motivated or characterized by an extreme, uncritical enthusiasm or zeal, as in religion or politics.

Also fanatic.

Origin of fanatical

First recorded in 1540–50; fanatic + -al1
Related formsfa·nat·i·cal·ly, adverbfa·nat·i·cal·ness, nounnon·fa·nat·i·cal, adjectivenon·fa·nat·i·cal·ly, adverbun·fa·nat·i·cal, adjectiveun·fa·nat·i·cal·ly, adverb

Synonyms for fanatical

Synonym study Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fanatical

Contemporary Examples of fanatical

Historical Examples of fanatical

British Dictionary definitions for fanatical



surpassing what is normal or accepted in enthusiasm for or belief in something; excessively or unusually dedicated or devoted
Derived Formsfanatically, adverb
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

Word Origin and History for fanatical

1540s, from fanatic + -al (1). Related: Fanatically.

Online Etymology Dictionary, © 2010 Douglas Harper