Definition
The body of rules governing how legal rights and obligations are enforced through the courts, as distinguished from the substantive law that defines those rights and obligations in the first place. Procedure is the mechanism by which litigation moves — from the filing of a claim through judgment and, where applicable, appeal. It encompasses everything that controls how a case is brought, conducted, and resolved, without itself determining what the underlying rights are.
Three technical sub-domains traditionally make up the full scope of procedure:
1. Pleading — the formal written statements by which parties frame their claims and defenses and present the issues for adjudication.
2. Practice — the rules and forms governing how proceedings are conducted before a tribunal, including service, motions, scheduling, and the conduct of trial.
3. Evidence — the rules determining what information may be placed before the factfinder and in what form. (Some authorities treat evidence as a separate body of law rather than a branch of procedure; the historical sources reflect this ambiguity.)
Because procedure covers so much ground, it has rarely functioned as a precise term of art. It is most useful as a conceptual category — the procedural law of a jurisdiction — and as a dividing line against which substantive law is measured.
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Common Language
Modern common usage (Wiktionary): "A particular method for performing a task; a series of small steps taken to accomplish an end; the set of established forms or methods of an organized body for accomplishing a certain task."
Historical common usage (Webster's 1913): "The act or manner of proceeding or moving forward; progress; process; operation; conduct."
The common meaning is broader and less technical than the legal meaning. In everyday use, any organized sequence of steps is a "procedure." In law, the term carries a specific structural role: it demarcates an entire domain of law — the how of adjudication — that stands in deliberate contrast to substantive law, the what. A researcher encountering "procedure" in a legal text should not assume the term is used loosely; it almost always signals this substantive/procedural distinction.
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Common Confusion
PROCEDURE vs. SUBSTANCE: The procedure/substance distinction is foundational but not always clean. Whether a particular rule is procedural or substantive has real consequences — most importantly in conflict-of-laws analysis, where courts apply the procedural law of the forum but the substantive law of another jurisdiction. Statutes of limitations, burden of proof allocations, and certain evidentiary rules have all been argued on both sides of this line in different contexts. Researchers working in conflict of laws or Erie doctrine materials should approach any source's characterization of a rule as "merely procedural" with skepticism.
PROCEDURE vs. PRACTICE: Historically, "practice" referred to the narrower set of court rules and customs governing the conduct of proceedings, while "procedure" encompassed practice plus pleading and sometimes evidence. Modern usage has largely absorbed "practice" into "procedure," but older treatises and court rules may use the terms interchangeably or distinctly depending on era and jurisdiction.
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Why It Matters in Research
The central research trap with this term is anachronism. Before the merger of law and equity in most American jurisdictions — completed federally with the adoption of the Federal Rules of Civil Procedure in 1938 — "procedure" described two parallel and incompatible systems. A case in equity proceeded by entirely different rules than a case at law. Historical sources written before merger describe a procedural landscape unrecognizable by modern standards. Researchers using 19th-century dictionaries or treatises must situate every procedural reference within the correct system (law or equity) or risk fundamental misreading.
The term is also jurisdictionally unstable. Federal courts and state courts operate under distinct procedural regimes, and individual states vary substantially. The Law Mind corpus includes sources from multiple periods and jurisdictions; "procedure" in an 1880 source may describe common law pleading rules that were swept away entirely in jurisdictions that adopted codes of procedure (the Field Code and its successors) decades earlier.
A secondary trap: the historical sources disagree on whether evidence belongs inside procedure or alongside it. Anderson's excludes evidence from procedure and treats it as a distinguished parallel body. Bouvier lists it as one of the three technical terms that together constitute procedure. This ambiguity is not merely academic — it affects how historical treatises are organized and what a reader will or will not find in a section labeled "procedure."
For constitutional research, the procedural/substantive distinction intersects with due process doctrine, where the Supreme Court has recognized both procedural due process (the required process before deprivation) and substantive due process (limits on what may be taken regardless of process). The word "procedure" in constitutional materials therefore carries additional freight not present in purely private-law contexts.
Finally, procedure is a strong connecting term across the corpus. Virtually every other entry in practice, pleading, and evidence doctrine is a subdivision of procedure. Researchers often need to begin with this entry to orient themselves before drilling into narrower terms.
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Historical Dictionary Support
The historical sources reach broad agreement on the definition but vary in their framing and completeness.
Black's (both editions), Rapalje & Lawrence, and Anderson all offer nearly identical core language: procedure is "commonly opposed to the sum of legal principles constituting the substance of the law" and denotes the rules "whereby rights are effectuated through the successful application of the proper remedies." This near-identical phrasing across multiple independent dictionaries signals that all are drawing from a common source — likely Brown's Law Dictionary or an early edition of a leading procedural treatise — rather than offering independent analysis.
Bouvier takes a different approach, describing procedure as "the mechanism of the law, as distinguished from jurisprudence, which is the science of the law." This framing is more philosophical and arguably more useful for understanding what the term is doing conceptually. Bouvier's use of the three technical terms — pleading, practice, and evidence — to define the scope of procedure also provides the most practically useful breakdown of the historical sources.
Anderson adds an important observation that the term "is so broad that it is seldom employed as a word of art," which honestly captures how the historical sources actually use it: as a framing category more than a precise operative term.
What the historical sources collectively miss: none adequately address the procedure/substance distinction as it became live in conflict-of-laws and constitutional doctrine. The 19th-century sources predate the period when that distinction became most contested. Researchers relying solely on these sources for guidance on substance/procedure characterization will find them insufficient.
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Jurisdictional Note
Federal courts follow the Federal Rules of Civil Procedure (civil), Federal Rules of Criminal Procedure (criminal), and Federal Rules of Appellate Procedure (appellate). State courts operate under their own procedural codes, many modeled on the federal rules but with significant local variations. In conflict-of-laws analysis, the forum's procedural rules generally apply even when foreign substantive law governs — making jurisdiction identification essential before any procedural question can be resolved.
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Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Civil Procedure; Pleading; Substance and Procedure (Conflict of Laws).
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