/ Dictionary / Index M megadeal: Meaning and Definition of Find definitions for: meg•a•deal Pronunciation: (meg'u-dēl"), [key] a large business transaction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megacycle megadeath 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