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maniac Line breaks: ma¦niac
Pronunciation: /ˈmeɪnɪak/

Definition of maniac in English:


1A person exhibiting extremely wild or violent behaviour: when he sits in front of a PlayStation he transforms into a karate-choppin' maniac
More example sentences
  • He is not a homicidal maniac, but a violent, evil man made even more so by his addiction to unnamed drugs.
  • I lost several pounds and I looked like a maniac.
  • The driver was screaming like a maniac at this stage.
1.1 [with adjective or noun modifier] informal An obsessive enthusiast: a religious maniac
More example sentences
  • 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.
  • 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.
1.2 Psychiatry , archaic A person suffering from mania.
lunatic, madman, madwoman, mad person, deranged person, psychopath, psychotic
Scottish informal radge
North American informal crazy, kook, meshuggener, nutso
US informal wing nut



Pronunciation: /məˈnʌɪək(ə)l/
Example sentences
  • And they didn't do so out of some maniacal drive to accumulate a big pile of cash.
  • He glared at me with his fishy-looking eyes and flashed me a maniacal grin, showing all his yellow teeth.
  • Despite its proven stress-relieving effect, I will not indulge in maniacal laughter.


Pronunciation: /məˈnʌɪək(ə)li/
Example sentences
  • The kitchen table is an unruly heap of evidence as Jordan, maniacally smoking, tells her sprawling story.
  • He ran around laughing maniacally when I told him to do things.
  • In the event that neither is true, feel free to laugh maniacally at me.


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

Words that rhyme with maniac

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

Definition of maniac in:

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