Definition of maniac in English:

maniac

noun ˈmeɪnɪakˈmeɪniˌæk

1A person exhibiting extremely wild or violent behaviour.
when he sits in front of a PlayStation he transforms into a karate-choppin' maniac
Example sentencesExamples
- He pounded one hand on my back, grinning like a maniac.
- Swinging around like a maniac would get me nowhere.
- Instead, she is standing on a corner in Edinburgh's New Town, clutching a large, flowery bag, waving like a maniac.
- I arose from bed to see why Stan yelled like a maniac.
- Johnson starts roaring like a maniac, laughing like there's no tomorrow.
- He is not a homicidal maniac, but a violent, evil man made even more so by his addiction to unnamed drugs.
- He had done his duty to the community by shutting up a wandering and probably dangerous maniac.
- I just laughed like a maniac, remembering previous events.
- I ducked my head so I wouldn't start grinning like a maniac.
- I lost several pounds and I looked like a maniac.
- He was puffing slightly and grinning like a maniac.
- I don't endorse driving like a maniac, but yesterday I drove like one.
- He screamed, running like a maniac to the side of my car.
- I know I am a paranoid, psychotic, evil maniac.
- He's not some crazy maniac, he's just somebody you would want to talk to.
- ‘Yes, and I'm laughing like a maniac, too,’ Selas growled in response.
- I can almost see him, hunched over the drawing board, laughing like a maniac as each scene explodes into life before his eyes.
- He was a psychotic maniac who got what he deserved.
- Lee was still on the phone giggling like a maniac.
- The driver was screaming like a maniac at this stage.
1. 1.1informal with adjective or noun modifier An obsessive enthusiast.
  〈非正式〉入迷于…的人，热衷于…的人
  a religious maniac
  宗教迷。
  Example sentencesExamples
  A night of petrol-fuelled hedonism is in store at Wimbledon Greyhound Stadium on Sunday where motor maniacs can admire a human canon ball, a monster truck, fire stunts and car crashes.
  This was one for the war buffs amongst the motoring maniacs.
  I just don't think at any stage they are going to be able to make a credible case that he is some sort of right-wing maniac.
  Synonyms
  enthusiast, fan, addict, devotee, aficionado
  informal freak, fiend, nut, buff
2. 1.2Psychiatry archaic A person suffering from mania.
  〔精神病学〕〈古〉躁狂者，躁狂症患者
  Synonyms
  lunatic, madman, madwoman, mad person, deranged person, psychopath, psychotic
  informal loony, fruitcake, nut, nutter, nutcase, nutjob, cuckoo, psycho, screwball, head case, headbanger, sicko
  Scottish informal radge
  North American informal crazy, kook, meshuggener, nutso
  US informal wing nut

Origin

Early 16th century (as an adjective): via late Latin from late Greek maniakos, from mania (see mania).

Rhymes

bibliomaniac, dipsomaniac, egomaniac, kleptomaniac, megalomaniac, monomaniac, nymphomaniac, pyromaniac

Definition of maniac in US English:

maniac

nounˈmeɪniˌækˈmānēˌak

1A person exhibiting extreme symptoms of wild behavior, especially when violent and dangerous.
（尤指有狂暴与危险外在表现的）疯子，狂人
a homicidal maniac
杀人狂。
Example sentencesExamples
- He is not a homicidal maniac, but a violent, evil man made even more so by his addiction to unnamed drugs.
- He screamed, running like a maniac to the side of my car.
- I just laughed like a maniac, remembering previous events.
- He's not some crazy maniac, he's just somebody you would want to talk to.
- I know I am a paranoid, psychotic, evil maniac.
- He pounded one hand on my back, grinning like a maniac.
- I lost several pounds and I looked like a maniac.
- Johnson starts roaring like a maniac, laughing like there's no tomorrow.
- I can almost see him, hunched over the drawing board, laughing like a maniac as each scene explodes into life before his eyes.
- Lee was still on the phone giggling like a maniac.
- I arose from bed to see why Stan yelled like a maniac.
- He was a psychotic maniac who got what he deserved.
- The driver was screaming like a maniac at this stage.
- Swinging around like a maniac would get me nowhere.
- I ducked my head so I wouldn't start grinning like a maniac.
- He was puffing slightly and grinning like a maniac.
- I don't endorse driving like a maniac, but yesterday I drove like one.
- He had done his duty to the community by shutting up a wandering and probably dangerous maniac.
- ‘Yes, and I'm laughing like a maniac, too,’ Selas growled in response.
- Instead, she is standing on a corner in Edinburgh's New Town, clutching a large, flowery bag, waving like a maniac.
1. 1.1informal with adjective or noun modifier An obsessive enthusiast.
  〈非正式〉入迷于…的人，热衷于…的人
  a gambling maniac
  Example sentencesExamples
  A night of petrol-fuelled hedonism is in store at Wimbledon Greyhound Stadium on Sunday where motor maniacs can admire a human canon ball, a monster truck, fire stunts and car crashes.
  I just don't think at any stage they are going to be able to make a credible case that he is some sort of right-wing maniac.
  This was one for the war buffs amongst the motoring maniacs.
  Synonyms
  enthusiast, fan, addict, devotee, aficionado
2. 1.2Psychiatry archaic A person suffering from mania.
  〔精神病学〕〈古〉躁狂者，躁狂症患者
  Synonyms
  lunatic, madman, madwoman, mad person, deranged person, psychopath, psychotic

Origin

Early 16th century (as an adjective): via late Latin from late Greek maniakos, from mania (see mania).

