/ Dictionary / Index M MacMahon: Meaning and Definition of Find definitions for: Mac•Ma•hon Pronunciation: (mak-ma-ôn'), [key] — n. (Duke of Magenta),1808–93, president of France 1873–79. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Macleod MacManus Related Content Daily Word Quiz: inane Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language