Definition
A Latin term from Roman law meaning to make publicly known; to publish or officially announce a law or legal enactment so that it becomes binding and known to those subject to it. In Roman legal practice, promulgare described the act by which a proposed or enacted law was brought to public attention — a necessary step in the legal process before a measure could take effect. The term is the direct ancestor of the modern English word "promulgate" and appears in Latin legal texts and Civil Law sources.
Common Language
Modern common usage (Wiktionary): "Promulgate" means to make known to the public; to put a law or decree into effect by formal public announcement; to promote or spread widely.
Historical common usage (Webster's 1913): "To promulgate: to make known by open declaration; to publish; as, to promulgate a law or decree."
The common English word tracks the legal meaning closely, but the gap lies in precision and historical context. In common usage, "promulgate" suggests any broad dissemination of information. In its Roman legal context, promulgare was a term of art describing a specific procedural act — the formal publication of a proposed law to the citizenry before a vote, and later the authoritative announcement of an enacted law — each carrying distinct legal consequences.
Common Confusion
Researchers should not conflate promulgare with mere notice or publication in the informal sense. In Roman procedure, promulgare a proposed law (promulgare legem) was a preliminary step allowing citizens time for deliberation before a vote in the comitia. After the Imperial period, and particularly under Justinian, the term shifted to describe the formal enactment-stage publication of law already passed. These two meanings — pre-vote public proposal and post-enactment official publication — are historically distinct and must not be collapsed. Modern administrative law uses "promulgate" primarily in the post-enactment sense, and reading that meaning back into classical sources creates interpretive error.
Why It Matters in Research
Researchers working in Civil Law history, Roman law, or comparative law will encounter promulgare as a procedural term whose meaning shifted significantly between the Republican period and the Justinianic codification. Sources written about classical Rome use the term to describe the advance publication of proposed legislation — a transparency and deliberation mechanism. Sources from the later Empire and from Justinian's corpus use it to describe the authoritative announcement of law already in force.
When consulting historical legal dictionaries, note that Burrill preserves this distinction more carefully than the Black's editions, which compress both meanings without flagging the evolution. A researcher relying solely on Black's may miss that the Republican-era usage describes a pre-legislative act, not merely a post-enactment formality.
The term also matters for researchers tracing the intellectual lineage of modern administrative promulgation requirements. The concept that law must be publicly announced before it can bind subjects — nulla poena sine lege, and the related principle that unpublished law cannot be enforced — has direct roots in the Roman procedural understanding embedded in promulgare. That conceptual thread runs through Civil Law jurisdictions and into modern administrative procedure in common law systems.
Historical Dictionary Support
All three source dictionaries agree on the core definition: promulgare means to make public or publicly known, specifically in connection with law. Black's (1st and 2nd editions) give identical, compressed entries that treat the term as straightforwardly synonymous with publishing a law after enactment.
Burrill adds the most substantive historical context, tracing the term's derivation (quasi provulgare) and citing Mackeldey's Civil Law for the classical Republican meaning: that promulgare legem originally meant making the proposal of a law publicly known so that citizens could consider it before a vote in the comitia. Burrill then notes, consistent with Justinianic sources, that by that period the term had come to carry its present meaning — i.e., publication of enacted law.
What the historical dictionaries collectively understate is the normative weight the act carried: promulgation was not mere courtesy or bureaucratic procedure but a legal prerequisite for enforceability. That dimension is implied in the sources but not made explicit, and researchers should supplement these dictionary entries with primary Civil Law texts and Mackeldey's treatise directly.
Jurisdictional Note
Promulgare is a Civil Law term and appears primarily in Roman law scholarship and in legal systems derived from the Civil Law tradition. Common law jurisdictions do not use the Latin term as a term of art, though the concept of promulgation as a requirement for the enforceability of regulations is well established in modern administrative law across both traditions.