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 fanatically

Contemporary Examples of fanatically

Historical Examples of fanatically

  • I am not speaking of that; Miss Amy Trefusis might be said to be fanatically conceited.


    Hugh Walpole

  • The Bhutanese are badly armed; but they are fanatically brave.

    The Elephant God

    Gordon Casserly

  • The peasantry are, everywhere, fanatically hostile to foreigners.

  • He belonged to a class of holy men, fanatically pious, rigidly observant of the law, and miserably and abjectly poor.

    The Apostles

    Ernest Renan

  • Said a country vicar to a fanatically scrupulous devotee: "God is not so silly as that."

British Dictionary definitions for fanatically



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 fanatically



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

Online Etymology Dictionary, © 2010 Douglas Harper