demon Definition
demonnoun 1. An evil spirit.
Thesaurus: devil, evil spirit, goblin, monster, incubus, succubus.
2. A cruel or evil person.
Thesaurus: villain, fiend, brute, rogue, rascal, beast.
3. Someone who has great energy, enthusiasm or skill.
Example: a demon at football
4. A good or friendly spirit; a daemon (sense 2).
Etymology: 15c: from Greek
daimon spirit; in later Greek including that used in the New Testament, meaning ‘a devil'.