The Collaborative International Dictionary of English v.0.48:

Idealize \I*de"al*ize\, v. t. [imp. & p. p. Idealized; p. pr.
   & vb. n. Idealizing.]
   1. To make ideal; to consider as ideal; to give an ideal form
      or value to; to attribute ideal characteristics and
      excellences to; as, to idealize real life. [WordNet sense
      1]
      [1913 Webster]

   2. (Fine Arts) To treat in an ideal manner. See
      Idealization, 2.
      [1913 Webster]

   3. to form ideals. [WordNet sense 2]
      [WordNet 1.5]