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
<noun.cognition>
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 natural laws which are manifested in the existing universe; cosmotheism. The doctrine denies that God is a rational personality.