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[krej-uh-luh s] /ˈkrɛdʒ ə ləs/
willing to believe or trust too readily, especially without proper or adequate evidence; gullible.
marked by or arising from credulity:
a credulous rumor.
Origin of credulous
1570-80; < Latin crēdulus, equivalent to crēd(ere) to believe + -ulus adj. suffix denoting a quality or tendency; see -ous
Related forms
credulously, adverb
credulousness, noun
noncredulous, adjective
noncredulously, adverb
noncredulousness, noun
overcredulous, adjective
overcredulously, adverb
overcredulousness, noun
uncredulous, adjective
uncredulously, adverb
uncredulousness, noun
Can be confused
credible, credulous.
1. believing, trustful, unsuspecting. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for credulousness
Contemporary Examples
Historical Examples
  • Both are personifications founded in the ignorance of the masses, and their continuance will cease with their credulousness.

    A Few Words About the Devil Charles Bradlaugh
  • She herself meanwhile will seek to enter the kemenate and play upon her credulousness.

  • Antonia had the most trusting, responsive eyes in the world; love and credulousness seemed to look out of them with open faces.

    My Antonia Willa Cather
  • What first suggested to Crandon his idea of the love-potion was the discovery of Sophie's credulousness.

    Beggars on Horseback F. Tennyson Jesse
British Dictionary definitions for credulousness


tending to believe something on little evidence
arising from or characterized by credulity: credulous beliefs
Derived Forms
credulously, adverb
credulousness, noun
Word Origin
C16: from Latin crēdulus, from crēdere to believe
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 credulousness



1570s, from Latin credulus "that easily believes, trustful," from credere "to believe" (see credo). Related: Credulously; credulousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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