plaintiff

noun

plain·​tiff ˈplān-təf How to pronounce plaintiff (audio)
: a person who brings a legal action compare defendant

Did you know?

We won't complain about the origins of plaintiff, although complain and plaintiff are distantly related; both can be traced back to plangere, a Latin word meaning "to strike, beat one's breast, or lament." Plaintiff comes most immediately from Middle English plaintif, itself an Anglo-French borrowing tracing back to plaint, meaning "lamentation." (The English word plaintive is also related.) Logically enough, plaintiff applies to the one who does the complaining in a legal case.

Examples of plaintiff in a Sentence

the judge ruled that the plaintiff's lawsuit was groundless, and he dismissed it
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Five homeless people in Grants Pass were among the plaintiffs. Landon Mion, FOXNews.com, 30 Mar. 2025 This usually results in a judge entering a default judgment for damages in favor of the plaintiffs. Alex Riggins, San Diego Union-Tribune, 30 Mar. 2025 Coming after a trial with one of the plaintiffs, Pamela Knobbe of Gurnee, ended in a mistrial in Cook County Circuit Court, the case was resolved, according to a news release from STERIS, court filings with the First District Illinois Appellate Court in Chicago, and the SEC filing. Steve Sadin, Chicago Tribune, 29 Mar. 2025 The plaintiffs in that case have since filed three motions for contempt of court against the city for allegedly violating court orders in failing to fix the problems. Graham Rayman, New York Daily News, 29 Mar. 2025 See All Example Sentences for plaintiff

Word History

Etymology

Middle English plaintif, from Anglo-French, from pleintif, adjective

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of plaintiff was in the 14th century

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Cite this Entry

“Plaintiff.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plaintiff. Accessed 17 Apr. 2025.

Kids Definition

plaintiff

noun
plain·​tiff ˈplānt-əf How to pronounce plaintiff (audio)
: the complaining party in a lawsuit

Legal Definition

plaintiff

noun
plain·​tiff ˈplān-təf How to pronounce plaintiff (audio)
: the party who institutes a legal action or claim (as a counterclaim) see also complainant, complaint, libellant compare defendant, prosecution
Etymology

Middle French plaintif, from plaintif, adj., grieving, from plaint lamentation, from Latin planctus, from plangere to strike, beat one's breast, lament

More from Merriam-Webster on plaintiff

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