/ Dictionary / Index O Oppenheim: Meaning and Definition of Find definitions for: Op•pen•heim Pronunciation: (op'un-hīm"), [key] 1866–1946, English novelist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Opp. Oppenheimer Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language