Aeschylus Syllabification: (Aes·chy·lus)Pronunciation: /ˈeskələs/Definition of Aeschylus (circa 525-circa 456 bc), Greek dramatist. He is best known for his trilogy, the Oresteia (458 bc), consisting of the tragedies Agamemnon, Choephoroe, and Eumenides. Aeschylus in other Oxford dictionaries Definition of Aeschylus in the British & World English dictionary