PLAINTIFF - The Law Mind Legal Dictionary

PLAINTIFFAuthored

The Law Mind • 1208 words

Definition

The plaintiff is the party who initiates a civil lawsuit — the person or entity that files a complaint, states a grievance, and asks a court for relief. The plaintiff is named as such on the record and bears the initial burden of establishing that a claim exists and that the court has jurisdiction to hear it.

In a civil action, the plaintiff stands opposite the defendant. The plaintiff defines the scope of the lawsuit by framing the claims in the complaint, selecting the theory of recovery, and identifying the relief sought. A single action may have multiple plaintiffs (co-plaintiffs), and in class actions, a named plaintiff represents a broader class of similarly situated parties.

The term applies in civil proceedings. In criminal matters, the prosecuting sovereign — the state or federal government — brings the action, and the term "plaintiff" is generally not used; the complaining party is the prosecution or the people.

Common Language

Modern common usage (Wiktionary): A party bringing a suit in civil law against a defendant; accuser.

Historical common usage (Webster's 1913): One who commences a personal action or suit to obtain a remedy for an injury to his rights; opposed to defendant.

The common and legal meanings align closely here, but one gap is worth noting: ordinary usage sometimes treats "plaintiff" and "accuser" as interchangeable, importing a criminal connotation. In legal practice, "plaintiff" is a civil-law term. The accusing party in a criminal case is the prosecution, not a plaintiff. Researchers reading older lay sources should be alert to this slippage.

Common Confusion

PLAINTIFF vs. COMPLAINANT vs. PETITIONER: These terms describe the initiating party in different procedural contexts and are not fully interchangeable. "Plaintiff" is the standard term in civil actions at law. "Complainant" appears in equity proceedings, administrative hearings, and some criminal contexts (the person who lodges a complaint with authorities). "Petitioner" is used when relief is sought by petition rather than by complaint — common in appellate proceedings, habeas corpus, family law matters, and certain statutory proceedings. Historical sources frequently use all three terms in overlapping ways, and older equity practice used "complainant" where modern courts would say "plaintiff." When reading pre-merger sources (before the merger of law and equity under the Federal Rules), the distinction between plaintiff and complainant tracked a meaningful procedural divide.

Recognized Forms

/SUBTYPES

Plaintiff in Error: In pre-modern appellate practice, the party who brought a writ of error to challenge a judgment below. Functionally equivalent to the modern appellant, but the terminology reflects the older writ system. Black's (2nd Ed.) defines this explicitly. Researchers encountering "plaintiff in error" in historical records should understand they are reading about the losing party below who sought appellate review — not necessarily the party who originally initiated the lawsuit.

Use Plaintiff: A party for whose benefit an action is brought, where the action proceeds formally in the name of another. Recognized in Black's (2nd Ed.) and common in historical practice where the real party in interest could not sue directly in their own name. Modern procedure, particularly the real-party-in-interest rules, has largely eliminated the practical need for this device.

Named Plaintiff / Class Representative: In class action practice, the named plaintiff appears on the record and prosecutes the action on behalf of all class members. The named plaintiff must satisfy adequacy-of-representation requirements and, in federal court, the requirements of Rule 23.

Why It Matters in Research

For most research purposes, "plaintiff" is stable and unambiguous — but several navigational points matter.

First, the procedural merger trap. Before the Federal Rules of Civil Procedure (1938) merged law and equity in federal courts, and before equivalent state-level mergers, the party initiating suit in equity was called the "complainant," not the "plaintiff." Historical materials from equity courts will not use "plaintiff." Researchers working with pre-merger state records should know which court system they are in before assuming terminology is consistent.

Second, "plaintiff in error" in appellate records. A researcher reading 19th-century appellate opinions will frequently encounter "plaintiff in error" for the appellant. This label tells you who lost below and is seeking reversal — it does not tell you who originally brought the underlying suit. The original plaintiff may have been the defendant below and the plaintiff in error on appeal.

Third, plaintiff-specific legal doctrines carry their own research threads. The eggshell plaintiff rule (defendant takes the plaintiff as they find them), the unclean hands defense (barring equitable relief to a plaintiff who acted inequitably), and the distinction between public and private plaintiffs in defamation law each require separate research lines. The encyclopedia entries linked above are starting points for each.

Fourth, standing doctrine. In constitutional litigation and administrative law, who qualifies as a proper plaintiff is a threshold question governed by standing requirements — injury in fact, causation, redressability — that go well beyond the procedural definition. "Plaintiff" in a constitutional context carries substantive freight that the dictionary definition alone does not capture.

Historical Dictionary Support

Black's Law Dictionary (both editions) offers a compact, consistent definition: the plaintiff is the party who complains or sues in a personal action and is so named on the record. The second edition adds the useful subtypes of plaintiff in error and use plaintiff, which reflect procedural devices that were live in practice when that edition was compiled.

Burrill's Law Dictionary provides the most textured historical account, tracing the term to the Law French "pleyntyfe" and the Latin "querens" (the complaining party), and noting that the word is the old French term with modernized spelling. Burrill also references the Bank of Salina v. Henry decision for the proposition that "plaintiff" carries meaning in both legal and ordinary usage — a rare instance of courts explicitly bridging the lay and legal senses of a foundational term.

