- 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.
- 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.
maniac definition by Webster's New World
of, having, or showing mania; maniacal
Origin: Midieval Latin maniacus
- 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
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- a person affected by a (specified) mania: kleptomaniac
- affected by a (specified) mania
maniac definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- 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.
Variant of maniacal.
Origin: From Late Latin maniacus, maniacal, from Greek maniakos, from maniā, madness; see men-1 in Indo-European roots.
maniac - Medical Definition
An insane person.