Definition
Law spiritual is an older term for ecclesiastical law — the body of law administered by church courts and governing matters within the jurisdiction of the church. In English legal history, this included questions of marriage and legitimacy, testamentary matters affecting personal property, tithes, clerical conduct, heresy, and offenses against religious morality. The term distinguished church-administered law from the "law temporal," which governed secular matters in the common law and equity courts.
The phrase is rarely encountered in modern legal writing. Where it appears, it is invariably in historical context, referring to the parallel legal jurisdiction that the Church of England (and before the Reformation, the Roman Catholic Church) exercised alongside the royal courts.
Common Language
Modern common usage (Wiktionary): No established entry. The phrase carries its plain-language meaning — law of a spiritual or religious character — but this colloquial sense does not map cleanly onto the term's historical legal content.
Historical common usage (Webster's 1913): Not separately defined; "spiritual" in legal contexts was understood to mean "of or pertaining to the church" or "ecclesiastical," as distinct from "temporal."
The gap that matters: In ordinary speech, "spiritual" suggests personal religion or matters of the soul. In its legal sense, law spiritual was an institutional and jurisdictional concept — a functioning court system with binding authority, enforceable judgments, and defined subject-matter competence. A researcher encountering the phrase in historical sources should treat it as a synonym for ecclesiastical jurisdiction, not a vague reference to religious principle.
Common Confusion
Law spiritual is frequently conflated with canon law in a loose sense, but the distinction can matter. Canon law refers to the internal rules of the church as a religious institution; law spiritual, as used in English legal sources, refers to that body of law as it was administered through courts exercising recognized legal jurisdiction within the English legal system. The two overlap substantially but are not identical — particularly after the English Reformation, when Parliament and the Crown reshaped ecclesiastical court jurisdiction through statute, producing a hybrid body of ecclesiastical law that was simultaneously state law and church law.
Why It Matters in Research
This term is a navigational marker rather than an operative legal concept. When you encounter "law spiritual" in primary sources, you are in a pre-modern or early modern English legal context, almost certainly before the mid-nineteenth century reforms that transferred much ecclesiastical court jurisdiction to civil courts (Matrimonial Causes Act 1857; Court of Probate Act 1857). Those reforms are a major inflection point: after them, "law spiritual" as a live jurisdictional category largely dissolves into secular statutory frameworks.
Researchers working in colonial American legal sources should note that ecclesiastical court jurisdiction was never fully transplanted to the American colonies. What operated under the label of "law spiritual" in England had no direct institutional counterpart in most colonial jurisdictions, though ecclesiastical law concepts (especially regarding marriage, legitimacy, and testamentary matters) persisted in American law through equity and common law channels. This absence can produce misleading silences in the record.
The phrase "law temporal" is the necessary counterpart and frequently appears alongside law spiritual in the same sources. Understanding which court — ecclesiastical or common law — held jurisdiction over a particular matter is often essential to tracing the correct line of authority in historical legal research. Subject-matter jurisdiction disputes between the two systems were a recurring feature of English legal history for centuries.
Bouvier's cross-reference to "Ecclesiastical law (q.v.)" is the correct research path: the substantive content is developed under that heading, not under law spiritual itself.
Historical Dictionary Support
All three source dictionaries treat law spiritual as a simple definitional pointer: it equals ecclesiastical law, full stop. Black's and Rapalje & Lawrence both cite Co. Litt. 344 — Coke upon Littleton — as authority, which is consistent with the phrase's currency in the seventeenth-century English legal literature from which much American legal vocabulary descends. Bouvier dispenses with even that citation and redirects the reader to the ecclesiastical law entry.
The sources agree completely, which itself tells researchers something: by the time these dictionaries were compiled (nineteenth century), law spiritual was already a historical term being recorded rather than a living concept being defined. None of the three dictionaries offer substantive treatment of the term's content, jurisdiction, or development — they simply translate it and move on. This means the dictionaries are useful for confirming meaning but not for understanding the underlying legal system, which requires going to ecclesiastical law sources directly.
Jurisdictional Note
Law spiritual as an operative jurisdictional category is specific to English legal history and to legal systems derived from it that preserved ecclesiastical court jurisdiction. It has no meaningful application in modern American law. Researchers working in Scottish, Irish, or continental European ecclesiastical legal history will find related but distinct institutional frameworks operating under different terminological conventions.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Ecclesiastical Law; Canon Law and the English Reformation; Ecclesiastical Courts.