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

At trial Dever accused Jackson of threatening to indict her for perjury. —Howie Carr, Boston Herald, 13 Sep. 2025

The charges include several counts of forgery of name, using another person's identity, perjury and grand theft of personal property. —Samira Asma-Sadeque, People.com, 11 Sep. 2025

Laura Lee Yourex, 62, of Costa Mesa, was charged with five felonies, including perjury, procuring or offering a false or forged document to be filed, casting a ballot when not entitled to vote and registering a non-existent person to vote. —Riley Hoffman, ABC News, 10 Sep. 2025

Von Ferdinand is charged with nearly three dozen counts, including forgery, identity theft and grand theft, while Alto faces eight counts, including perjury, forgery and identity theft. —City News Service, San Diego Union-Tribune, 10 Sep. 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