/ Dictionary / Index K koa: Meaning and Definition of Find definitions for: ko•a Pronunciation: (kō'u), [key] — n. a Hawaiian acacia, Acacia koa, of the legume family, characterized by spreading branches and gray bark. the hard, red or golden-brown wood of this tree, used for making furniture. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. KO koala 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