/ Dictionary / Index M meanwhile: Meaning and Definition of Find definitions for: mean•while Pronunciation: (mēn'hwīl", -wīl"), [key] — n. meantime. —adv. in the intervening time; during the interval. at the same time: Meanwhile, the others were back home enjoying themselves. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: meanwhile (Thesaurus) mean value theorem meany Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language