Source : Webster's Revised Unabridged Dictionary (1913)

Computation \Com`pu*ta"tion\, n. [L. computatio: cf. F.
   computation.]
   1. The act or process of computing; calculation; reckoning.

            By just computation of the time.      --Shak.

            By a computation backward from ourselves. --Bacon.

   2. The result of computation; the amount computed.

   Syn: Reckoning; calculation; estimate; account.

Source : WordNet®

computation
     n 1: the procedure of calculating; determining something by
          mathematical or logical methods [syn: {calculation}, {computing}]
     2: problem solving that involves numbers or quantities [syn: {calculation},
         {figuring}, {reckoning}]