Definition
Dec. is a common abbreviation appearing in legal and historical texts with several distinct meanings depending on context:
1. Dean (Decanus). In older English and ecclesiastical legal writing, "Dec." or "Decanus" refers to a dean — an officer holding administrative or supervisory authority over a defined unit. The term applied to officers in ecclesiastical, civil, and military contexts. In ecclesiastical law, the dean held jurisdiction over a deanery, supervising clergy within that territorial unit. In monastic law, the decanus monasticus was an officer set over ten monks — an internal governance role within the monastery rather than a broader jurisdictional one. The term was also extended to civil and military officers of comparable supervisory rank.
2. Decrease / Decreased. In modern legal usage, "dec." frequently abbreviates "decrease," "deceased," or "declaration," depending on the document type. Context is essential. In estate and probate instruments, "dec'd" typically signals "deceased." In legislative and regulatory materials, "dec." may indicate a declaratory instrument or simply "decrease" in numerical or financial schedules.
3. Declaration. In some older pleading contexts and court documents, "Dec." abbreviates "Declaration," the plaintiff's principal pleading under common law procedure. This usage has largely fallen away in modern practice but appears with regularity in pre-code case records and treatise indexes.
Common Confusion
The abbreviation "Dec." is easily confused across at least three distinct referents — decanus (dean), declaration, deceased, and decrease — and a researcher who assumes one meaning without checking context will misread the source. In ecclesiastical and canon law materials, the decanus meaning dominates. In probate and estate records, "dec'd" or "dec." almost always signals deceased. In pre-code pleading indexes and common law court records, the declaration meaning is standard. Confusing decanus monasticus (an internal officer over ten monks) with decanus ecclesiasticus (a dean holding jurisdictional authority over a deanery) is a separate but related error common in historical sources.
Recognized Forms
/SUBTYPES
Decanus ruralis: The rural dean, an officer exercising supervisory jurisdiction over clergy within a rural deanery. A territorial and administrative role in ecclesiastical governance.
Decanus monasticus: The monastic dean, an internal officer set over ten monks within a monastery. Not a territorial or jurisdictional officer in the external sense.
Decanus civilis / militaris: The dean in civil or military contexts, holding analogous supervisory authority over a defined unit of persons. Spelman notes the term extended beyond ecclesiastical use in old English law.
Why It Matters in Research
Researchers encountering "Dec." in Law Mind corpus materials must resolve the abbreviation from context before proceeding. The ecclesiastical and monastic meanings are the most historically embedded and appear in sources treating pre-Reformation English church governance, canon law, and monastic regulation. Burrill's entry situates decanus within a discussion of contingent obligations and then pivots to ecclesiastical officers — a placement that reflects older encyclopedic organization, not logical connection. Do not assume the surrounding text will clarify which officer type is meant; check the subject heading or chapter context directly.
For researchers working in common law pleading records, "Dec." as declaration is the operative meaning and connects to the formal sequence of pleadings — declaration, plea, replication — that governed civil litigation before code pleading reforms. This usage is invisible in most modern glossaries.
The monastic dean (decanus monasticus) is frequently underexplored in legal sources because the role was primarily internal to religious houses rather than recognized in royal or ecclesiastical courts. Sources that do treat it, including Spelman, are more reliable than later secondary digests that flatten the distinction between monastic and jurisdictional deans.
Historical Dictionary Support
Burrill's Law Dictionary treats "dec." primarily through the decanus entry, drawing on Spelman for the proposition that the term applied not only to ecclesiastical officers but to civil and military ones as well. Burrill distinguishes decanus monasticus explicitly from the jurisdictional dean, which is useful and accurate. The surrounding text in Burrill, referencing debitum in præsenti and contingent claims, is unrelated to the dec. abbreviation proper — a consequence of Burrill's alphabetical sequencing running two separate headings together across pages 450-451.
Spelman remains the primary historical authority on the breadth of decanus across English legal usage. Modern legal dictionaries largely drop the Latin form and treat "dec." only as a generic abbreviation, losing the officer-type distinctions that matter for historical research.
Jurisdictional Note
The ecclesiastical officer meanings are specific to English and canon law traditions and have no direct American legal equivalent. In American legal materials, "dec." almost exclusively means deceased, declaration, or decrease. Researchers working in comparative or historical ecclesiastical law should not transpose American usage into pre-Reformation English sources.
Encyclopedia Cross-Reference
Law Mind Encyclopedia: Ecclesiastical Officers; Monastic Institutions