1. (a.) Indicating something future by signs or symptoms; foreshowing; aiding in prognosis; as, the prognostic symptoms of a disease; prognostic signs.

2. (a.) That which prognosticates; a sign by which a future event may be known or foretold; an indication; a sign or omen; hence, a foretelling; a prediction.

3. (n.) A sign or symptom indicating the course and termination of a disease.

4. (v. t.) To prognosticate.

apocalyptic augural auguring augury boding divinatory fatidic forecasting forerunning foreseeing foreshadowing foreshowing foretelling foretokening forewarning fortunetelling haruspical heavy with meaning indicative intuitive mantic meaningful monitory omen oracular portent precursive precursory predictional predictive predictory prefigurative prefiguring preindicative premonitory presage presageful presaging presignificative presignifying prognosticative prophetic sibyllic sibylline significant vaticinal vaticinatory warning weather-wise