Source : Webster's Revised Unabridged Dictionary (1913)

Demiurge \Dem"i*urge\, n. [Gr. dhmioyrgo`s a worker for the
   people, a workman, especially the maker of the world, the
   Creator; dh`mios belonging to the people (fr. dh^mos the
   people) + 'e`rgon a work.]
   1. (Gr. Antiq.) The chief magistrate in some of the Greek
      states.

   2. God, as the Maker of the world.

   3. According to the Gnostics, an agent or one employed by the
      Supreme Being to create the material universe and man.

Source : WordNet®

demiurge
     n : a subordinate deity, in some philosophies the creator of the
         universe