The devil (from Greek: διάβολος or diábolos = slanderer or accuser) is believed in many religions and cultures to be the personification of evil and the archenemy of humankind.

While mainstream Judaism contains no overt concept of a devil, Christianity and Islam have regarded the devil as a fallen angel or jinn, respectively, who tempts humans to sin and commits evil deeds himself. In these religions – particularly during periods of division or external threat – the devil has assumed more of a dualistic status commonly associated with heretics, infidels, and other unbelievers.