/ Dictionary / Index O OJ: Meaning and Definition of Find definitions for: OJ Pronunciation: [key] — Informal. Informal. orange juice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oiticica oil Ojibwa Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language