What is the meaning of Demon?

An evil supernatural spirit.

1. An evil spirit resident in or working for Hell; a devil.
2. A false god or idol; a Satanic divinity.
3. A very wicked or malevolent person; also a mischievous person, especially a child.
4. A source (especially personified) of great evil or wickedness; a destructive feeling or character flaw.

   An evil spirit resident in or working for Hell; a devil.

   A false god or idol; a Satanic divinity.

   A very wicked or malevolent person; also a mischievous person, especially a child.

   A source (especially personified) of great evil or wickedness; a destructive feeling or character flaw.

   A person's fears or anxieties.

   A neutral supernatural spirit.

   1. A person's inner spirit or genius; a guiding or creative impulse.
   2. A tutelary deity or spirit intermediate between the major Olympian gods and mankind, especially a deified hero or the entity which supposedly guided Socrates, telling him what not to do.
   3. A spirit not considered to be inherently evil; a (non-Christian) deity or supernatural being.
   4. A hypothetical entity with special abilities postulated for the sake of a thought experiment in philosophy or physics.

   A person's inner spirit or genius; a guiding or creative impulse.

   A tutelary deity or spirit intermediate between the major Olympian gods and mankind, especially a deified hero or the entity which supposedly guided Socrates, telling him what not to do.

   A spirit not considered to be inherently evil; a (non-Christian) deity or supernatural being.

   A hypothetical entity with special abilities postulated for the sake of a thought experiment in philosophy or physics.

   Someone with great strength, passion or skill for a particular activity, pursuit etc.; an enthusiast.

   A type of patience or solitaire (card game) played in the UK and/or US.

   Any of various hesperiid butterflies of the genera Notocrypta and Udaspes.

   Acronym of distinct electron motion particle: A quasiparticle, a type of massless neutral electron excitation associated with superconductivity.

   Alternative spelling of daemon

   genius, lar

   demon

   genitive singular of demo

   accusative singular of dēmos

   demon, devil, malicious spirit

   daimon, helpful spirit

   a demon

   a demon

   demon, devil

   the Devil

   demon (evil supernatural spirit)

   daemon (running program that does not have a controlling terminal)

   demon

   a despicable person

   demon

   a demon (evil spirit)

   a demon (neutral spirit)

   a demon (personification of anxiety and the like)

   Source: wiktionary.org