Definition of perjure in English:

perjure

verb

perjure oneself
Law
  • Willfully tell an untruth when giving evidence to a court; commit perjury.

    • ‘Once unmasked, he admitted he had perjured himself.’
    • ‘In other words, he lied, or perjured himself through giving inaccurate information about his assets.’
    • ‘Three judges found that the detectives repeatedly lied under oath and the court found that they had perjured themselves.’
    • ‘The proposition assumes that the witness is going to perjure himself or herself.’
    • ‘If they perjure themselves they can go to jail and forfeit all retirement pay and allowances.’
    lie under oath, lie, commit perjury, give false evidence, give false testimony, forswear oneself, be forsworn, bear false testimony, bear false witness, swear falsely
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Origin

Late Middle English (as perjured in the sense guilty of perjury): from Old French parjurer, from Latin perjurare swear falsely from per- to ill effect + jurare swear.

Pronunciation:

perjure

/ˈpərjər/