poly·the·ism /ˈpɑli(ˌ)θiˌɪzəm/
  多神教,多神論
  Pol·y·the·ism n.  The doctrine of, or belief in, a plurality of gods.
     In the Old Testament, the gradual development of polytheism from the primitive monotheism may be learned.   --Shaff-Herzog.
  ◄ ►
  polytheism
       n : belief in multiple Gods [ant: monotheism]