異端者
い
た
ん
しゃ
Meanings
1
Primarily used in religious contexts to refer to someone who holds beliefs contrary to orthodox doctrine.
In the Middle Ages, heretics were sometimes burned at the stake.
2
nonconformist; freethinker; iconoclast; rebel
Extended to secular contexts: a person who rejects conventional ideas, norms, or authority; often carries a nuance of intellectual independence or defiance.
He is known as an iconoclast in academic circles.
That politician is treated as a rebel within the party.