Source : Webster's Revised Unabridged Dictionary (1913)

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