noun, plural men·dac·i·ties for 2. 1.the quality of being
mendacious; untruthfulness; tendency to lie.
2.an instance of lying; falsehood.
Origin: 1640–50; <
Late Latin mendācitās falsehood, equivalent to
Latin mendāci- (stem of
mendāx) given to lying, false +
-tās -ty2 Synonyms
1, 2. deception, lie, untruth, deceit.