1. (n.) A spirit, or immaterial being, holding a middle place between men and deities in pagan mythology.

2. (n.) One's genius; a tutelary spirit or internal voice; as, the demon of Socrates.

3. (n.) An evil spirit; a devil.

His Satanic Majesty Lucifer Satan Satanas the Adversary the Arch-fiend the Common Enemy the Demon the Devil the Devil Incarnate the Evil One the Evil Spirit the Fiend the Foul Fiend the Old Enemy the Old Serpent the Tempter the Wicked One the archenemy the serpent