Definition
An archaic Latin term from medieval English law with two related but distinct senses: (1) goods, property, or substance generally, including royal treasure; and (2) more specifically, a beast of burden used as a unit or measure of working property. The term appeared in feudal documents, writs, and pleadings where the ownership, seizure, or forfeiture of movable property — particularly livestock used for agricultural labor — was at issue.
Why It Matters in Research
AVERUM is a term a researcher will encounter only in medieval and early common law materials — writs, plea rolls, manorial records, and feudal instruments. Its primary research significance lies in its dual meaning: a reader who encounters AVERUM in a property dispute must determine from context whether the term refers to goods and wealth generally or to draft animals specifically, since the legal consequences in each instance may differ substantially.
The beast-of-burden sense is the more operationally specific and appears most frequently in agrarian and manorial contexts, where work animals (oxen, horses) constituted a significant portion of a tenant's productive property and could be subject to distress, forfeiture, or heriot. The broader property sense overlaps with terms like AVERIA, BONA, and CATALLA, and researchers must be alert to substitution of these terms across different scribal traditions and regional variants of medieval Latin.
The term does not survive into modern legal usage and will not appear in post-medieval statutes or common law reports except as a historical reference. Researchers working in Law Mind's corpus of older English legal materials should treat AVERUM as a reliable terminus: its presence signals a document of significant antiquity, likely pre-Tudor, and warrants cross-referencing against manorial law, distress procedures, and feudal tenure records.
Historical Dictionary Support
The three source dictionaries — Black's (1st and 2nd editions) and Burrill's — are in near-complete agreement. All three define AVERUM as "goods, property, substance; a beast of burden," and all three attribute the term to Spelman, referring to Sir Henry Spelman's Glossarium Archaiologicum, the foundational glossary of medieval English legal Latin. Burrill adds the French derivation (avoir, to have) and the specific gloss "royal treasure," a detail the Black's editions omit. That addition is worth noting: if AVERUM encompassed royal treasure in certain usages, its appearance in a document touching crown property could carry significance beyond ordinary personal goods.
None of the three dictionaries provide case law or statutory references, which reflects the term's obsolescence — by the time systematic English law reporting matured, AVERUM had already passed out of active legal vocabulary. Researchers should not expect to find the term glossed or interpreted in reported decisions and should rely instead on Spelman directly and on diplomatic and manorial history scholarship for contextual precision.