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[in-krej-uh-luh s] /ɪnˈkrɛdʒ ə ləs/
not credulous; disinclined or indisposed to believe; skeptical.
indicating or showing unbelief:
an incredulous smile.
Origin of incredulous
From the Latin word incrēdulus, dating back to 1525-35. See in-3, credulous
Related forms
incredulously, adverb
incredulousness, noun
Can be confused
incredible, incredulous.
Synonym Study
See doubtful. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for incredulousness
Historical Examples
  • The prevailing trait in their mental attitude is incredulousness.

    Ireland as It Is Robert John Buckley (AKA R.J.B.)
  • She fed her incredulousness indignantly on the evidence confounding it.

  • I cried, with an incredulousness that I immediately perceived was rude.

  • She tried to meet the drawn misery and incredulousness of his face with a laugh of reassurance.

    The Portion of Labor Mary E. Wilkins Freeman
  • incredulousness was written on the quiet face that looked up at him from the armchair.

    A Black Adonis

    Linn Boyd Porter
  • He hoped she would laugh it away, but she only looked at him, her lips parted, a hint of incredulousness in her eyes.

    Spring Street James H. Richardson
  • But she was there, looking at him as she had when he told her she was beautiful, the same hint of incredulousness in her eyes.

    Spring Street James H. Richardson
  • Then he had hurriedly scrawled the check, which she took in spite of her incredulousness of its worth.

    The Debtor Mary E. Wilkins Freeman
British Dictionary definitions for incredulousness


(often foll by of) not prepared or willing to believe (something); unbelieving
Derived Forms
incredulously, adverb
incredulousness, 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
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Word Origin and History for incredulousness



"unbelieving," 1570s, from Latin incredulus "unbelieving, incredulous," from in- "not" (see in- (1)) + credulus (see credulous). Formerly also of religious beliefs. Related: Incredulously; incredulousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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