/ Dictionary / Index M moment: Meaning and Definition of Find definitions for: mo•ment Pronunciation: (mō'munt), [key] — n. an indefinitely short period of time; instant: I'll be with you in a moment. the present time or any other particular time (usually prec. by the): He is busy at the moment. a definite period or stage, as in a course of events; juncture: at this moment in history. importance or consequence: a decision of great moment. a particular time or period of success, excellence, fame, etc.: His big moment came in the final game. the mean or expected value of the product formed by multiplying together a set of one or more variates or variables each to a specified power. an aspect of a thing. Obs.an essential or constituent factor. moment of area; moment of mass. a tendency to produce motion, esp. about an axis. the product of a physical quantity and its directed distance from an axis:moment of area; moment of mass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: moment (Thesaurus) mome momentarily Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language