Source : Webster's Revised Unabridged Dictionary (1913)

Zionism \Zi"on*ism\, n. [Zion + -ism.]
   Among the Jews, a theory, plan, or movement for colonizing
   their own race in Palestine, the land of Zion, or, if that is
   impracticable, elsewhere, either for religious or
   nationalizing purposes; -- called also {Zion movement}. --
   {Zi"on*ist}, n. -- {Zi`on*is"tic}, a.

Source : WordNet®

Zionism
     n 1: a policy for establishing and developing a national homeland
          for Jews in Palestine
     2: a movement of world Jewry that arose late in the 19th
        century with the aim of creating a Jewish state in
        Palestine [syn: {Zionist movement}]