SIBYL Meaning of SIBYL in English n.1 any of the women in ancient times supposed to utter the oracles and prophecies of a god. 2 a prophetess, fortune-teller, or witch. Etymology: ME f. OF Sibile or med.L Sibilla f. L Sibylla f. Gk Sibulla Oxford English vocab. Оксфордский английский словарь. 2012