Source : Webster's Revised Unabridged Dictionary (1913)

Stochastic \Sto*chas"tic\ (st[-o]*k[a^]s"t[i^]k), a. [Gr.
   stochastiko`s, from stocha`zesqai to aim, to guess, fr.
   sto`chos mark or aim.]
   1. Conjectural; able to conjecture. [Obs.] --Whitefoot.

Source : WordNet®

stochastic
     adj : being or having a random variable; "a stochastic variable";
           "stochastic processes"

Source : Free On-Line Dictionary of Computing

stochastic
     
        {probabilistic}