a. [ L. sibyllinus. ] Pertaining to the sibyls; uttered, written, or composed by sibyls; like the productions of sibyls. [ 1913 Webster ]
Sibylline books. (a) (Rom. Antiq.) Books or documents of prophecies in verse concerning the fate of the Roman empire, said to have been purchased by Tarquin the Proud from a sibyl.(b)Certain Jewish and early Christian writings purporting to have been prophetic and of sibylline origin. They date from 100 b. c. to a. d. 500. [ 1913 Webster ]
(adj) having a secret or hidden meaning; ; ; - John Gunther, Syn. qabalistic, sibylline, cryptic, kabbalistic, cryptical, Example:cabalistic symbols engraved in stone; cryptic writings; thoroughly sibylline in most of his pronouncements
(adj) resembling or characteristic of a prophet or prophecy, Syn. mantic, vatical, sibylline, sibyllic, vatic, Example:the high priest's divinatory pronouncement; mantic powers; a kind of sibylline book with ready and infallible answers to questions