The Collaborative International Dictionary of English v.0.48:

Gasify \Gas"i*fy\, v. t. [imp. & p. p. Gasified; p. pr. & vb.
   n. Gasifying.] [Gas + -fy.]
   To convert into a gas, as by the application of heat, or by
   chemical processes.
   [1913 Webster]

WordNet (r) 3.0 (2006):

gasified
    adj 1: converted into a gas or vapor [syn: gasified,
           vaporized, vapourised, volatilized, volatilised]