/ Dictionary / Index M main-de-fer: Meaning and Definition of Find definitions for: main-de-fer Pronunciation: (man'u-fer"), [key] — n. Armor. manifer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. main deck main diagonal Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language