Definition
In historical English law, a foreigner; an alien; a person born outside the realm and therefore without the legal standing of a natural-born subject. The term appears in medieval legal sources, particularly in Bracton, as a designation for one classified as *extraneus* — literally, an outsider or stranger to the king's law. As a legal category, the *mut* (or foreigner) occupied a diminished position in the feudal legal order, with limited capacity to hold land, bring actions, or claim the protections afforded to English subjects by birth.
Common Language
Modern common usage (Wiktionary): An alternative spelling of *mutt*, most commonly meaning a dog of mixed or unknown breed, or informally, a person regarded as stupid or foolish.
Historical common usage (Webster's 1913): Not separately defined; treated as a variant of *mutt*.
The gap between common and legal meaning is total. The modern common word refers to dogs or carries a mild insult; the legal term designates a specific status in the medieval English law of persons — a foreigner excluded from certain rights and protections. No meaningful continuity of meaning connects the two.
Common Confusion
*Mut* should not be confused with *mute* (silence or inability to speak, relevant in criminal procedure when a defendant stands mute at arraignment), despite superficial similarity in spelling. The two terms are unrelated in origin and legal meaning. Researchers encountering *mut* in medieval or early common law sources should also distinguish it from *villein* or *serf* — also persons of diminished legal capacity, but on grounds of unfree status rather than foreign birth.
Why It Matters in Research
This term is rarely encountered outside of medieval and early common law sources, and almost never appears in modern legal materials. Researchers working in Bracton, Glanvill, or other foundational English treatises will find *mut* (and its Latin counterpart *extraneus*) used to categorize persons in a legal system that drew sharp distinctions between subjects and strangers.
The key research trap is anachronism: the medieval category of *mut* or *extraneus* does not map neatly onto modern concepts of alienage or immigration status. Medieval foreign status was tied to feudal allegiance and the personal nature of the king's protection, not to a state-administered body of nationality law. Researchers should resist translating the term directly into modern alien/citizen frameworks.
Burrill's entry cross-references Bracton explicitly, signaling that the primary interpretive authority for this term lies in the medieval treatise tradition, not in later common law case development. Researchers using Burrill should treat the entry as a pointer to Bracton rather than a standalone definition.
The term has essentially no life in post-medieval sources. By the time English law systematized alienage doctrine in the early modern period, *mut* had dropped out of legal usage entirely in favor of *alien*, *denizen*, and related terminology.
Historical Dictionary Support
Burrill's Law Dictionary is the only shelf source covering this term, and its entry is sparse — a single line noting that *mut* meant a foreigner (*extraneus*) and directing the reader to the definition in Bracton. This brevity is itself informative: by Burrill's era (mid-nineteenth century), the term was purely of antiquarian interest, preserved in the dictionary for the benefit of readers encountering it in historical sources rather than in active legal practice.
Burrill's reliance on Bracton as the interpretive authority reflects the standard nineteenth-century approach to archaic terms: trace to the oldest authoritative source and rest there. No subsequent doctrinal development is noted because none existed. Earlier glossaries and abridgments in the common law tradition similarly treat this as a term confined to the medieval period.
Jurisdictional Note
The term belongs exclusively to the historical common law of England. It has no independent existence in American, Scottish, or other common law jurisdictions, and no statutory or constitutional usage in any modern legal system.