Anderson's Dictionary of Law entry retrieved under this term addresses venue and place of indictment rather than plaintiff directly, suggesting an indexing artifact. Researchers should not treat that content as substantively relevant to this term.

The historical dictionaries collectively treat "plaintiff" as settled and uncontroversial — which is largely accurate. Their silence on standing, class actions, and the equity/law distinction reflects the procedural world of their era rather than any deficiency in their definitions.

Jurisdictional Note

The term is functionally uniform across U.S. jurisdictions in civil practice. Variation appears at the margins: some states retain "complainant" in family law, probate, or equity-derived proceedings; others have fully standardized "plaintiff" across all civil matters. Researchers working in Louisiana should note the civilian tradition, which may use terminology with different historical roots even where modern practice has converged.

PLAINTIFFmain

Black's Law Dictionary • 1891

A person who brings an action; the party who complains or sues in a personal action and is so named on the rec- ord.

PLAINTIFFmain

Black's Law Dictionary (2nd Ed.) • 1910

A person who brings an action; the party Who complains or sues in a personal action and is so named on the record. Gulf, etc, R. Co. v. Scott (Tex. Civ. App.) 28 8. W. 458; Canaan v. Greenwoods Turnpike Co., 1 Conn. 1. —Plaintiff in error. The party out a writ of error to review a judgment’ or other procceu og at law.—jUse plaintiff. One for whose use (benefit) an action is brought in the name of another. Thus, where the assignee of a chose in action is not allowed to sue in his own name, the action would be entitled “A. B. (the assignor) for the use of C. JD. the assignee) against EB. F.” In this case, . D. is called the “use plaintiff.”

PLAINTIFFmain

Anderson's Dictionary of Law • 1890

Place of indictment. In general, all offenses must be inquired into and tried in the county where the fact is committed. Yet, if larceny is committed in one county, and the goods are carried into another, the offender may be tried in either, for the offense is complete in both. But for robbery, burglary, and the like, he can only be indicted where the fact was actually committed; for though the carrying away and the keeping of the goods is a continuance of the original taking, and is therefore larceny in the second county, yet it is not robbery or burglary in that jurisdiction.1 The crime of murder is complete where the felonious blow was struck, notwithstanding that the death happens within another jurisdiction. In the Federal courts, capital offenses are indictable in the jurisdiction where the offense was committed, when that can be done without great inconvenience; offenses committed on the high seas, or elsewhere out of the jurisdiction of a State or district, in the district where the offender is found, or into which he is first brought. An offense begun in one circuit and completed in another is deemed committed in either and may be tried in either. Suits for taxes, penalties, and forfeitures may be begun in the district where they accrue or in which the offender or delinquent is found. Seizures, made upon the high seas, where the property is brought; made within any district, in that district, unless otherwise provided. See DESCRIPTION, 4; INDICTMENT; VENUE. Place of payment. When no place of payment is expressed in a bill or note, the rule, in the absence of any agreement or circumstances fixing or indicating a different intention, is that the place of presentment is the place where the acceptor or maker resides, or at their usual place of business. See BUSINESS; PRESENT, 2 (1). 2. To negotiate, or contract, for a thing: as, to place a risk, a mortgage, or other loan; also, to deliver a thing to a person for a purpose. A person who "places" his goods with an agent for a specified purpose does not necessarily authorize him to make a warranty.& Parties to a contract for "placing" mortgages may mean selling or realizing upon them." 2. A subdivision of an abridgment or digest. Abbreviated pl. Originally, one who makes plaint, q. v. The party in whose favor the plaint or suit purports, on the record, to have been instituted.5 One who complains of injury done, in court.6 Whoever brings a suit, bill, or complaint, is a "party plaintiff," and whoever is bound to appear and defend is the party defendant, q. v. In common-law proceedings we speak of the actor (the party bringing suit) as "plaintiff," and in equity proceedings as "complainant," a distinction without a difference. The terms are convertible, although, for the purpose of distinguishing whether the suit is at law or in equity, the different names are sometimes used. In the equity rules of the Supreme Court, the actor is always called plaintiff. 8 Legal plaintiff. He in whom the legal title or cause of action is vested. Equitable plaintiff. He who in equity is entitled to the thing sued for. Nominal plaintiff. One who is named as plaintiff, but yet has no interest in the controversy, having assigned his right to

PLAINTIFFn.

Websters Unabridged Dictionary (1913) • 1913

One who commences a personal action or suit to obtain a remedy for an injury to his rights; -- opposed to Ant: defendant.

PLAINTIFFa.

Websters Unabridged Dictionary (1913) • 1913

See Plaintive. [Obs.] Prior.

plaintiffnoun

Wiktionary (English) • 2026

Wiktionary contributors • CC BY-SA 4.0 • via Kaikki
Extracted and formatted for display by Law Mind. Source link opens the current Wiktionary page and its contributor history; it is not a frozen copy of this extract.

A party bringing a suit in civil law against a defendant; accuser.

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