/ Dictionary / Index M monnion: Meaning and Definition of Find definitions for: mon•ni•on Pronunciation: (mon'ē-un), [key] — n. Armor. spaulder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Monnet mono Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language