/ Dictionary / Index A Ainu: Meaning and Definition of Find definitions for: Ai•nu Pronunciation: (ī'n), [key] — pl. -nus, -nu. a member of an aboriginal population of northernmost Japan, having lighter skin and hairier bodies than other Japanese. the language of the Ainus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aintab aioli Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language