[ fuh-nat-i-kuhl ]
See synonyms for fanatical on
  1. motivated or characterized by an extreme, uncritical enthusiasm or zeal, as in religion or politics.

Origin of fanatical

First recorded in 1540–50; fanatic + -al1

synonym study For fanatical

Other words for fanatical

Other words from fanatical

  • fa·nat·i·cal·ly, adverb
  • fa·nat·i·cal·ness, noun
  • non·fa·nat·i·cal, adjective
  • non·fa·nat·i·cal·ly, adverb
  • un·fa·nat·i·cal, adjective
  • un·fa·nat·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use fanatical in a sentence

  • But there is at the very least a strong minority fanatically opposed to a repeal of the policy.

    The Real McChrystal Story | Leslie H. Gelb | June 22, 2010 | THE DAILY BEAST
  • The poor like the Queen personally, and like to gaze at royal pageantry; but they are not fanatically loyal.

    Glances at Europe | Horace Greeley
  • He was attached fanatically to Napoleon, who could appreciate him, and who made him chief of division in 1804.

    Repertory Of The Comedie Humaine, Complete, A -- Z | Anatole Cerfberr and Jules Franois Christophe
  • Bierce was the cleanest man, personally, of whom I have knowledge—almost fanatically so, if such a thing be possible.

  • The hero meets a princess in a far-away island among fanatically hostile Musselmen.

    The Eternal City | Hall Caine
  • Nayland is a stuffed shirt of the first stuffing, and a tinpot Hitler to boot, but he is fanatically and incorruptibly patriotic.

    The Mercenaries | Henry Beam Piper

British Dictionary definitions for fanatical


/ (fəˈnætɪkəl) /

  1. surpassing what is normal or accepted in enthusiasm for or belief in something; excessively or unusually dedicated or devoted

Derived forms of fanatical

  • fanatically, 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