/ Dictionary / Index M MUF: Meaning and Definition of Find definitions for: MUF Pronunciation: [key] material unaccounted for. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. muezzin muff Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language