Source : Webster's Revised Unabridged Dictionary (1913)

Dissipate \Dis"si*pate\, v. t. [imp. & p. p. {Dissipated}; p.
   pr. & vb. n. {Dissipating}.] [L. dissipatus, p. p. of
   dissipare; dis- + an obsolete verb sipare, supare. to throw.]
   1. To scatter completely; to disperse and cause to disappear;
      -- used esp. of the dispersion of things that can never
      again be collected or restored.

            Dissipated those foggy mists of error. --Selden.

            I soon dissipated his fears.          --Cook.

            The extreme tendency of civilization is to dissipate
            all intellectual energy.              --Hazlitt.

   2. To destroy by wasteful extravagance or lavish use; to
      squander.

            The vast wealth . . . was in three years dissipated.
                                                  --Bp. Burnet.

   Syn: To disperse; scatter; dispel; spend; squander; waste;
        consume; lavish.