1. (adj)omen, portent, presage, prognostic, prognostication, prodigy a sign of something about to happen Synonyms: prophecy, presage, portent, prodigy, prediction, omen, foretelling, prognostication, prognostic, vaticination, forecasting Antonyms: unprophetic
2. (adj)predictive, prognostic, prognosticative of or relating to prediction; having value for making predictions Synonyms: prognosticative, prognostic, predictive Antonyms: unprophetic