There are 3 main definitions of demon in English:

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demon1

Line breaks: demon
Pronunciation: /ˈdiːmən
 
/

noun

1An evil spirit or devil, especially one thought to possess a person or act as a tormentor in hell: he was possessed by an evil demon each of the damned souls was guarded by a group of hideous demons
More example sentences
  • But there is simply no credible evidence to suggest the boy was possessed by demons or evil spirits.
  • Tibetans treat the blind as outcasts because they believe they are possessed by demons or have committed evil in a prior life.
  • In Tartini's time, the Devil personified the spirit of evil, a demon, the ruler of Hell, and the chief adversary of God.
Synonyms
devil, fiend, evil spirit, fallen angel, cacodemon;
Arabian & Muslim mythology afreet;
Hindu mythology rakshasa
1.1A cruel, evil, or unmanageable person: I was a little demon, I can tell you
More example sentences
  • No, they are not animals, they are evil demons who hide under the cloak of kindness and normality while they hatch their plots.
  • Why did he go from nearly human to cruel demon in a heartbeat?
  • Three, I'm a sadistic demon that delights in your emotional pain.
Synonyms
1.2A powerful, often destructive compulsion or obsession: he is plagued by demons which go back to his childhood
More example sentences
  • Both men were driven by powerful inner demons, throughout their childhood and into adulthood.
  • Plagued by demons of hate and angels of mercy, she had become his damsel in distress needing permanent rescuing.
  • Gerald suffers in his relationship with Gudrun, his mixture of violence and weakness arousing a destructive demon in her.
1.3Something very insidious and harmful: the demon of sexism [as modifier]: the demon drink
More example sentences
  • Barely three years ago, O'Sullivan was at rock-bottom and shut away in The Priory battling three demons - drugs, drink and depression.
  • Why do all my exes look so good, why haven't they fallen apart, lost themselves to the demons of drink, ended up in rehab, ended up in therapy.
  • Virtually everyone drinks the demon brew these days, even if it's cheap plonk bought in the supermarket at Mar'ton, much to the regret of Mean Mike at the post office.
1.4 [mass noun] Reckless mischief; devilry: his eyes are bursting with pure demon
More example sentences
  • So how odd that Howard should invest so much time and political capital in building a whole speech round this non-existent demon.
2 [often as modifier] A forceful or skilful performer of a specified activity: a friend of mine is a demon cook
More example sentences
  • Our first tests of the company's new speed demon show some impressive performance gains.
  • Remember those occasions when he would have made batting easy for his partners by taking on the demon bowlers all by himself.
  • Cotton might not be the demon fabric that performance apparel manufacturers say it is, but I'm going to keep my Under Armour shirt.
Synonyms
star;
informal hotshot, wiz, whizz, whizz-kid, buff, ninja, old hand, pro, ace, something else, something to shout about, something to write home about
British informal dab hand
North American informal maven, crackerjack
rare proficient
3 another term for daemon1 (sense 1).
Example sentences
  • The gods of the world are having trouble keeping the demons at bay, and so they come up with a last-ditch scheme - to resurrect a dead hero.

Origin

Middle English: from medieval Latin, from Latin daemon, from Greek daimōn 'deity, genius'; in sense 1 also from Latin daemonium 'lesser or evil spirit', from Greek daemonion, diminutive of daimōn.

Phrases

like a demon

1
In a very forceful, fierce, or skilful way: he worked like a demon
More example sentences
  • We had our excuses - Papa watched TV late and loud and snored like a demon and my reading lamp bothered Mother.
  • Toby in front of me was rowing like a demon, his competitiveness harnessed and proving very effective and Wheelie kept bellowing and keeping us focused.
  • After all, he scored the first goal, made the third and defended like a demon for the two periods of extra-time.

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There are 3 main definitions of demon in English:

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demon2

Line breaks: demon
Pronunciation: /ˈdiːmən
 
/

noun

Australian /NZ informal
A police officer.
Example sentences
  • I only wish I had one of them button-hole cameras you see advertised - the demons use them I believe.
  • Demons were flown up from the south to make enquiries.

Origin

late 19th century: perhaps from Van Diemen's Land, an early name for Tasmania, or based on dee (slang term for detective) + man.

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There are 3 main definitions of demon in English:

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demon3

Line breaks: demon

noun

Variant spelling of daemon2.

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