noun
barbarian; savage; uncivilized person
A dated, often derogatory term for a person from a culture considered uncivilized or primitive. In modern contexts, it can sound archaic or offensive; used mainly in historical or literary descriptions.
古代ローマ人はゲルマン人を蛮人と呼んだ。
The ancient Romans called the Germanic peoples barbarians.
その小説では、蛮人が村を襲う場面
In that novel, there is a scene where savages attack a village.
Compound of 蛮 (ban, 'barbarian') + 人 (jin, 'person'). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'barbarian person'.