Definition
Amendment has two distinct legal meanings depending on context.
1. In practice (procedural). The correction of an error in a writ, process, pleading, or other court proceeding. An amendment may be made as a matter of course, by consent of parties, or by leave of court upon motion. Its purpose is to bring the record or pleading into conformity with the facts or with the rules of practice, without requiring the party to abandon the action and recommence. Amendments are distinguished from supplements, which add new matter, and from the original pleading, which the amendment does not replace wholesale but rather corrects or modifies.
2. In legislation. An alteration proposed or adopted to a bill under consideration, to a statute already enacted, or to a foundational legal instrument such as a constitution. A legislative amendment may add, change, substitute, or omit text. In the federal constitutional context, the term refers specifically to formal alterations to the United States Constitution made pursuant to Article V, resulting in numbered amendments that carry independent legal force.
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Common Language
Modern common usage (Wiktionary): An alteration or change for the better; a correction of faults; reformation of conduct by quitting vices. In public bodies, any alteration made or proposed to a bill or motion by adding, changing, substituting, or omitting. Also, an addition or alteration to a constitution.
Historical common usage (Webster's 1913): An alteration or change for the better; correction of a fault or of faults; reformation of life by quitting vices. In public bodies, any alteration made or proposed to be made in a bill or motion.
The common meaning of amendment carries a moral or reformatory connotation — improvement of character or conduct — that is entirely absent from legal usage. In law, amendment is a neutral procedural or legislative act with no implication that the original was defective in any evaluative sense. A researcher encountering "amendment" in older texts should not read moral improvement into what is a technical corrective or legislative act.
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Common Confusion
Amendment vs. Supplement: An amendment corrects or modifies existing text; a supplement adds entirely new matter without altering what stands. Older pleading practice drew a sharp line between the two, and courts sometimes denied amendments where the proper vehicle was a supplemental pleading.
Amendment vs. Repeal: A legislative amendment alters the text of an existing law while leaving the underlying law operative as modified. A repeal extinguishes the law or provision entirely. The distinction matters in statutory construction: a repealed provision cannot be revived by reference, while an amended provision continues in its amended form.
Constitutional Amendment vs. Constitutional Revision: Some state constitutions distinguish between amendments (targeted alterations) and revisions (fundamental restructuring), requiring different procedural thresholds for each. This distinction does not apply to the federal Constitution, which uses a single Article V process for all formal changes.
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Recognized Forms
/SUBTYPES
In procedural context:
- Amendment of course: An amendment a party is entitled to make as of right, without court permission, within a defined period or stage of proceedings.
- Amendment by consent: Made upon agreement of all parties.
- Amendment by leave of court: Requires a motion; court has discretion to grant or deny.
In legislative context:
- Floor amendment: Proposed during floor debate on a bill.
- Committee amendment: Adopted at the committee stage before floor consideration.
- Amendment in the nature of a substitute: Replaces the entire text of the bill while preserving the bill's number and procedural posture.
- Constitutional amendment: Formal alteration to a constitution through a prescribed supermajority or ratification process.
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Why It Matters in Research
The dual meaning of amendment — procedural correction versus legislative alteration — creates indexing and contextual traps in historical sources. A pre-twentieth-century court opinion discussing the "right to amend" may be addressing pleading practice under common law or equity rules, not any legislative or constitutional process. Researchers should establish context before assuming which meaning applies.
In the federal constitutional corpus, "the Amendment" or a numbered amendment (e.g., "the Fourteenth Amendment") refers to a discrete constitutional text with its own interpretive lineage. These provisions have generated enormous secondary literature, and Law Mind materials treating constitutional amendments should be searched by amendment number as well as by subject matter (due process, equal protection, free speech, etc.).
In historical pleading sources, amendment practice was shaped by the distinctions between courts of law and courts of equity. Equity was generally more permissive in allowing amendments than courts of common law, which operated under stricter rules about variance between pleading and proof. Statutes of jeofails — legislative enactments designed to cure technical defects — often overlapped with amendment practice and should be consulted when tracing the historical law of amendments in pleading.
Bouvier notes the constitutional dimension explicitly and cross-references Article V; this signals that by the mid-nineteenth century the constitutional meaning had become sufficiently distinct to warrant separate treatment. Researchers working in early national period materials may find the constitutional and legislative senses less differentiated than in modern usage.
State procedural codes and, later, the Federal Rules of Civil Procedure substantially liberalized amendment practice relative to common law. Research into amendment rights in pre-Rules federal or state practice requires attention to the governing procedural regime, which varied significantly by jurisdiction and era.
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Historical Dictionary Support
The historical dictionaries converge on the two core meanings — procedural correction and legislative alteration — with minor variations in emphasis. Black's (both editions) and Burrill focus almost exclusively on the procedural sense, citing Blackstone's Commentaries and Tidd's Practice as authority, which reflects the common law pleading tradition these works were designed to serve.
Bouvier is the most comprehensive, treating both the legislative and constitutional senses as distinct and noting the Senate's power over money bills as an illustration of amendment in the legislative context. Bouvier's cross-reference to the Constitution of the United States signals that the dictionary recognized constitutional amendment as a topic requiring separate encyclopedia treatment — a structural choice that speaks to how American legal literature was already organizing the concept by the mid-1800s.
Rapalje & Lawrence provide the most useful definition from a research standpoint: they explicitly describe what triggers amendment in practice — discovering from the defendant's pleadings that correction is needed — giving the term procedural texture that pure definitions omit.
Anderson's treatment of amendment in the context of latent ambiguity in wills is a divergence from the other sources and represents a specialized usage (amendment of a will, or extrinsic evidence curing ambiguity) that does not map cleanly onto either the standard procedural or legislative meanings. Researchers consulting Anderson for general amendment doctrine should note this context.
None of the historical dictionaries address administrative rulemaking amendments — the alteration of agency regulations through notice-and-comment or other processes — reflecting the pre-administrative-state vintage of these sources. Modern research on regulatory amendments requires contemporary secondary sources.
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Jurisdictional Note
Amendment practice in pleading varies significantly between federal and state courts and across time periods. The Federal Rules of Civil Procedure (Rule 15) govern amendments in federal civil litigation and are notably permissive; state courts may follow analogous rules or retain older code pleading restrictions. Constitutional amendment procedures differ sharply between the federal government and the states, with many state constitutions providing for amendment by voter initiative — a mechanism entirely absent from Article V.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Constitutional Amendments; Pleading — Amendment and Variance; Legislative Process.
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