[ men-das-i-tee ]
/ mɛnˈdæs ɪ ti /

noun, plural men·dac·i·ties for 2.

the quality of being mendacious; untruthfulness; tendency to lie.
an instance of lying; falsehood.

Nearby words

  1. mend one's fences,
  2. mend one's ways,
  3. mendable,
  4. mendacious,
  5. mendaciously,
  6. mende,
  7. mendel,
  8. mendel's first law,
  9. mendel's law,
  10. mendel's laws

Origin of mendacity

1640–50; < Late Latin mendācitās falsehood, equivalent to Latin mendāci- (stem of mendāx) given to lying, false + -tās -ty2

Can be confusedmendacity mendicity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for mendacity

British Dictionary definitions for mendacity


/ (mɛnˈdæsɪtɪ) /

noun plural -ties

the tendency to be untruthful
a falsehood
Derived Formsmendacious (mɛnˈdeɪʃəs), adjectivemendaciously, adverbmendaciousness, noun

Word Origin for mendacity

C17: from Late Latin mendācitās, from Latin mendāx untruthful

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 mendacity



"tendency to lie," 1640s, from Middle French mendacité and directly from Late Latin mendacitas "falsehood, mendacity," from Latin mendax "lying; a liar" (see mendacious).

Online Etymology Dictionary, © 2010 Douglas Harper