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mendacity

American  
[men-das-i-tee] / mɛnˈdæs ɪ ti /

noun

plural

mendacities

  1. the quality of being mendacious; untruthfulness; tendency to lie.

    Synonyms:
    deceit, untruth, lie, deception

  2. an instance of lying; falsehood.

    Synonyms:
    deceit, untruth, lie, deception
mendacity British  
/ mɛnˈdeɪʃəs, mɛnˈdæsɪtɪ /

noun

  1. the tendency to be untruthful

  2. a falsehood

"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

Other Word Forms

  • mendacious adjective
  • mendaciously adverb
  • mendaciousness noun

Etymology

Origin of mendacity

1640–50; < Late Latin mendācitās falsehood, equivalent to Latin mendāci- (stem of mendāx ) given to lying, false + -tās -ty 2

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.