Definition
An archaic Law French term meaning mischance or accidental misfortune, used in early English legal sources to describe a death resulting from accident rather than felonious intent. The term appears in medieval legal treatises to classify deaths caused by falling from trees, ships, carts, horses, mills, or similar circumstances — deaths that were neither murder nor justifiable homicide, but the product of pure misfortune. MESAVENTURE is the Law French antecedent of the English legal term MISADVENTURE, and the two terms are functionally equivalent. The distinction from felonious homicide carried significant legal consequences in the early common law: a killing by misadventure did not subject the actor to the full weight of criminal punishment, though it could still trigger forfeiture obligations under older practice.
Common Language
Modern common usage (Wiktionary): Not separately defined; the word is archaic and does not appear in standard modern dictionaries as a living English term.
Historical common usage (Webster's 1913): Not listed as a distinct entry; the related term "misadventure" is defined as an unlucky accident or mishap, without legal specificity.
The gap here is the absence of a common-language foothold rather than a divergence from one. MESAVENTURE is pure Law French legal vocabulary that passed out of general English usage entirely, surviving only in historical legal sources. Researchers encountering it in medieval or early modern documents should not rely on intuition about the ordinary word "misadventure" — they should treat MESAVENTURE as a technical classification with defined legal consequences in the homicide taxonomy of early English law.
Common Confusion
MESAVENTURE is sometimes loosely equated with accidental killing in a modern negligence sense, but the medieval concept carried no implication of fault or carelessness. A death by misadventure was one in which neither party acted wrongfully — the paradigm case being a person who simply falls from a tree or is thrown from a horse. This distinguishes it from modern accidental-death doctrines, which may still turn on questions of reasonable care. Researchers should also be careful not to conflate MESAVENTURE with the plea of SE DEFENDENDO (killing in self-defense), which was a separate category of excusable homicide in early English law, or with CHANCE-MEDLEY, which involved sudden combat without malice but was not purely accidental.
Why It Matters in Research
MESAVENTURE appears almost exclusively in medieval and early modern English legal sources, particularly those written in or heavily influenced by Law French. Researchers working in coroner's records, plea rolls, or early treatise literature from the thirteenth through fifteenth centuries will encounter this term as a classification in homicide inquests. Its practical importance lies in how it fit within the medieval taxonomy of homicide: murder, manslaughter, chance-medley, misadventure, and justifiable homicide each had distinct procedural and punitive consequences. Identifying a death as MESAVENTURE could mean the difference between felony liability and a lesser outcome.
Because the term drops out of active legal use relatively early — supplanted in English texts by MISADVENTURE — researchers working with sources from the sixteenth century onward will rarely encounter MESAVENTURE. When they do, it is almost always in a passage quoting or citing Britton or another early authority rather than in a live legal context. The Britton citation preserved in Burrill (c. 7, fol. 6, 15 b) is the anchor reference for this term in the historical dictionary tradition.
The corpus connection to MISADVENTURE is direct and essential. Any Law Mind research thread involving MESAVENTURE should immediately extend to MISADVENTURE for fuller coverage of how the concept developed through English common law and into American practice.
Historical Dictionary Support
Burrill's Law Dictionary is the primary historical dictionary source for this term in the Law Mind corpus, and its entry is notably spare. Burrill defines MESAVENTURE as "a mischance," attributes a list of paradigm cases to Britton (deaths from falling from trees, ships, carts, horses, mills), and immediately cross-references MISADVENTURE — signaling that the term has no independent doctrinal life beyond that early source.
The entry illustrates a pattern common in historical law dictionaries: Law French terms of this vintage are preserved as glosses rather than developed as living doctrinal entries. Burrill is not explaining how MESAVENTURE operates in contemporary (nineteenth-century) practice because by his time it does not. He is preserving the vocabulary for readers encountering it in primary sources.
What the historical dictionaries do not supply is any detailed account of the procedural consequences of a MESAVENTURE finding in the medieval coroner's system, or how the classification interacted with the law of forfeiture. For that analysis, researchers must move beyond the dictionary shelf to the treatise literature — Britton, Bracton, and Fleta — and to secondary scholarship on medieval English criminal law.
Jurisdictional Note
MESAVENTURE is a term of English legal history with no meaningful American jurisdictional variant. It does not appear in American statutory or case law as an operative term. Research bearing on American law should proceed under MISADVENTURE or the applicable modern doctrine.