perjure UK /ˈpɜːd͡ʒə(ɹ)/US /ˈpɝd͡ʒɚ/verb 3noun 1forms 5 verb3 •[with oneself] To knowingly and willfully make a false statement of witness while in court.He perjured himself. •To cause to violate an oath or a vow; to cause to make oath knowingly to what is untrue; to make guilty of perjury; to forswear; to corrupt.Want will perjure the ne'er-touched vestal. — 1606 •To make a false oath to; to deceive by oaths and protestations.And with a virgin innocence did pray / For me, that perjured her. — 1608 noun1 •(no longer used) A perjured person.He comes in like a perjure, wearing papers — 1595 formsperjured · perjuring · perjures · perjureth · perjurest