Definition
An archaic Latin term appearing in old English legal records, used interchangeably with "hide" — a traditional Anglo-Saxon unit of land measurement. Conventionally described as containing approximately one hundred acres, though the actual quantity varied considerably across different regions of the kingdom. The hide was a fiscal and administrative unit as much as a geographic one, used as a basis for taxation, military obligation, and estate assessment in pre- and post-Conquest England.
Common Language
Modern common usage (Wiktionary): Simple past tense of the verb "hyde" — an archaic or dialectal spelling of "hide."
Historical common usage (Webster's 1913): Not independently defined; "hide" in its land-measurement sense was treated as a distinct noun from the verb "to hide."
The ordinary-language use of "hyd" or "hyde" (as a past-tense verb) has no connection whatsoever to the legal and historical meaning. Encountering "hyd" in an old English legal document signals a unit of land, not any verbal construction. The orthographic similarity creates a real risk of misreading in manuscript sources.
Common Confusion
HYD / HIDE / HYDE: These three spellings appear interchangeably in historical records and represent the same land-measurement concept. None is more authoritative than the others in a given document — scribal spelling was inconsistent across centuries and localities. Researchers should not treat variant spellings as distinct terms or assume they carry different legal weight.
Why It Matters in Research
Researchers working with Domesday Book materials, Anglo-Saxon charters, feudal tenure records, or early English tax documents (such as Danegeld assessments) will encounter "hyd," "hide," and "hyde" as core units of fiscal reckoning. The term matters in several specific ways:
First, the quantitative instability is significant. Neither Black's Law Dictionary edition commits to a fixed acreage beyond "according to some, a hundred acres," and both acknowledge regional variation. The Dialogus de Scaccario — a 12th-century treatise on royal finance — is cited as assigning the hundred-acre figure, but even that source reflects an idealized administrative standard rather than a consistent geographic reality. Researchers should not assume uniformity when calculating estate sizes from historical records.
Second, the hide carried obligations, not just dimensions. A hide was the unit upon which geld (tax) was assessed and military service was sometimes calculated. Disputes about hidation — how many hides an estate was assessed at — were substantive legal matters, not mere surveying questions. A document stating a manor "holds five hyds" is making a fiscal and tenurial statement.
Third, the term effectively disappears from English legal usage after the medieval period. It will not appear in early modern or modern legal materials except as a historical reference. Encountering it in sources post-dating the 13th century should prompt scrutiny — it may signal a historical recitation, an antiquarian gloss, or a scribal archaism.
Fourth, Latin legal records may use "hida" as the nominative form, with "hyd" appearing as an abbreviated or vernacular rendering. Researchers using indexed or digitized manuscript databases should search all variant forms.
Historical Dictionary Support
Both Black's Law Dictionary editions reproduce essentially identical entries, offering no substantive development between them. Both cite the Dialogus de Scaccario for the hundred-acre figure and both acknowledge regional variation — a candid admission that the term resists precise definition. Neither edition addresses the hide's fiscal function, which was arguably more important in legal practice than its geographic dimension.
The historical dictionaries do not cross-reference related terms such as "carucate" (the parallel northern English and Danelaw unit) or "virgate" (a subdivision of the hide, typically one-quarter). This omission limits the utility of the dictionary entries standing alone. Researchers consulting Black's on this term should treat the entry as a starting point, not a complete account.
Jurisdictional Note
The hide was an English unit with no direct counterpart in Scottish or Welsh legal tradition, and it has no application in American law. Research use is confined to English legal history, principally the period from the Anglo-Saxon era through the early Plantagenet period.