/ Dictionary / Index M monial: Meaning and Definition of Find definitions for: mo•ni•al Pronunciation: (mō'nē-ul), [key] — n. Archaic. a mullion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mongu monic Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language