Definition of Zoroaster in US English:

Zoroaster

proper noun

  • (c.628–c.551 BC), Persian prophet and founder of Zoroastrianism; Avestan name Zarathustra. Traditionally, he was born in Persia and began to preach the tenets of what was later called Zoroastrianism after receiving a vision from Ahura Mazda.

Pronunciation

Zoroaster

/ˈzɔroʊˌæstər//ˈzôrōˌastər/