Plaintiff
noun /ˈpleɪntɪf/ — The party who brings a case to court.
Definition
A person who brings a case against another in a court of law — the party who initiates a civil lawsuit, asserting that they have been wronged by the defendant.
Beyond the definition
To be the plaintiff is to make the accusation formal — to move from private grievance to public legal claim. The step requires a certain courage: submitting yourself to scrutiny, inviting counter-argument, accepting that the public record will include your name.
Origin & history
From Old French plaintif (complaining), from plaindre (to complain), from Latin plangere (to strike, bewail). The complaining party — one who brings a formal complaint before the court.
Example sentences
Illustrative sentences for learning, not verified community posts or sourced quotations.
The plaintiff argued that the defendant had breached a clear contractual obligation.
Being the plaintiff is not the same as being right — it simply means you started the process.
The plaintiff's costs mounted as the case dragged through its fourth year.
How to use it
This entry uses a noun. Follow the examples for articles and singular or plural forms; not every noun takes “a” or “an.”
Choose “Plaintiff” when the meaning fits your context: A person who brings a case against another in a court of law — the party who initiates a civil lawsuit, asserting that they have been wronged by the defendant.
Synonyms
claimant, petitioner, complainant
Antonyms
Related words
Plaintiff vs prosecutor
A plaintiff initiates a civil lawsuit seeking damages. A prosecutor represents the government in criminal cases to bring charges against an individual.
Word in the Wild
See how this word appears in life, language and stories.
Illustrative sentences and imagined stories for learning — not verified sightings, interviews, or sourced quotations.
Fictional scene
Heated Argument at Table

Two adults have a heated disagreement at a table, one using angry gestures while the other raises a hand.
The individual raising their hand to pause or object acts as a plaintiff in this conceptual dispute. They are initiating the confrontation, asserting that they have been wronged in a way that requires a response or formal resolution.
Image credit: Wordspun · AI-generated conceptual illustration
Questions about this word
What does "Plaintiff" mean?
Plaintiff is noun meaning: The party who brings a case to court.. A person who brings a case against another in a court of law — the party who initiates a civil lawsuit, asserting that they have been wronged by the defendant.
Where does the word "Plaintiff" come from?
From Old French plaintif (complaining), from plaindre (to complain), from Latin plangere (to strike, bewail). The complaining party — one who brings a formal complaint before the court.