Definition
A Latin-derived term of medieval legal Latin meaning to seize or take into custody another person's goods or person, typically by attachment or other legal process. The term appears in historical common law sources as a variant form of the more standard attachiare, and signifies the act of laying hold of property or a person through formal legal authority — roughly equivalent in function to modern attachment or arrest.
Common Confusion
Detachiare and attachiare are distinct spellings in historical sources but functionally identical in meaning. Burrill notes that detachiare "seems a corruption of attachiare," and Bouvier directs readers explicitly to ATTACHIARE as the primary entry. Researchers encountering detachiare in a historical document should treat it as interchangeable with attachiare for interpretive purposes, not as a separate legal concept. The modern English word "detach" — meaning to separate or unfasten — carries nearly the opposite connotation from detachiare's legal meaning of seizing or taking hold. This semantic reversal is a significant trap for researchers who may read a document backward based on modern cognate intuition.
Why It Matters in Research
This term is a navigational hazard rather than a substantive legal concept. Its chief danger is the false-cognate problem: a researcher encountering detachiare in a medieval plea roll, writ, or procedural record and applying the modern English meaning of "detach" (to separate, release, or remove) will arrive at precisely the wrong interpretation. The term means the opposite — to seize, to attach, to take hold. Bouvier's cross-reference to attachiare is the essential pointer. Any corpus search involving detachiare should be run in parallel with attachiare, as the two forms appear interchangeably across historical sources and the same document collection may use both spellings without distinction. The term is unlikely to appear in any post-medieval English legal writing; its natural habitat is medieval Latin writs, Year Book entries, and the procedural formularies derived from them. Researchers working with Cowell's Interpreter will find detachiare treated there as a recognized form, though Burrill flags Cowell as the likely origin of the entry and treats its standing with some skepticism.
Historical Dictionary Support
All five source dictionaries agree on the definition without variation: to seize or take into custody another's goods or person. The entries are brief and functionally identical, suggesting the term was well-understood as a variant rather than a term requiring independent elaboration. The most informative commentary comes from Burrill, who identifies the word as originating with Cowell and characterizes it as a probable corruption of attachiare. This is a significant observation: it means detachiare likely never had independent legal standing but entered the dictionaries as a recorded usage from Cowell's Interpreter rather than as a term of art with its own doctrinal content. Rapalje & Lawrence add a marginal clarification — "by attachment or other process of law" — that usefully anchors the term to recognized procedural mechanisms rather than extra-legal seizure. No source identifies any case, statute, or writ in which detachiare is the operative term; it appears as a lexicographic entry, not as living legal vocabulary. Historical dictionaries do not address the false-cognate problem with modern English "detach," which is a gap researchers must supply for themselves.
Jurisdictional Note
Detachiare is a term of medieval Latin legal usage associated with English common law procedure. It has no recognized place in American law and no counterpart in civil law or equity practice under that name. Jurisdictional variation is not a meaningful consideration; the term belongs entirely to historical English legal sources.