/ Dictionary / Index M megacorporation: Meaning and Definition of Find definitions for: meg•a•cor•po•ra•tion Pronunciation: (meg'u-kôr"pu-rā"shun), [key] — n. a giant company formed from two or more large companies or a number of companies of various sizes. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. megacity megacycle 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