Source : Webster's Revised Unabridged Dictionary (1913)

Pantheism \Pan"the*ism\, n. [Pan- + theism.]
   The doctrine that the universe, taken or conceived of as a
   whole, is God; the doctrine that there is no God but the
   combined force and laws which are manifested in the existing
   universe; cosmotheism.

Source : WordNet®

pantheism
     n 1: (rare) worship that admits or tolerates all gods
     2: the doctrine or belief that God is the universe and its
        phenomena (taken or conceived of as a whole) or the
        doctrine that regards the universe as a manifestation of
        God