Dictionary.com

maniac

[ mey-nee-ak ]
/ ˈmeɪ niˌæk /
Save This Word!

noun

a raving or violently insane person; lunatic.
any intemperate or overly zealous or enthusiastic person: a maniac when it comes to details.

adjective

QUIZZES

QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
Question 1 of 7
The rainy weather could not ________ my elated spirits on my graduation day.

Origin of maniac

First recorded in 1595–1605, maniac is from the Medieval Latin word maniacus of, pertaining to madness. See mania, -ac
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for maniac

maniac
/ (ˈmeɪnɪˌæk) /

noun

a wild disorderly person
a person who has a great craving or enthusiasm for somethinga football maniac
psychiatry obsolete a person afflicted with mania
C17: from Late Latin maniacus belonging to madness, from Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for maniac

maniac
[ mānē-ăk′ ]

n.

An insane person.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Learning At Home Just Got Easier!