| Definitions | proper noun
- General usage: Religion and philosophy based on the teachings ascribed to the prophet w:Zoroaster, Zoroaster. Also referred to as Zoroastrism and
- Mazdaism: religion in which w:Ahura Mazda, Ahura Mazda is the supreme divinity;
- Parseeism (archaic): religion of the w:Parsi, Parsees of the Indian subcontinent, for centuries believed to be the only surviving community of Zoroastrians.
- Scholastic usage: identifies the religion as it exists today, as distinguished from earlier forms of the religion. (see Related terms, below).
Translations: - Dutch: Zoroastrisme
- French: Zoroastrisme
- German: Zoroastrismus
- Italian: Zoroastrismo
- Spanish: Zoroastrismo

| |
|