The Collaborative International Dictionary of English v.0.48:

Spiritualize \Spir"it*u*al*ize\, v. t. [imp. & p. p.
   Spiritualized; p. pr. & vb. n. Spiritualizing.] [Cf. F.
   spiritualiser.]
   1. To refine intellectiually or morally; to purify from the
      corrupting influence of the world; to give a spiritual
      character or tendency to; as, to spiritualize soul.
      [1913 Webster]

            This seen in the clear air, and the whole
            spiritualized by endless recollections, fills the
            eye and the heart more forcibly than I can find
            words to say.                         --Carlyle.
      [1913 Webster]

   2. To give a spiritual meaning to; to take in a spiritual
      sense; -- opposed to literalize.
      [1913 Webster]

   3. (Old Chem.) To extract spirit from; also, to convert into,
      or impregnate with, spirit.
      [1913 Webster]