2 definitions found From WordNet (r) 2.0 [wn]: Zoroastrianism noun: 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) [syn: {Mazdaism}] From The Collaborative International Dictionary of English v.0.44 [gcide]: Zoroastrianism \Zo'ro*as"tri*an*ism\, noun The religious system of Zoroaster, the legislator and prophet of the ancient Persians, which was the national faith of Persia; mazdeism. The system presupposes a good spirit (Ormuzd) and an opposing evil spirit (Ahriman). Cf. {Fire worship}, under {Fire}, and {Parsee}.

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