/ Dictionary / Index A aoi: Meaning and Definition of Find definitions for: aoi Pronunciation: [key] angle of incidence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. AOH A-OK 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