maniac

play
noun ma·ni·ac \ˈmā-nē-ˌak\

Definition of maniac

  1. 1 :  madman, lunatic

  2. 2 :  a person characterized by an inordinate or ungovernable enthusiasm for something

Examples of maniac in a Sentence

  1. He's a complete maniac when he's playing football.

  2. they should permanently put away the maniac who is responsible for these kidnappings

Recent Examples of maniac from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'maniac'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of maniac

Late Latin maniacus maniacal, from Greek maniakos, from mania


First Known Use: circa 1763



MANIAC Defined for English Language Learners

maniac

play
noun

Definition of maniac for English Language Learners

  • : someone who is violent and mentally ill

  • : a person who behaves in a very wild way

  • : a person who is extremely enthusiastic about something


MANIAC Defined for Kids

maniac

play
noun ma·ni·ac \ˈmā-nē-ˌak\

Definition of maniac for Students

  1. 1 :  a person who is or behaves as if insane

  2. 2 :  a person who is extremely enthusiastic about something



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