- The definition of mendacity is untruthfulness or a lie.
A lie from a person prone to lie is an example of mendacity.
- the quality or state of being mendacious
- a lie; falsehood
Origin: LL mendacitas from Classical Latin mendax
Used by arrangement with John Wiley & Sons, Inc.
noun pl. men·dac·i·ties
- The condition of being mendacious; untruthfulness.
- A lie; a falsehood.