Definition
In historical English law, debrusure denotes a breaking — specifically, the act of breaking into or through something, used in the context of forcible entry, trespass, or breach of enclosure. The term appears in early Anglo-Norman legal texts as a noun form derived from the verb debruser (to break), and functions as a formal descriptor of the physical act of breaking that underlies certain trespassory or criminal offenses.
The term is not in active modern legal use. Its significance is almost entirely confined to medieval and early common law sources, where precise Latin and Law French vocabulary was used to distinguish the specific physical act of breaking from related concepts such as entry or dispossession.
Common Confusion
Debrusure should not be conflated with the modern tort concept of breaking and entering, nor with the criminal law element of "breaking" in common law burglary. While debrusure describes the same underlying physical act, it operates within a different doctrinal framework — one rooted in early Norman-influenced English law, before the systematic development of burglary and trespass as distinct bodies of doctrine. Researchers encountering debrusure in historical sources should resist mapping it directly onto modern categorical offenses.
Why It Matters in Research
This term is a navigational marker, not a living doctrine. Researchers will encounter debrusure almost exclusively in early English legal texts — particularly in Britton, the late thirteenth-century law book compiled in Law French under the authority of Edward I, which Burrill's citation (Britt. c. 1) directly references. Because the term appears so early and so narrowly in the corpus, its presence in a source is itself a chronological signal: you are working in pre-Yearbook or early Yearbook territory.
Several research traps are worth flagging:
First, the term is easily missed in searches because Law French orthography was not standardized. Variant spellings — debruser, debrusure, debruisure — may appear across different manuscript traditions or printed editions of the same source. Keyword searches in digitized legal corpora should account for this variation.
Second, Burrill's entry is extremely spare, offering only the definition "a breaking" and a single source citation. Researchers who rely solely on dictionary coverage will find almost nothing here. The substance lies in the primary source itself — Britton — and in the surrounding doctrinal context of early Norman-English trespass and forcible entry law.
Third, because debrusure belongs to a period when Law French, Latin, and English legal concepts overlapped and competed, a researcher tracing the development of breaking-related offenses (burglary, housebreaking, forcible entry) through history will need to work across linguistic registers. Debrusure is one node in that network, but not the only one, and cross-referencing Latin equivalents such as frangere or fractio may be necessary to follow the concept fully through later sources.
Historical Dictionary Support
Burrill's Law Dictionary provides the only coverage identified in the Law Mind shelf for this term. The entry is minimal: a Law French label, a one-word English gloss ("a breaking"), derivation from debruser, and a single citation to Britton, chapter 1. There is nothing here that resolves doctrinal questions or provides context — Burrill is functioning purely as a glossary entry.
What Burrill does not provide is any indication of how debrusure operated within the legal rules of Britton's text — whether it was a term of art distinguishing mere entry from forcible entry, or whether it carried implications for the nature of the wrong and the available remedy. Researchers seeking that level of analysis must go to Britton directly, and should consider consulting F.M. Nichols's nineteenth-century edition and translation of Britton, which provides commentary alongside the original Law French text.
No coverage of this term was identified in other historical legal dictionaries on the Law Mind shelf, including Bouvier, Black, or Tomlin. The absence is unsurprising given the term's extreme antiquity and narrow usage.
Jurisdictional Note
Debrusure is a term of English law exclusively. It has no known counterpart in American, Scottish, or civilian legal traditions. Its relevance is limited to research into medieval English common law and its Norman-French sources.