Definition
A Latin term from the medieval common law carrying three distinct but related meanings:
1. Larceny or theft. The foundational meaning: the act of stealing, equivalent in substance to the common law crime of larceny.
2. A thing stolen. Used in older pleading and records to denote the stolen goods themselves, not merely the act.
3. The jurisdictional privilege of judging and executing thieves. A seigniorial liberty — sometimes styled the liberty of infangenthef — by which a lord of a manor held the prerogative to try and put to death thieves caught within his jurisdiction. This is closely related to, and often treated as synonymous with, infangenthef.
The term does not appear in modern statutory or case law. It belongs entirely to the historical vocabulary of English feudal and ecclesiastical law, and its appearance in legal records is a marker of antiquity.
Common Language
Modern common usage (Wiktionary): Wiktionary's primary association for "latrocinium" is the Second Council of Ephesus (449 AD), a church council retroactively condemned by orthodox Christianity and labeled the "Robber Council" — latrocinium being the Latin pejorative applied to it by Pope Leo I.
Historical common usage: The term has no entry in Webster's 1913, reflecting its absence from ordinary English usage even in the nineteenth century.
Editorial note: The ecclesiastical usage and the legal usage share a common Latin root — latro, meaning robber — but refer to entirely different things. A researcher encountering "latrocinium" in a canonical or ecclesiastical source is reading about a discredited church council, not a property crime. The legal dictionaries record only the secular common law meaning. Conflating the two would be a significant interpretive error.
Common Confusion
Latrocinium is occasionally confused with latrociny, which is simply an anglicized form of the same Latin root and means larceny. Rapalje & Lawrence list both terms and treat latrociny as a direct synonym for larceny. The distinction is one of form, not substance. Neither term should be confused with robbery in the modern sense: the historical sources consistently align latrocinium with theft and larceny — crimes against property without necessary violence to the person — rather than with forcible taking.
Why It Matters in Research
Latrocinium appears almost exclusively in medieval and early modern English legal records, Year Books, and treatises such as Fleta and older registries of original writs. Researchers working in Law Mind's historical corpus will encounter it in three distinct contexts, each requiring different interpretive attention.
First, when latrocinium means larceny, it functions as a placeholder for the full body of common law on theft. A document using the term in this sense should send the researcher directly to larceny materials — the term itself adds no doctrinal content beyond naming the offense.
Second, when latrocinium means a thing stolen, it appears in pleading contexts and may affect how a writ or record is read. The distinction between the act and the res matters for understanding what the document is asserting.
Third, the jurisdictional meaning — the liberty to judge and execute thieves — is the most historically significant and the most easily missed. This usage is inseparable from the feudal franchise system. Researchers encountering it should cross-reference infangenthef and outfangenthef, the companion liberties that defined the geographic reach of a lord's jurisdiction over thieves. The liberty of latrocinium in this sense is a grant from the Crown and belongs to the law of franchises, not to the general criminal law.
The ecclesiastical usage documented by Wiktionary — referring to the Council of Ephesus of 449 — is entirely separate from any common law meaning and will not appear in legal corpus materials except incidentally. Researchers in ecclesiastical or canon law sources should be alert to this divergence.
Historical Dictionary Support
The four source dictionaries are in close agreement on the core meanings, with Burrill's providing the most useful documentary anchors. Burrill cites Fleta (lib. 1, c. 38, § 7) for the meaning of "a thing stolen" and Cowell and Spelman for the franchise meaning, while pointing to the Registrum Omnium Brevium for the larceny sense. Black's (both editions) and Rapalje & Lawrence reproduce the same tripartite definition in compressed form without independent citation. None of the dictionaries distinguish the ecclesiastical usage, which is consistent with their exclusive focus on English common law materials.
What the historical dictionaries do not address is the term's practical obsolescence even within the periods they cover. By the time of the mature common law, practitioners and courts were using larceny, infangenthef, and related terms in preference to latrocinium. Its appearance in later records tends to signal either quotation from an older source or a document of unusually archaic drafting.
Jurisdictional Note
Latrocinium is a term of English common law and has no recognized meaning in American law. It does not appear in American statutes or reported cases in any operative sense. Researchers in American legal history who encounter it are reading from English sources or from American treatises drawing on English precedent.