Source : Webster's Revised Unabridged Dictionary (1913)

Prognostication \Prog*nos`ti*ca"tion\, n. [Cf. F.
   prognostication.]
   1. The act of foreshowing or foretelling something future by
      present signs; prediction.

   2. That which foreshows; a foretoken. --Shak.

Source : WordNet®

prognostication
     n 1: a sign of something about to happen; "he looked for an omen
          before going into battle" [syn: {omen}, {portent}, {presage},
           {prognostic}, {prodigy}]
     2: a statement made about the future [syn: {prediction}, {foretelling},
         {forecasting}]
     3: knowledge of the future (usually said to be obtained from a
        divine source) [syn: {prophecy}, {vaticination}]