Source : Webster's Revised Unabridged Dictionary (1913)

Vaporization \Vap`o*ri*za"tion\, n. [Cf. F. vaporisation.]
   The act or process of vaporizing, or the state of being
   converted into vapor; the artificial formation of vapor;
   specifically, the conversion of water into steam, as in a
   steam boiler.

Source : WordNet®

vaporization
     n 1: annihilation by vaporizing something [syn: {vaporisation}]
     2: the process of becoming a vapor [syn: {vaporisation}, {vapor},
         {vapour}, {evaporation}]