1. A spirit, or immaterial being, holding a middle place between men and deities in pagan mythology. The demon kind is of an inmediate nature between the divine and the human. (Sydenham)
2. One’s genius; a tutelary spirit or internal voice; as, the demon of Socrates. Often written daemon.
3. An evil spirit; a devil. That same demon that hath gulled thee thus. (Shak)
Origin: f. Demon, L. Daemon a spirit, an evil spirit, fr. Gr. A divinity; of uncertain origin.