де́мон — meaning in English

demon

English meaning

daemon noun In computing, a background program that runs without direct user control, handling ongoing tasks.
demon noun An evil supernatural being, often associated with hell or wickedness.
fiend noun An evil or demonic being; by extension, a cruel or wicked person.
incubus noun In medieval European folklore, a male demon believed to settle on people as they sleep and cause nightmares.

де́мон is used for these senses in English:

daemon (computing, Unix) A process (a running program) that does not have a controlling terminal.
demon (now, chiefly, historical) A false god or idol; a Satanic divinity. [from 10th c.]
demon An evil spirit resident in or working for Hell; a devil. [from 10th c.]
fiend A devil or demon; a malignant or diabolical being; an evil spirit.
incubus (medieval folklore) An evil spirit supposed to oppress people while asleep, especially to have sex with women as they sleep.

noun An evil supernatural being, often associated with hell or wickedness.
noun A destructive habit, feeling, or personal struggle, especially one someone battles internally.
noun Someone with remarkable skill, energy, or intensity at an activity.