Source : Webster's Revised Unabridged Dictionary (1913)

Actualize \Ac"tu*al*ize\, v. t.
   To make actual; to realize in action. [R.] --Coleridge.

Source : WordNet®

actualize
     v 1: make real or concrete; give reality or substance to; "our
          ideas must be substantiated into actions" [syn: {realize},
           {realise}, {actualise}, {substantiate}]
     2: represent or describe realistically [syn: {actualise}]