prognostication

[Cf. F. prognostication.]

1. The act of foreshowing or foretelling something future by present signs; prediction.

2. That which foreshows; a foretoken. Shak.

noun

1. The act of predicting: forecast, outlook, prediction, prognosis, projection. See foresight.
2. A phenomenon that serves as a sign or warning of some future good or evil: augury, forerunner, foretoken, omen, portent, prefigurement, presage, prognostic, sign. Idioms: writinghandwritingon the wall. See foresight, warn/invite.

The noun has 3 meanings:

Meaning #1: a sign of something about to happen
  Synonyms: omen, portent, presage, prognostic

Meaning #2: a statement made about the future
  Synonyms: prediction, foretelling, forecasting

Meaning #3: knowledge of the future (usually said to be obtained from a divine source)
  Synonyms: prophecy, vaticination