Source : Webster's Revised Unabridged Dictionary (1913)

Disinterest \Dis*in"ter*est\, p. a.
   Disinterested. [Obs.]

         The measures they shall walk by shall be disinterest
         and even.                                --Jer. Taylor.

Disinterest \Dis*in"ter*est\, n.
   1. What is contrary to interest or advantage; disadvantage.
      [Obs.] --Glanvill.

   2. Indifference to profit; want of regard to private
      advantage; disinterestedness. [Obs.] --Johnson.

Disinterest \Dis*in"ter*est\, v. t.
   To divest of interest or interested motives. [Obs.]
   --Feltham.

Source : WordNet®

disinterest
     n : tolerance attributable to a lack of involvement [syn: {neutrality}]