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Definition of sibylline:

  1. Pertaining to the sibyls; uttered, written, or composed by sibyls; like the productions of sibyls.


hypothetical, supposed, qabalistic, foresight, inscrutable, deep, augural, vatical, oracular, fatidic, visionary, sibyllic, mystifying, divinitory, kabbalistic, suppositional, esoteric, fatidical, divinatory, mysterious, cryptic, conjectural, vaticinal, cryptical, prophetic, vatic, prophetical, hypothetic, cabalistic, mantic, suppositious, supposititious.

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