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Noun: Zoroastrianism  ,zor-ow'as-tree-u,ni-zum or ,zór-ow'as-tree-u,ni-zum [N. Amer], ,zó-row'as-tree-u,ni-zum [Brit]
  1. System of religion founded in Persia in the 6th century BC by Zoroaster; set forth in the Zend-Avesta; based on concept of struggle between light (good) and dark (evil)
    - Mazdaism

Type of: belief, faith, religion, religious belief

Encyclopedia: Zoroastrianism