noun
paganism; heathenism; non-mainstream religion
Refers to religions outside the dominant tradition, especially from a monotheistic perspective. Often used in historical or comparative religion contexts.
古代ローマではキリスト教は異教と見なされていた。
In ancient Rome, Christianity was considered a pagan religion.
異教の神々を祀る祭りが行われた。
A festival was held to worship the pagan gods.