Definition
A Latin term appearing in old English legal records with two related but distinct meanings:
1. A house and its surrounding ground; a dwelling with the land belonging to it, particularly in an urban or city context.
2. A decayed house, wall, or the ruins of a building — used to describe property in a deteriorated or ruinous state.
A third usage treats masura as a unit of land measurement, approximately equivalent to four oxgangs (an oxgang being roughly 15 to 20 acres, though the figure varied by locality). In this sense, masura denotes a substantial parcel of agricultural land, not a structure at all.
The term belongs to the vocabulary of medieval English land records, conveyances, surveys, and pleadings, and has no living legal application.
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Recognized Forms
/ SUBTYPES
The term carries at least three distinguishable uses in the historical record:
— Masura as a dwelling with appurtenant ground (urban usage, closer to the sense of mansion or messuage)
— Masura as ruins or a decayed structure (descriptive of physical condition)
— Masura as a land-area measure of approximately four oxgangs (agrarian survey usage)
These uses are not always clearly distinguished in source documents, which contributes to interpretive difficulty in archival research.
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Why It Matters in Research
Researchers encountering masura in medieval English deeds, surveys, or pleadings face a genuine ambiguity: the term may describe a dwelling, a ruin, or a quantity of land, depending entirely on context. Misreading a land-measure use as a structural reference — or vice versa — can produce significant errors in interpreting the subject matter of a conveyance or dispute.
The connection to messuage and mansion is particularly important. Where masura appears in early records describing urban property, it may function as a near-equivalent to messuage (house with curtilage), and cross-referencing to messuage-related entries and doctrine may resolve ambiguities that masura alone cannot.
The land-measure usage — four oxgangs — places masura in the same analytical space as other archaic English area terms (oxgang, bovate, virgate, hide). Researchers working on early agrarian surveys, inquisitions post mortem, or manorial extents should be alert to this quantitative sense, especially where no structure is described in surrounding text.
The term appears almost exclusively in Latin-language records. Its presence is a signal that the document is likely pre-Tudor or at minimum follows a conservative scribal tradition. It will rarely, if ever, appear in post-1600 instruments.
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Historical Dictionary Support
Black's Law Dictionary (both the first and second editions) give identical, compressed entries: a decayed house, wall, or ruins of a building, plus the four-oxgang land measure. The structural or dwelling sense — masura as a house with ground — is not mentioned in either Black's edition.
Burrill's Law Dictionary offers a richer account, attributing to Spelman the sense of a house and ground or urban dwelling, and to Cowell the ruinous or decayed sense. This divergence between authorities is itself informative: Spelman's Glossarium Archaiologicum and Cowell's Interpreter draw on different classes of documents and read the term differently. Burrill's citation of massa as the root term is also useful, pointing toward the broader semantic field of a mass of property or consolidated holding.
The practical effect is that Black's entries — taken alone — omit the affirmative dwelling-with-ground sense entirely. Researchers relying only on Black's would miss half the term's documented range. Burrill's is the more complete reference for this entry.
None of the three source dictionaries addresses the interpretive problem posed by the land-measure usage in the context of agrarian surveys, nor do they flag the overlap with messuage. These gaps require the researcher to look beyond the dictionary shelf.
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Jurisdictional Note
Masura is exclusively an English legal-historical term. It does not appear in Scots, Irish, or continental legal records in the same form or with the same range of meanings. Research use is confined to English common law archives, manorial records, and early chancery documents.
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