/ Dictionary / Index O Oresteia*: Meaning and Definition of Find definitions for: O•res•te•ia Pronunciation: (ôr"e-stē'u, ōr"-), [key] — n. a trilogy of tragic dramas (458 b.c.) by Aeschylus, consisting of the Agamemnon, the Choëphori, and the Eumenides. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oreshoot Orestes Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language