/ Dictionary / Index M momento: Meaning and Definition of Find definitions for: mo•men•to Pronunciation: (mu-men'tō, mō-), [key] — pl. -tos, -toes. memento. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. momently moment of inertia Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language