Definition
Pacatio is a Latin term from medieval legal usage meaning payment. The word appears in formal legal instruments and records as a synonym for the act of paying a debt, satisfying an obligation, or tendering what is due under a contract or judgment. In the context where it appears in the historical record, it functions as a substantive noun designating the completed act of payment rather than an obligation to pay.
---
Why It Matters in Research
Pacatio surfaces primarily in Latin legal records, charters, and instruments from the medieval period. Researchers working with pre-modern English common law materials, ecclesiastical records, or continental European legal texts may encounter the term in its untranslated form. Because the Black's Law Dictionary entries for pacatio cite Matthew Paris around A.D. 1248, the term belongs squarely to the high medieval Latin legal vocabulary, not to classical Roman law or to the modern common law tradition.
The practical research risk is straightforward: pacatio is not a term of art in modern Anglo-American law and will not appear in modern statutes, regulations, or case law. A researcher who encounters it in a document is almost certainly working with a medieval Latin primary source or a scholarly commentary on such a source. In that context, it should be treated as a direct equivalent of "payment" in the operative legal sense — the discharge of an obligation by delivery of money or its equivalent.
Researchers using the Law Mind corpus should note that both Black's editions reproduce the same minimal entry without expansion, indicating the editors regarded this as a simple translation term requiring no doctrinal elaboration. The reference to Matthew Paris anchors it in a specific historical moment and source tradition, which may assist researchers in tracing the term through the Chronicle and related 13th-century materials.
---
Historical Dictionary Support
Both the first and second editions of Black's Law Dictionary give identical, bare-bones entries: "Payment. Mat. Par. A. D. 1248." The citation to Matthew Paris (Mat. Par.) identifies the Chronica Majora or related works of the English chronicler and historian Matthew Paris, who wrote extensively in Latin during the mid-13th century. His works are a recognized source for medieval legal and administrative vocabulary.
The historical dictionaries offer no additional doctrinal content, no discussion of how pacatio related to cognate Latin terms, and no suggestion of contested or variable meanings. This unanimity signals that for legal dictionary purposes the term was always understood as a simple lexical translation, not a concept requiring independent analysis. Historical sources miss any nuance that might exist between pacatio and related Latin payment terms such as solutio (which in Roman law had a more technically developed meaning as the discharge of an obligation). Researchers working in Roman law sources should not assume pacatio and solutio are interchangeable without independent verification in the source tradition they are examining.
---