/ Dictionary / Index M midriff: Meaning and Definition of Find definitions for: mid•riff Pronunciation: (mid'rif), [key] — n. diaphragm (def. 1). the middle part of the body, between the chest and the waist. the part of a dress or bodice, usually close-fitting, that covers this part of the body. a garment that exposes this part of the body. —adj. noting or pertaining to the middle part of the human body, the part of a garment that covers it, or a garment that exposes it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: midriff (Thesaurus) midrib mid-rise Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language