词汇	maniac
释义	Definition of maniac in English: maniac noun ˈmeɪnɪakˈmeɪniˌæk 1A person exhibiting extremely wild or violent behaviour. when he sits in front of a PlayStation he transforms into a karate-choppin' maniac Example sentencesExamples He pounded one hand on my back, grinning like a maniac. Swinging around like a maniac would get me nowhere. Instead, she is standing on a corner in Edinburgh's New Town, clutching a large, flowery bag, waving like a maniac. I arose from bed to see why Stan yelled like a maniac. Johnson starts roaring like a maniac, laughing like there's no tomorrow. He is not a homicidal maniac, but a violent, evil man made even more so by his addiction to unnamed drugs. He had done his duty to the community by shutting up a wandering and probably dangerous maniac. I just laughed like a maniac, remembering previous events. I ducked my head so I wouldn't start grinning like a maniac. I lost several pounds and I looked like a maniac. He was puffing slightly and grinning like a maniac. I don't endorse driving like a maniac, but yesterday I drove like one. He screamed, running like a maniac to the side of my car. I know I am a paranoid, psychotic, evil maniac. He's not some crazy maniac, he's just somebody you would want to talk to. ‘Yes, and I'm laughing like a maniac, too,’ Selas growled in response. I can almost see him, hunched over the drawing board, laughing like a maniac as each scene explodes into life before his eyes. He was a psychotic maniac who got what he deserved. Lee was still on the phone giggling like a maniac. The driver was screaming like a maniac at this stage. 1.1informal with adjective or noun modifier An obsessive enthusiast. 〈非正式〉入迷于…的人，热衷于…的人 a religious maniac 宗教迷。 Example sentencesExamples A night of petrol-fuelled hedonism is in store at Wimbledon Greyhound Stadium on Sunday where motor maniacs can admire a human canon ball, a monster truck, fire stunts and car crashes. This was one for the war buffs amongst the motoring maniacs. I just don't think at any stage they are going to be able to make a credible case that he is some sort of right-wing maniac. Synonyms enthusiast, fan, addict, devotee, aficionado informal freak, fiend, nut, buff 1.2Psychiatry archaic A person suffering from mania. 〔精神病学〕〈古〉躁狂者，躁狂症患者 Synonyms lunatic, madman, madwoman, mad person, deranged person, psychopath, psychotic informal loony, fruitcake, nut, nutter, nutcase, nutjob, cuckoo, psycho, screwball, head case, headbanger, sicko Scottish informal radge North American informal crazy, kook, meshuggener, nutso US informal wing nut Origin Early 16th century (as an adjective): via late Latin from late Greek maniakos, from mania (see mania). Rhymes bibliomaniac, dipsomaniac, egomaniac, kleptomaniac, megalomaniac, monomaniac, nymphomaniac, pyromaniac Definition of maniac in US English: maniac nounˈmeɪniˌækˈmānēˌak 1A person exhibiting extreme symptoms of wild behavior, especially when violent and dangerous. （尤指有狂暴与危险外在表现的）疯子，狂人 a homicidal maniac 杀人狂。 Example sentencesExamples He is not a homicidal maniac, but a violent, evil man made even more so by his addiction to unnamed drugs. He screamed, running like a maniac to the side of my car. I just laughed like a maniac, remembering previous events. He's not some crazy maniac, he's just somebody you would want to talk to. I know I am a paranoid, psychotic, evil maniac. He pounded one hand on my back, grinning like a maniac. I lost several pounds and I looked like a maniac. Johnson starts roaring like a maniac, laughing like there's no tomorrow. I can almost see him, hunched over the drawing board, laughing like a maniac as each scene explodes into life before his eyes. Lee was still on the phone giggling like a maniac. I arose from bed to see why Stan yelled like a maniac. He was a psychotic maniac who got what he deserved. The driver was screaming like a maniac at this stage. Swinging around like a maniac would get me nowhere. I ducked my head so I wouldn't start grinning like a maniac. He was puffing slightly and grinning like a maniac. I don't endorse driving like a maniac, but yesterday I drove like one. He had done his duty to the community by shutting up a wandering and probably dangerous maniac. ‘Yes, and I'm laughing like a maniac, too,’ Selas growled in response. Instead, she is standing on a corner in Edinburgh's New Town, clutching a large, flowery bag, waving like a maniac. 1.1informal with adjective or noun modifier An obsessive enthusiast. 〈非正式〉入迷于…的人，热衷于…的人 a gambling maniac Example sentencesExamples A night of petrol-fuelled hedonism is in store at Wimbledon Greyhound Stadium on Sunday where motor maniacs can admire a human canon ball, a monster truck, fire stunts and car crashes. I just don't think at any stage they are going to be able to make a credible case that he is some sort of right-wing maniac. This was one for the war buffs amongst the motoring maniacs. Synonyms enthusiast, fan, addict, devotee, aficionado 1.2Psychiatry archaic A person suffering from mania. 〔精神病学〕〈古〉躁狂者，躁狂症患者 Synonyms lunatic, madman, madwoman, mad person, deranged person, psychopath, psychotic Origin Early 16th century (as an adjective): via late Latin from late Greek maniakos, from mania (see mania).
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