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[ir-i-lij-uh n]
See more synonyms for irreligion on Thesaurus.com
  1. lack of religion.
  2. hostility or indifference to religion; impiety.
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Origin of irreligion

First recorded in 1585–95, irreligion is from the Latin word irreligiōn- (stem of irreligiō). See ir-2, religion
Related formsir·re·li·gion·ist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for irreligion

Historical Examples

  • Yet the irreligion of the West was painted darker than it really was.

    Union and Democracy

    Allen Johnson

  • Yet let no one think that irreligion is advocated in this book.


    George Borrow

  • Something was said, too, that I could not catch, about her irreligion.

  • We have, that is to say, been swayed by the spirit of irreligion rather than of religion.

  • To his violences of temper he added a reputation for irreligion.

British Dictionary definitions for irreligion


  1. lack of religious faith
  2. indifference or opposition to religion
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Derived Formsirreligionist, noun
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 irreligion


1590s, from Late Latin irreligionem (nominative irreligio) "irreligion, impiety," from assimiliated form of in- "not" (see in- (1)) + religio (see religion).

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Online Etymology Dictionary, © 2010 Douglas Harper