Definition
*Tre ad largum* is a Latin phrase meaning "to go at large," used in historical legal contexts to describe the condition of a person or animal that has escaped confinement, been released from custody, or is otherwise running free without lawful restraint. The phrase appears most commonly in older common law pleadings and records to indicate that a person has broken free from legal detention or that an animal (particularly a dangerous one) has been permitted to roam without control.
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Common Language
Modern common usage (Wiktionary): No standard entry; the phrase has no modern common English usage.
Historical common usage (Webster's 1913): No entry; the phrase remained a term of legal art throughout its period of use.
This is pure Latin legal terminology with no meaningful common-language counterpart. The COMMON LANGUAGE section is omitted accordingly.
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Why It Matters in Research
Researchers will encounter *tre ad largum* almost exclusively in pre-twentieth century legal materials — English common law pleadings, colonial American court records, and early American case reports. Its appearance signals one of two distinct legal contexts: (1) the escape or unauthorized release of a person from lawful custody, or (2) the condition of a dangerous animal permitted to roam freely, which could be relevant to early tort and nuisance liability.
The phrase is rarely defined in the sources where it appears, because courts and practitioners of the era assumed Latin literacy. Researchers working in digitized early case law or handwritten court records should recognize it as a status description, not a cause of action or formal legal doctrine in itself.
*Tre ad largum* is closely associated with *at large* as a legal concept, and in corpus materials the two expressions are often used interchangeably — the Latin form appearing in formal pleadings and the English translation appearing in judicial opinions and commentaries of the same period. A search for one without the other may produce an incomplete picture.
Because the phrase appears in materials predating modern editorial indexing, it is frequently missed by keyword searches that rely on English-only terms. Researchers reconstructing early custody, escape, or dangerous-animal doctrines should include the Latin form as a search variant.
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Historical Dictionary Support
Black's Law Dictionary (2nd Ed.) gives the definition concisely: "To go at large; to escape; to be set at liberty." This formulation captures the phrase's dual application — both involuntary escape and lawful release — without distinguishing between them. That ambiguity is historically accurate; the phrase itself was neutral as to how the person or animal came to be unconfined.
Black's does not elaborate on procedural context or connect the phrase to specific causes of action, which reflects the dictionary's general treatment of Latin maxims as reference glosses rather than analytical entries. Researchers should not assume that the appearance of *tre ad largum* in a pleading carries a fixed technical meaning beyond the factual description of being unconfined.
No other sources in the Law Mind corpus provide independent entries for this term. The absence of broader dictionary support is itself instructive: *tre ad largum* was a descriptive phrase of pleading practice rather than a doctrinal term with independent legal force, and it faded from use as Latin pleading conventions gave way to modern procedural codes.
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Jurisdictional Note
The phrase belongs to the English common law tradition and carried over into early American colonial and state court practice. It has no meaningful presence in civil law jurisdictions. By the late nineteenth century, procedural reforms in most American states had eliminated formal Latin pleading, and *tre ad largum* ceased to appear in practice.
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