Definition
"Civil law" carries three distinct meanings in legal usage, and the intended meaning varies significantly by context. Researchers must determine which sense is operative before proceeding.
1. Roman Law / The Continental Legal System. In its oldest and most technically precise legal sense, civil law refers to the body of jurisprudence derived from ancient Rome — specifically the law as systematized under the Emperor Justinian in the Corpus Juris Civilis (comprising the Code, Pandects, Institutes, and Novels) — and the legal tradition that descended from it across Continental Europe, Latin America, and other jurisdictions influenced by that tradition. In this sense, "civil law system" contrasts with the common law tradition rooted in English judge-made law. Civil law systems are characterized by comprehensive written codes, with the legislature (not the judiciary) as the primary lawmaker, and judges functioning as interpreters of codified rules rather than creators of precedent.
2. Private Law (as Opposed to Criminal Law). In modern Anglo-American legal usage, "civil law" most commonly means the body of law governing relations between private parties — contract, tort, property, family, inheritance — as distinguished from criminal law, which involves offenses against the state. A civil action results in remedies such as damages or injunctions; a criminal prosecution results in punishment. This is the sense intended in phrases like "civil liability," "civil suit," and "civil remedy."
3. Municipal or Positive Law (Archaic). In an older and largely obsolete usage, civil law referred to the law of a particular nation, city, or commonwealth as established by its own authority — that is, positive enacted law — as distinguished from natural law or the law of nations. Rapalje & Lawrence capture this sense: "that rule of action which every particular nation, commonwealth, or city has established peculiarly for itself."
Common Language
Modern common usage (Wiktionary): "The body of law dealing with the private relations between members of a community; a legal system primarily based on a legal code, commonly deriving from the Corpus Juris Civilis."
Historical common usage (Webster's 1913): "The system of jurisprudence held and administered in the Roman empire, particularly as set forth in the compilation of Justinian and his successors; — often distinguished from common law and canon law."
The gap between common and legal usage here is not a single gap but a collision of two different lay understandings, both technically correct but for different audiences. A non-lawyer hearing "civil law" today almost always means Meaning 2 — a lawsuit, not a criminal matter. A comparative law scholar or civilian attorney hearing the same phrase means Meaning 1 — the Roman-derived legal tradition. Neither group is wrong, but researchers reading across eras and jurisdictions must remain alert to context.
Common Confusion
Civil law (Meaning 1) is frequently conflated with civil law (Meaning 2) by researchers moving between comparative law materials and domestic procedural sources. The confusion compounds in Louisiana sources, where both senses are simultaneously operative: Louisiana follows a civil law system (Meaning 1) and its courts also distinguish civil from criminal actions (Meaning 2). Historical dictionaries, including Black's, explicitly flag this: the word "civil" as applied to pre-Code Louisiana law was used not in contradistinction to "criminal" but in contradistinction to English common law. Reading Louisiana cases without this distinction in mind produces systematic misreading.
Recognized Forms
/SUBTYPES
Civil law system (comparative law): The family of legal systems — including French, German, Spanish, Italian, and their derivatives — organized around comprehensive legislative codes rather than judicial precedent.
Civil law action: A lawsuit between private parties seeking non-criminal remedies. Distinguished from a criminal prosecution.
Roman civil law: The civil law in its most historically precise sense — the jurisprudence of Rome as compiled under Justinian, including the Digest (Pandects), Code, Institutes, and Novels, collectively the Corpus Juris Civilis.
Why It Matters in Research
Polysemy is the central research hazard here. The term "civil law" appears across the Law Mind corpus in all three of its senses, often without explicit disambiguation. When reading 19th-century American treatises, civil law almost always refers to Roman law and the civilian tradition — authors contrasting it with common law. When reading 20th and 21st-century procedural materials, civil law almost always means non-criminal law. Louisiana materials routinely require both senses simultaneously.
For researchers navigating historical sources: the transition from Meaning 3 (municipal/positive law) to the modern two-meaning structure happened gradually across the 18th and 19th centuries. Bouvier and Burrill still reflect some of the older tripartite structure. Black's (both editions) has largely collapsed to the first two meanings.
When tracing a specific legal principle, confirm early whether the source is operating in a civil law jurisdiction (Meaning 1) or simply describing a non-criminal proceeding (Meaning 2). The analytical frameworks are fundamentally different: civilian courts reason from code provisions; common law courts reason from precedent. A principle described as "civil law" in a 19th-century treatise may have no application in a common law jurisdiction at all.
Cross-corpus connections: Civil law in Meaning 2 connects directly to civil forfeiture, civil contempt, civil fraud penalties, and the civil/criminal distinction in family court — all of which appear in the Law Mind encyclopedia. See ENCYCLOPEDIA CROSS-REFERENCE below.
Historical Dictionary Support
The historical dictionaries are unified on the Roman law sense (Meaning 1) and treat it as primary. Burrill is the most technically precise, anchoring civil law squarely in the Corpus Juris Civilis and noting its reception into Britain and influence on early American law via Kent's Commentaries. Bouvier provides the most historical depth, tracing the development of Roman jurisprudence from the Twelve Tables through Justinian.
Black's (both editions) makes the connection to Louisiana explicit and offers a useful corrective for American researchers: in Louisiana sources, "civil law" means the Roman-derived system, not simply non-criminal law. This is the most practically important editorial note in the historical record.
What the historical dictionaries largely omit: they give limited treatment to Meaning 2 (civil versus criminal) as a standalone concept, presumably because in their era this was considered obvious or covered elsewhere. Researchers looking for the civil/criminal procedural distinction should look to entries on ACTION and CIVIL ACTION in the historical sources rather than CIVIL LAW.
Rapalje & Lawrence's treatment of Meaning 3 (municipal law sense) reflects an older strand that had largely passed from active legal usage by the time Black's first edition appeared, though traces survive in natural law scholarship.
Jurisdictional Note
Louisiana, Quebec, and Puerto Rico operate as mixed jurisdictions — civil law systems (Meaning 1) embedded within a predominantly common law federal structure. The substantive private law of these jurisdictions derives from the civilian tradition, while procedure and federal matters follow common law frameworks. In international research, civil law systems predominate across Continental Europe, Latin America, East Asia (Japan, South Korea), and much of Africa and the Middle East.
Encyclopedia Cross-Reference
Civil Forfeiture and Its Intersection with Criminal Law (The Law Mind Criminal Law Encyclopedia)
Family Law — Contempt in Family Court: Civil vs. Criminal (The Law Mind Family Law Encyclopedia)
Fraud Penalty Civil (The Law Mind Tax Encyclopedia)