The meaning of MANIAC is someone who is or acts mentally unsound; especially : a person who behaves in a wildly foolish, reckless, or dangerous manner. How to use maniac in a sentence.

MANIAC definition: 1. a person who has a very strong interest in a particular activity: 2. a person who behaves in an…. Learn more.

If you describe someone's behaviour as maniac, you are emphasizing that it is extremely foolish and uncontrolled. 3 meanings: 1. a wild disorderly person 2. a person who has a great craving or enthusiasm for something 3. psychiatry obsolete.... Click for more definitions.

A maniac is a crazy person. Screaming like a maniac is never a good way to get your point across. Long ago, the word maniac was an official psychiatric term that meant "a patient suffering from mania," or manic disorder, involving a euphoric mood and extreme energy.

(informal, sometimes offensive) a person who behaves in a dangerous, violent or wild way and who you think is crazy or strange The use of the word maniac to refer to somebody who has a mental illness is offensive. synonym madman. He was driving like a maniac.

1. a form of mental illness in which the sufferer is over-active, over-excited, and unreasonably happy. 2. an unreasonable enthusiasm for something.

MANIAC meaning: 1 : someone who is violent and mentally ill; 2 : a person who behaves in a very wild way