If you mention the word history you should first of all do a short check somewheregomanutd wrote:no, basic history...
(there is a brand new tool called wikipedia. Interesting projcet... you might want to try it once)
And hence any dictionary which is worth the name should give you something around the lines of:A demon (or daemon, from Ancient Greek, δαίμων daímōn), is a supernatural being from various religions, occultisms, literatures, and folklores that is described as something that is not human and, in ordinary (almost universal) usage, malevolent. The original neutral Greek word "daimon" does not carry the negative connotation initially understood by implementation of the Koine (Hellenistic and New Testament Greek) δαιμόνιον (daimonion),[1] and later ascribed to any cognate words sharing the root, originally intended to denote a spirit or spiritual being.
demon ~ noun uncommon
1. an evil supernatural being
2. a cruel wicked and inhuman person
3. someone extremely diligent or skillful
he worked like a demon to finish the job on time; she's a demon at math