/ Dictionary / Index M mmf: Meaning and Definition of Find definitions for: mmf Pronunciation: [key] magnetomotive force. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. M.Met.E. M.Mgt.E. Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language