Synonyms for oracular

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1. Vague or obscure

   ambiguous, mysterious, cryptic; see obscure 1, 3, vague 2.

2. Prophetic

   prescient, soothsaying, foretelling, prophesying, forecasting, predicting, presaging, foreboding, auguring, augural, precursory, portending, prognosticating, discovering, divining, foreknowing, foreseeing, clairvoyant, divulging, anticipating, apprehending, declaring, proclaiming, fatidic, occult, sibylline, vaticinal, vatic, interpretive; see also mysterious 2.

   Antonyms objective*, scientific, realistic.

3. Authoritative

   dogmatic, peremptory, imperious; see authoritative 2.