/men das"i tee/ , n. , pl. mendacities for 2.
1. the quality of being mendacious; untruthfulness; tendency to lie.
2. an instance of lying; falsehood.
[ 1640-50; mendacitas falsehood, equiv. to L mendaci- (s. of mendax ) given to lying, false + -tas -TY 2 ]
Syn. 1, 2. deception, lie, untruth, deceit.