/ Dictionary / Index M Ma'mun, al-: Meaning and Definition of Find definitions for: Ma'•mun al- Pronunciation: (al'mä-mn', -ma-), [key] — (abu-al-'Abbās 'Abdullāh) a.d.786–833, caliph of Baghdad 813–833 (son of Harun al-Rashid). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mamoré Mamurius Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language