffs, Riff•i Riff. a member of the Berber people living in Er Rif in northern Morocco. Rif. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: riff (Thesaurus) rife riffle Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language