Definition
A formal assertion made by a party to a legal proceeding, setting out what that party claims to be true and undertakes to prove. Allegations appear in pleadings, affidavits, indictments, and similar instruments. They are not established facts — they are the propositions a party puts forward as the basis for a claim or defense, subject to proof or rebuttal.
Two distinctions matter most in practice:
1. Material allegation: An averment essential to the claim or defense — one that cannot be removed from the pleading without leaving it legally insufficient. In modern civil procedure, identifying which allegations are material determines what must be admitted, denied, or affirmatively answered.
2. Immaterial allegation: An averment that does not go to the substance of the claim. Courts may disregard it, and opposing parties need not respond to it. In some jurisdictions, courts may strike immaterial allegations on motion.
Common Language
Modern common usage (Wiktionary): An assertion, especially an accusation, not necessarily based on facts; the act of alleging.
Historical common usage (Webster's 1913): A statement by a party of what he undertakes to prove; positive assertion; formal averment.
In ordinary language, "allegation" carries a strong connotation of unproven accusation — the word implies doubt or suspicion about the truth of what is claimed. Legal usage is narrower and more neutral: an allegation is simply a party's formal statement of a fact it asserts and will attempt to prove, with no inherent implication that the claim is false or even unlikely. A researcher reading historical pleadings or ecclesiastical proceedings should treat allegations as structural components of argument, not as accusations in the modern journalistic sense.
Common Confusion
Allegation is frequently conflated with averment and with charge. Averment is the act of formal affirmation — the mechanism — while allegation refers to the content of what is asserted. Charge carries a more specific meaning in criminal law, referring to the formal accusation lodged by a grand jury indictment or information. An indictment contains charges; each charge is expressed through allegations. In ecclesiastical procedure, the historical sources use allegation in a still-broader sense, covering both the libel (the plaintiff's pleading) and the defensive allegation (the defendant's responsive statement of new facts), which has no direct modern equivalent.
Recognized Forms
/SUBTYPES
Material allegation: An averment essential to the legal sufficiency of the pleading.
Immaterial allegation: An averment that adds nothing necessary to the claim or defense; subject to being disregarded or stricken.
Defensive allegation: In English ecclesiastical practice, the defendant's response setting forth new facts in support of a defense — distinct from a simple denial.
Negative allegation: An assertion framed in the negative; historically relevant to questions of pleading burden, since a party asserting a negative averment might bear a reduced or shifted burden of proof.
Why It Matters in Research
The word allegation is ubiquitous in legal sources, which makes it easy to overlook how its function shifts across procedural contexts. Several research traps are worth flagging:
Ecclesiastical versus common law usage: Historical English sources, particularly those dealing with ecclesiastical courts, use allegation as a broad term for pleading instruments — including what common law would call a declaration or plea. Burrill and Bouvier both document this usage. Reading ecclesiastical records without this context will produce confusion about what stage of proceedings a document represents.
Modern pleading versus historical pleading: Under common law pleading rules, each allegation carried technical weight — courts evaluated whether each averment was material, traversable, or surplusage. Under modern notice pleading (post-1938 in federal practice, and adopted in varying forms by most states), the legal threshold for adequate allegations changed significantly. Research comparing pre- and post-code-pleading cases must account for this shift; "sufficient allegation" meant very different things before and after procedural reform.
Allegation versus proof: Historical sources are sometimes imprecise about the line between what was alleged and what was established. In reading older case reports or pleading records, researchers should confirm whether a stated "fact" appears as an allegation in the pleadings or as a finding of the court.
Corpus navigation: In Law Mind sources, allegation appears constantly in materials on civil procedure, criminal procedure, evidence (particularly regarding burden of proof), and ecclesiastical law. The material/immaterial distinction connects directly to research on demurrers, motions to strike, and the development of fact pleading standards.
Historical Dictionary Support
The historical dictionaries converge on the core meaning: an allegation is a party's formal statement of what it undertakes to prove. Black's (both editions), Bouvier's, Burrill's, and Rapalje & Lawrence are in agreement on this baseline.
The more interesting divergence is in scope. Burrill and Bouvier give meaningful attention to ecclesiastical procedure, where allegation functions as a term of art broader than in common law practice — encompassing pleadings on both sides of a contested suit, with the defensive allegation constituting its own recognized instrument. Black's (1st Ed.) references Blackstone on this point. Anderson's is the most practically oriented of the group, flagging the material/immaterial distinction and the derivative form "alleged" as it appears in evidentiary and charging contexts.
None of the historical dictionaries adequately addresses what happened to the concept of allegation under code pleading reform or under the Federal Rules of Civil Procedure. This is an expected gap given publication dates, but researchers should not assume that historical definitions translate directly into modern procedural analysis.
Jurisdictional Note
The material allegation standard has been codified differently across jurisdictions. The California Code of Civil Procedure (§ 463) provides a frequently cited formulation and is referenced in Black's 2nd Ed. Federal practice under Rule 8 applies a notice pleading standard that substantially relaxed the common law requirement for precise, formally sufficient allegations, though the distinction between material and immaterial allegations persists in the context of motions to strike under Rule 12(f).
Encyclopedia Cross-Reference
See Law Mind Encyclopedia — Pleadings (for the role of allegations in structuring a party's case and the development of pleading standards); Civil Procedure (for the relationship between allegation, proof, and procedural sufficiency).