Definition
The party who subjects another to duress — that is, the person who applies unlawful pressure, compulsion, or threat to coerce another into a legal act or transaction against that person's free will. In the context of contract law, the duressor is the actor whose conduct gives rise to a duress defense, potentially rendering an agreement voidable at the option of the coerced party. In criminal law, the term may describe the individual whose threats or violence underlie a defense of duress raised by the accused.
Common Language
Modern common usage (Wiktionary): Someone who subjects another to duress.
Historical common usage (Webster's 1913): One who subjects another to duress.
The common and legal definitions are here essentially identical in scope. The gap worth noting is not one of meaning but of register: the word duressor is rarely used outside legal and quasi-legal contexts, and both Wiktionary and Webster's appear to derive their definitions from the legal sense rather than from independent general usage.
Common Confusion
DURESSOR vs. COERCER: These terms describe overlapping conduct, but duressor is the formal legal counterpart to the doctrine of duress, carrying precise doctrinal weight when analyzing contract voidability or criminal defenses. Coercer is the broader, nontechnical term. Researchers should not treat them as interchangeable when reading older equity pleadings or contract treatises, where duressor signals a specific legal relationship between parties.
DURESSOR vs. PARTY EXERCISING UNDUE INFLUENCE: The actor in an undue influence claim is not a duressor. Duress and undue influence are distinct doctrines with different elements and different standards. A duressor operates through explicit threat or physical compulsion; undue influence typically involves a subtler manipulation of will, often within a relationship of trust or dependency. Conflating the two in historical sources can distort the legal analysis.
Why It Matters in Research
Duressor is a term of art that appears infrequently in modern legal writing but surfaces consistently in older common law treatises, equity proceedings, and contract scholarship. Researchers working in the Law Mind corpus should be aware of several navigational considerations.
First, the term is almost entirely dependent on its parent doctrine. Entries for duressor in historical dictionaries are thin — all three source dictionaries here reproduce virtually the same sentence — because the substantive legal content lives under DURESS, not under this agent-noun form. Researchers who encounter duressor in a primary source should immediately cross-reference the corpus's treatment of duress to understand the operative legal standard being assumed.
Second, the citation to Bacon's Maxims (reg. 22) is consistent across all three dictionary editions and represents the traceable origin of the term's formal legal use. Francis Bacon's Maxims of the Law is a genuine early seventeenth-century treatise, and this particular passage addresses the effect of compulsion on legal acts. When a historical source uses duressor and cites Bacon, it signals reliance on a specific common law framework — one that predates modern contract theory's more developed treatment of economic duress and anticipatory threat.
Third, modern legal writing largely avoids the word duressor in favor of circumlocutions: "the party who exercised duress," "the coercing party," or simply the defendant or plaintiff depending on procedural posture. This means that a corpus search for duressor will retrieve primarily historical materials, and absence of the term in a modern case does not mean the concept is absent.
Fourth, the doctrinal terrain around duress expanded significantly in the twentieth century, particularly with the recognition of economic duress and business compulsion as grounds for voiding contracts. Historical uses of duressor will reflect the narrower older conception — typically physical compulsion or threat of imprisonment — and should not be read to encompass the broader modern doctrine without careful attention to date and jurisdiction.
Historical Dictionary Support
Black's Law Dictionary (both editions) and Burrill's Law Dictionary reproduce the definition in nearly identical language, all tracing to Bacon's Maxims reg. 22. Burrill adds the note that duressor is "a word used by Lord Bacon," which is a useful historical signal: the term's formal legal pedigree is deliberately attributed to Bacon rather than to general common usage, suggesting it was understood as a term of art coined or at least canonized by Bacon rather than drawn from popular language.
None of the three historical dictionaries attempt to expand the definition beyond the bare agent-noun form, nor do they address procedural posture, the duressor's liability, or how the term functions across different causes of action. This reflects the dictionaries' general approach to relational legal terms — they define the actor by reference to the doctrine rather than developing independent content. Researchers should treat these entries as pointers, not as substantive treatments.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: DURESS