the willful giving of false testimony under oath or affirmation, before a competent tribunal, upon a point material to a legal inquiry.
Origin: 1250–1300; Middle English perjurie < Anglo-French < Latin perjūrium, equivalent to perjūr(us) swearing falsely (see perjure) + -ium-ium; replacing parjure < Old French < Latin as above
criminal law the offence committed by a witness in judicial proceedings who, having been lawfully sworn or having affirmed, wilfully gives false evidence
[C14: from Anglo-French parjurie, from Latin perjūrium a false oath; see perjure]