/ Dictionary / Index M moa: Meaning and Definition of Find definitions for: mo•a Pronunciation: (mō'u), [key] — n. any of several flightless birds of the family Dinornithidae, of New Zealand, related to the kiwis but resembling the ostrich: extinct since about the end of the 18th century. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: moa (Thesaurus) mo Moab Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language