/ Dictionary / Index A ao dai: Meaning and Definition of Find definitions for: ao dai Pronunciation: (ou' dī', ô' dī'), [key] — pl. ao dais. a costume composed of a long tunic with side slits over wide trousers, worn by Vietnamese women as traditional dress. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. AOA Aoede Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language