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noun

plaintiff

/ˈpleɪntɪf/  ·  say it: PLAYN·tif

the person who brings a case against another in court

In Law & Justice

In more detail

1. (noun) a person who brings a legal case against another person in court

2. (noun) a person who makes a formal complaint

Examples

How to use plaintiff

Plaintiff is a formal legal term for someone who initiates a civil lawsuit, as opposed to a defendant who is sued. While it can also mean someone making a formal complaint more broadly, this usage is less common in modern English. It is distinctly different from criminal prosecution, where the state acts as the accuser rather than a private plaintiff.

Register: formal

Common phrases

Synonyms

complainant · claimant · accuser · petitioner

Opposites

defendant · respondent

Word family

plaintive (adjective) · plaintiff (noun)

A common mistake

Learners sometimes confuse plaintiff with plaintive (meaning sad or mournful), which has a different etymology despite their similar spelling. Plaintiff and defendant are also confused in direction—the plaintiff brings the case against the defendant, not vice versa.

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