Source : Webster's Revised Unabridged Dictionary (1913)

Realization \Re`al*i*za"tion\, n. [Cf. F. r['e]alisation.]
   The act of realizing, or the state of being realized.

Source : WordNet®

realization
     n 1: coming to understand something clearly and distinctly; "a
          growing realization of the risk involved"; "a sudden
          recognition of the problem he faced"; "increasing
          recognition that diabetes frequently coexists with other
          chronic diseases" [syn: {realisation}, {recognition}]
     2: making real or giving the appearance of reality [syn: {realisation},
         {actualization}, {actualisation}]
     3: a musical composition that has been completed or enriched by
        someone other than the composer [syn: {realisation}]
     4: a sale in order to obtain money (as a sale of stock or a
        sale of the estate of a bankrupt person) or the money so
        obtained [syn: {realisation}]
     5: the completion or enrichment of a piece of music left
        sparsely notated by a composer [syn: {realisation}]
     6: something that is made real or concrete; "the victory was
        the realization of a whole year's work" [syn: {realisation},
         {fruition}]