telling lies, especially habitually; dishonest; lying; untruthful: a mendacious person.
false or untrue: a mendacious report.
- men·da·cious·ly, adverb
- men·da·cious·ness, noun
- un·men·da·cious, adjective
- un·men·da·cious·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use mendacious in a sentence
Sadly, a significant number of House and Senate members appear dim and perhaps were led astray by more mendacious members.
"I won't hurt you, my little man," he added, with the affable mendaciousness of his craft.A Flat Iron for a Farthing | Juliana Horatia Ewing