to render (oneself) guilty of swearing falsely or of willfully making a false statement under oath or solemn affirmation: The witness perjured herself when she denied knowing the defendant.
Origin: 1475–85; < L perjūrāre to swear falsely, equiv. to per- through, i.e., beyond the limits (see per-) + jūrāre to swear, lit., to be at law, deriv. of jūsjus
per·jure (pûr'jər) tr.v.
per·jured, per·jur·ing, per·juresLaw To make (oneself) guilty of perjury by deliberately testifying falsely under oath.
[Middle English perjuren, from Old French perjurer, from Latin periūrāre : per-, per- + iūrāre, to swear; see yewes- in Indo-European roots.] per'jur·er n.