/ Dictionary / Index A Atreus: Meaning and Definition of Find definitions for: A•tre•us Pronunciation: (ā'trē-us, ā'trys), [key] — n. Class. Myth. the father of Plisthenes, Agamemnon, Menelaus, and Anaxibia upon whose house Thyestes pronounced a curse. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: atreus (Thesaurus) atresia atrial natriuretic factor Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language