Read the dictionary definition of sibylline. All definitions for this word.
1. having a secret or hidden meaning
1. cabalistic symbols engraved in stone
2. cryptic writings
3. thoroughly sibylline in most of his pronouncements
2. resembling or characteristic of a prophet or prophecy
1. the high priest's divinatory pronouncement
2. mantic powers
3. a kind of sibylline book with ready and infallible answers to questions