A plaintiff is the party who starts a civil case by bringing a claim and asking the court for relief.
Plaintiff means the party who starts a civil case by filing claims and asking the court for relief.
Plaintiff is one of the first role labels a reader meets in a lawsuit. Knowing who the plaintiff is helps the reader understand who is making the allegations, who bears the burden of proving the claim, and who is asking for a remedy.
The term matters because people sometimes use it as a synonym for victim or truth-teller. In law, plaintiff is procedural. It identifies the party bringing the civil claim, not the side that automatically wins.
The term appears in complaints, captions, motions, discovery, settlement papers, trial documents, and appeals. It also matters in procedural rules because some obligations or burdens are framed in terms of the plaintiff’s role.
A consumer files a lawsuit against a company for alleged deceptive advertising. The consumer is the plaintiff because that party started the civil case and requested relief.
A plaintiff is different from a defendant, who is the party responding to the claim. A plaintiff is also different from a prosecutor in criminal law. Prosecutors bring criminal charges on behalf of the government, while plaintiffs bring civil claims.