[ 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.

Origin of mendacity

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

Can be confused

mendacity 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 Forms

mendacious (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