• synonyms


[fuh-nat-uh-sahyz-uh m]
See more synonyms for fanaticism on Thesaurus.com
  1. fanatical character, spirit, or conduct.
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Origin of fanaticism

First recorded in 1705–15; fanatic + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for fanaticism

Contemporary Examples

Historical Examples

  • But how pull the scales from off eyes blinded by fanaticism?

    A Nest of Spies

    Pierre Souvestre

  • He could not combat the fanaticism that was Sir Richard's in this matter.

    The Lion's Skin

    Rafael Sabatini

  • The Catholics were stimulated by all the energies of fanaticism in defense of the Church.

  • The fanaticism of yesterday is the reform of to-day, and the victory of to-morrow.

  • Freed from his fanaticism, his fascination, she will be as dangerous as a baby.

    The Genius

    Margaret Horton Potter

British Dictionary definitions for fanaticism


  1. wildly excessive or irrational devotion, dedication, or enthusiasm
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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 fanaticism


1650s, from fanatic + -ism.

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Online Etymology Dictionary, © 2010 Douglas Harper