/ Dictionary / Index M mesa: Meaning and Definition of Find definitions for: me•sa Pronunciation: (mā'su), [key] — n. a land formation, less extensive than a plateau, having steep walls and a relatively flat top and common in arid and semiarid parts of the southwestern U.S. and Mexico. Me•sa Pronunciation: (mā'su), [key] — n. a city in central Arizona, near Phoenix. 152,453. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mesa (Thesaurus) mes- Mesabi Range Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language