Men-dăc'ĭ-ty, n.
(men-dăs'ĭ-tē), n. [Lat. mendacitas, It. & Sp. mendacia.]
Sense 1. The quality of being mendacious; a disposition to deceive; a habit of lying; falsehood.
His mendacity and his effrontery passed into proverbs. Macaulay.
Sense 2. A falsehood; a lie.
Synonyms—Lying; deceit; untruth.