a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
(in ancient Greece and Rome) any of a number of women believed to be oracles or prophetesses, one of the most famous being the sibyl of Cumae, who guided Aeneas through the underworld
2.
a witch, fortune-teller, or sorceress
[C13: ultimately from Greek Sibulla, of obscure origin]