/ Dictionary / Index D defining moment: Meaning and Definition of Find definitions for: defin'ing mo'ment Pronunciation: [key] a point at which the essential nature or character of a person, group, etc., is revealed or identified. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. definiens definite Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language