Source : Webster's Revised Unabridged Dictionary (1913)

Dematerialize \De`ma*te"ri*al*ize\, v. t.
   To deprive of material or physical qualities or
   characteristics.

         Dematerializing matter by stripping it of everything
         which . . . has distinguished matter.    --Milman.

Source : WordNet®

dematerialize
     v : become immaterial; disappear [syn: {dematerialise}] [ant: {happen},
          {happen}]