maniac

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

(adjective)

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.

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

(noun)

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.

See maniac in Webster's New World College Dictionary

adjective

of, having, or showing mania; maniacal

Origin: ML maniacus

noun

a wildly or violently insane person; madman; lunatic
a person who has an excessive or persistent enthusiasm, liking, or desire for something: a football maniac

See maniac in American Heritage Dictionary 4

noun

An insane person.
A person who has an excessive enthusiasm or desire for something: a sports maniac.
A person who acts in a wildly irresponsible way: maniacs on the highway.

adjective

Variant of maniacal.

Origin:

Origin: From Late Latin maniacus, maniacal

Origin: , from Greek maniakos

Origin: , from maniā, madness; see men-¹ in Indo-European roots

Learn more about maniac

maniac synonyms

maniac medical definition

maniac in a sentence

link/cite print suggestion box