Source : Webster's Revised Unabridged Dictionary (1913)

Thereof \There*of"\, adv.
   Of that or this.

         In the day that thou eatest thereof, thou shalt surely
         die.                                     --Gen. ii. 17.

Source : WordNet®

thereof
     adv 1: of or concerning this or that; "a problem and the solution
            thereof"
     2: from that circumstance or source; "atomic formulas and all
        compounds thence constructible"- W.V.Quine; "a natural
        conclusion follows thence"; "public interest and a policy
        deriving therefrom"; "typhus fever results therefrom"
        [syn: {thence}, {therefrom}]