/ Dictionary / Index O ou: Meaning and Definition of Find definitions for: o•u Pronunciation: (ō''), [key] — n. a rare Hawaiian honeycreeper, Psittirostra psittacea, having an olive-green body, a parrotlike bill, and in the male a bright yellow head. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Otway ouabain 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