Maniac definition

mānē-ăk
Frequency:
A person who acts in a wildly irresponsible way.

Maniacs on the highway.

noun
8
2
A person affected by a (specified) mania.

Kleptomaniac.

affix
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3
A wildly or violently insane person; madman; lunatic.
noun
6
2
Of, having, or showing mania; maniacal.
adjective
5
1
Affected by a (specified) mania.
affix
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A fanatic, a person with an obsession.
noun
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0
A psychotic or otherwise mentally ill person who exhibits violent or bizarre behavior. Not used in psychiatric diagnosis.
noun
2
2
(informal) A person who has an excessive or persistent enthusiasm, liking, or desire for something.

A football maniac.

noun
1
1
Maniac is defined as a person acting wild and violently, or a person who has an excessive liking for something.

An example of a maniac personality is a person who is violent for no reason; a maniac personality.

An example of a maniac golfer is someone who plays daily and would play multiple times per day if it was possible.

adjective
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0
The definition of a maniac is an uncontrollably violent person or someone who is overly interested or obsessed with something.

An example of a maniac is a person who is fighting with people in a bar for no reason and won't stop when asked.

An example of a maniac is a fan of the New York Giants who only wears the New York Giant team colors and has painted their house blue, red, gray and white.

noun
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An insane person, especially one who suffers from a mania.
noun
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A person who has an excessive enthusiasm or desire for something.

A sports maniac.

noun
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3

Other Word Forms

Noun

Singular:
maniac
Plural:
maniacs

Origin of maniac

  • From Late Latin maniacus maniacal from Greek maniakos from maniā madness men-1 in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Late Latin maniacus, from Ancient Greek μανιακός (maniakos), adjectival form of μανία (mania, “madness").

    From Wiktionary