/ Dictionary / Index M megavolt: Meaning and Definition of Find definitions for: meg•a•volt Pronunciation: (meg'u-vōlt"), [key] — n. Elect. a unit of electromotive force, equal to one million volts. Abbr.: MV Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megavitamin megawatt Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language