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
They created well-intentioned rules—which most mendacious lobbyists have found a way to ignore legally.Former Lobbyist Jack Abramoff On Congressional Travel Disclosure | Jack Abramoff | July 4, 2014 | THE DAILY BEAST
Ross Douthat wrote in The New York Times that the media coverage of the bill was “mendacious” and “hysterical.”Are Opponents of Arizona's Anti-Gay Law Eager to Deceive? | Kirsten Powers | March 3, 2014 | THE DAILY BEAST
Why call his speech before the United Nations “defamatory and venomous… full of mendacious propaganda?”
Erdogan's description of Israeli behavior toward the Palestinians as "genocidal" is mendacious and inflammatory.
But too few Democrats—and almost no media commentators—have countered the mendacious right-wing storyline.
For the mendacious history confuses two entirely distinct persons—Eugenius and Eirenæus Philalethes.Devil-Worship in France | Arthur Edward Waite
True national dignity and glory lie in right doing, and humiliation comes only from public dishonour and a mendacious diplomacy.The Life of Mazzini | Bolton King
Splendidly mendacious in these pages as he was in life, Barras posed always as the man on horseback of his "13 Vendmiaire."The Stones of Paris in History and Letters, Volume I (of 2) | Benjamin Ellis Martin
The signification of the studies of antiquity hitherto pursued: obscure; mendacious.We Philologists, Volume 8 (of 18) | Friedrich Nietzsche
"My watch was twenty minutes fast, and I had given him up," said Brimmer, with mendacious effrontery.The Crusade of the Excelsior | Bret Harte