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[fuh-nat-uh-sahyz-uh m] /fəˈnæt əˌsaɪz əm/
fanatical character, spirit, or conduct.
Origin of fanaticism
1705-15; fanatic + -ism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for fanaticism
Contemporary Examples
Historical Examples
  • Never had the new-comer seen a concourse so wrought upon by fanaticism; never had he seen a concourse so peculiarly constituted.

  • Georgiana, my dear, you are an abolitionist,—your talk is fanaticism!

    Clotelle William Wells Brown
  • Much may be laid to fanaticism, and the mental derangement which it either produced or evinced.

  • There is a wild interest which actuates the chamois-hunter, amounting to fanaticism.

    Foot-prints of Travel Maturin M. Ballou
  • We have already traced the destruction of the Cross at Banbury to the leaven of fanaticism.

British Dictionary definitions for fanaticism


wildly excessive or irrational devotion, dedication, or enthusiasm
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
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Word Origin and History for fanaticism

1650s, from fanatic + -ism.

Online Etymology Dictionary, © 2010 Douglas Harper
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