Definition
In old English law, a hollow between two mountains; a valley or glen. The term appears in legal descriptions of land, particularly in early conveyancing and real property instruments where natural geographical features served as boundary markers or descriptive elements of a grant. Coke on Littleton (5b) is the primary authority cited by historical legal sources.
Common Language
Modern common usage (Wiktionary): A valley in a mountain area, especially one with a stream in the bottom.
Historical common usage (Webster's 1913): Not separately listed; the term is a variant of "glen," denoting a narrow valley, especially among mountains.
The legal and common meanings here are essentially the same in substance. The distinction is contextual: as a legal term, "glyn" carries significance as a term of art in old English land description, where its precise geographic meaning could bear on the extent or boundaries of a property grant. A researcher encountering "glyn" in a modern or common source would understand the physical feature; the legal weight lies in how that feature was used to define real property.
Why It Matters in Research
"Glyn" is a relic term encountered almost exclusively in early English land records, deeds, grants, and boundary descriptions — most likely pre-dating modern surveying conventions. Researchers working in medieval or early modern English real property materials should be alert to it as a descriptive boundary marker rather than a term of legal doctrine. It belongs to the class of topographical words — alongside "moor," "fen," "coppice," and similar terms — that appear in ancient conveyances and whose precise meaning could affect interpretation of the land conveyed.
The term has no operational significance in modern Anglo-American law and will not appear in contemporary statutes, case law, or property instruments. Its value to the modern researcher is almost entirely archival: recognizing it when it appears in historical source material and understanding that it denotes a geographical feature used in description, not a legal concept with doctrinal content.
Researchers working with Welsh or border English land records may encounter "glyn" more frequently than those working in other English regions, as the word has Welsh-language roots and appears more commonly in Welsh topographical nomenclature. This has no bearing on legal meaning but may affect which archival collections are most relevant.
Historical Dictionary Support
The three source dictionaries are in close agreement. Black's (both editions) and Burrill all trace the term to Coke on Littleton 5b and define it as a hollow between two mountains or a valley. Burrill adds the gloss "a valley," signaling that contemporaneous legal usage treated "glyn" and "valley" as functionally equivalent in land description. No source suggests any technical legal meaning beyond the topographical one, and none records any doctrinal elaboration or case law application beyond the Coke citation.
What the historical sources do not address is whether "glyn" carried any significance in determining the extent of a grant — for instance, whether land described as bounded by a glyn included or excluded the valley floor, or how disputes over the term were resolved. Researchers needing that level of detail would need to go beyond dictionary sources to treatises on early English conveyancing or to the Coke passage itself.
Jurisdictional Note
The term is specific to old English law and has no recognized equivalent function in modern American, Canadian, or other common law jurisdictions. In Wales, "glyn" remains a living topographical word and appears in place names, but this has no legal significance in current Welsh or English law.