perjury

noun

per·​ju·​ry ˈpər-jə-rē 

ˈpərj-rē

: the voluntary violation of an oath or vow either by swearing to what is untrue or by omission to do what has been promised under oath : false swearing

Did you know?

The prefix per- in Latin often meant "harmfully". So witnesses who perjure themselves do harm to the truth by knowingly telling a lie. Not all lying is perjury, only lying under oath; so perjury generally takes place either in court or before a legislative body such as Congress. To avoid committing perjury, a witness or defendant may "take the Fifth": that is, refuse to answer a question because the answer might be an admission of guilt, and the Fifth Amendment to the Constitution forbids forcing a citizen to admit to being guilty of a crime.

Examples of perjury in a Sentence

He was found guilty of perjury.

Recent Examples on the Web

Hill, who oversaw jury management and courtroom logistics during Murdaugh's 2023 murder trial, pleaded guilty Monday to perjury, obstruction of justice and misconduct in office. —Sarah Rumpf-Whitten, FOXNews.com, 9 Dec. 2025

Hill, 57, also faced a misdemeanor charge of perjury in Richland County, the South Carolina Law Enforcement Division said in a news release after her arrest earlier this year. —CBS News, 8 Dec. 2025

The current requirement includes attesting on the form, under penalty of perjury, that the applicant is an American citizen. —Ramsey Touchberry, The Washington Examiner, 18 Nov. 2025

Kansas treats election perjury and voter fraud as non-person felonies, with potential jail time of five years. —Peter Aitken, MSNBC Newsweek, 15 Nov. 2025

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for perjury

• surgery
• cryosurgery
• microsurgery
• neurosurgery
• psychosurgery
• radiosurgery

Kids Definition

perjury

noun

per·​ju·​ry ˈpərj-(ə-)rē 

plural perjuries

: the act or crime of swearing to what one knows is untrue

Legal Definition

perjury

noun

per·​ju·​ry ˈpər-jə-rē 

plural perjuries

: the act or crime of knowingly making a false statement (as about a material matter) while under oath or bound by an affirmation or other officially prescribed declaration that what one says, writes, or claims is true compare false swearing

Etymology

Anglo-French perjurie, parjurie, from Latin perjurium, from perjurus deliberately giving false testimony, from per- detrimental to + jur-, jus law