Definition of mendacious in English:



  • Not telling the truth; lying.

    ‘mendacious propaganda’
    • ‘Another strand recounts the author's debilitating experiences with the music industry in all its mendacious vainglory.’
    • ‘It is an outright lie, a fabrication by a mendacious and unscrupulous writer.’
    • ‘The film is more than unusual in its attempt to connect society's dysfunction and popular misery with the actions of a hypocritical, mendacious ruling elite.’
    • ‘It is because the argument has been had and they have comprehensively lost it - because every one of their arguments is either bogus, mendacious or plain demonstrably wrong.’
    • ‘Instead, the justifications offered for the restrictions contained in the amendment to the act have been either disingenuous or simply mendacious.’
    • ‘The common treatment of the monopoly question is thoroughly mendacious and dishonest.’
    • ‘It is quite possible that his only truly shameful act was his abandonment of his daughter and her mother, not to mention his mendacious behaviour toward my mother.’
    • ‘He has lied about his school and college results and his credit cards have more bounce than Beyoncé, so this mendacious chap needs to mend his ways.’
    • ‘He wanted me to know the sort of country I was living in and what was going on around me, in defiance of the chronically mendacious official propaganda.’
    • ‘Still, the nagging sense (given the mendacious way the plan/nonplan is being sold) is that people will be compelled to choose to be risk takers.’
    • ‘And despite the fact that I've been almost exclusively mendacious since my late teens, it's not rained on me once.’
    • ‘He's mendacious and obnoxious, so what accounts for his appeal?’
    • ‘By the end - though of course they are much too polite to say so - I can see they are thinking that I must be either completely senile or completely mendacious.’
    • ‘If the emphasis does not change, moving away from the meaningless and mendacious form-filling of the current regime, the wool will continue to be pulled over the eyes of the public and the regulator.’
    • ‘Overall, Wittenberg portrays him as a petty, hypocritical, mendacious man whose primary focus was self-promotion.’
    • ‘It makes me think we are dealing with a vain mendacious man who clung to power as long as he possibly could wrapped in a cloud of vainglory and falsehood, when he should have had the good grace to go quietly long ago.’
    • ‘But it's no more mendacious than a bunch of other tendentious uses of statistics that are the common coin of political debate today.’
    • ‘That promise has been revealed as mendacious nonsense.’
    • ‘Though one imagines that successful players must be mean, damaged and mendacious, he turned out to be a thoroughly charming and friendly bear of a man.’
    • ‘Here it is… equally malodorous, mendacious, but it's up there on the Web for all to see, truth is stranger than fiction.’
    lying, untruthful, dishonest, deceitful, false, dissembling, insincere, disingenuous, hypocritical, fraudulent, double-dealing, two-faced, janus-faced, two-timing, duplicitous, perjured, perfidious
    View synonyms


Early 17th century: from Latin mendax, mendac- ‘lying’ (related to mendum ‘fault’) + -ious.