demonn.[F. dmon, L. daemon a spirit, an evil spirit, fr. Gr. dai`mwn a divinity; of uncertain origin.]1. (Gr. Antiq.) A spirit, or immaterial being, holding a middle place between men and deities in pagan mythology.()The demon kind is of an intermediate nature between the divine and the human. (Sydenham.)2. One's genius; a tutelary spirit or internal voice; as, the demon of Socrates.()3. An evil spirit; a devil.()That same demon that hath gulled thee thus. (Shak.)