Definition
A duel is combat with deadly weapons fought between two persons by previous agreement or upon a previous quarrel, carried out under prescribed rules and without the sudden heat of passion that characterizes ordinary assault. Two related but historically distinct meanings attach to the term:
1. PRIVATE DUEL (MODERN LEGAL MEANING): A prearranged fight between two private individuals, typically arising from a perceived insult or injury to honor, conducted according to agreed-upon rules and with the participation of seconds. The premeditation and agreement distinguish a duel from ordinary affray or assault. Where a participant is killed, the offense is murder in the survivor, the seconds, and any complicit spectators; where no death occurs, participation typically constitutes a misdemeanor. Several state constitutions historically imposed civil disability — loss of voting rights or eligibility for public office — on duelists.
2. JUDICIAL COMBAT (HISTORICAL): In ancient and medieval law, trial by duel (also called wager of battle or trial by battle) was a formal legal procedure for resolving disputes by armed combat between parties or their champions. The outcome was treated as divine judgment on the truth of the matter at issue. This form was abolished in England by statute in 1819 and was never systematically adopted in American law.
Common Language
Modern common usage (Wiktionary): An arranged, regular combat between two private persons, often over a matter of honor; historically, judicial combat; loosely, any struggle between two contending forces or ideas.
Historical common usage (Webster's 1913): A combat between two persons, fought with deadly weapons, by agreement, usually arising from an injury or affront given by one to the other.
The common and legal definitions are unusually close for this term, but the legal definition adds two elements ordinary usage obscures: the requirement of prior agreement (distinguishing a duel from impulsive violence), and the formal criminal-law consequence structure that attaches differently to killing versus non-lethal participation.
Common Confusion
DUEL vs. AFFRAY: An affray is a fight in a public place arising from sudden passion, without prior arrangement. A duel requires premeditation and agreement. The distinction matters for both the charge and the mental-state analysis. A spontaneous brawl is an affray; the same confrontation planned the night before is a duel.
DUEL vs. TRIAL BY COMBAT (WAGER OF BATTLE): These terms are often used interchangeably in historical sources, but they describe different legal institutions. Trial by combat was a formal judicial procedure with court sanction; the private duel was extrajudicial, its outcome carrying no legal effect on the underlying dispute. Historical dictionaries sometimes treat both under the single heading "duel," which can mislead researchers working across periods.
Core Elements
For a private duel to be legally distinguished from ordinary assault or affray, sources require:
— Deadly weapons used or intended
— Prior agreement between the parties (whether formal or tacit)
— Absence of sudden heat or passion at the moment of combat
— Two or more persons acting as combatants (seconds may be charged separately)
The element of prior agreement is the load-bearing distinction. It establishes premeditation, which drives both the murder analysis if death results and the legislative rationale for dueling statutes separate from general homicide law.
Why It Matters in Research
Researchers encounter "duel" in three distinct legal contexts that require separate treatment.
CRIMINAL LAW CORPUS: Nineteenth-century state statutes often created a specific offense of dueling, separate from murder and assault. These statutes imposed graduated penalties depending on outcome (death, injury, or mere participation) and sometimes extended liability to seconds and surgeons. When reading historical criminal law sources, do not assume that "dueling" was simply prosecuted as murder — dedicated dueling statutes with their own elements and penalties were common, and a search limited to homicide materials will miss them.
CONSTITUTIONAL CORPUS: Several state constitutions — Kentucky, Pennsylvania, and Wisconsin are the most cited examples — included provisions disqualifying duelists from holding public office or exercising the franchise. These provisions appear in constitutional convention debates and early state constitutional law sources and are often overlooked in criminal law searches. If researching civil disability or disqualification clauses, dueling is an important historical case study.
HISTORICAL LEGAL PROCEDURE: Wager of battle appears in treatises on early English and feudal procedure. Glanvill, Bracton, and later Blackstone all address it. American legal dictionaries of the nineteenth century often preserve the judicial combat definition alongside the private duel definition, which can confuse a researcher who assumes the term refers only to the extrajudicial practice. Pay attention to the century and jurisdiction of any source discussing "duel" in a procedural context.
TRAP: Bouvier's definition is drawn from a Kentucky case. The precise formulation — "prescribed rules," "formal agreement," "without sudden heat or passion" — is Kentucky's statutory gloss, not a universal common-law definition. Applying that formulation to other jurisdictions or earlier periods without checking local authority is an error.
Historical Dictionary Support
The historical dictionaries in the Law Mind corpus are broadly in agreement on the core definition but differ in emphasis and scope.
Black's (both editions) offers the most functionally useful definition for criminal law research: combat with deadly weapons, by previous agreement or upon a previous quarrel. The phrase "or upon a previous quarrel" is noteworthy — it extends the definition beyond purely prearranged encounters to confrontations with a prior grievance, even if not formally arranged. This is a broader framing than Bouvier's.
Bouvier's defines the duel specifically by reference to Kentucky case law and emphasizes the formal and deliberate character of the encounter — prescribed rules, formal agreement, and absence of sudden passion. This is a narrower and more procedurally precise definition, useful for jurisdictions that adopted similar statutory language.
Anderson's is the most useful of the four for researchers interested in consequences and constitutional dimensions. It explicitly addresses the murder/misdemeanor distinction based on outcome, notes the role of seconds and spectators, and flags state constitutional disqualification provisions. Anderson's also preserves the ancient law definition (trial of truth in a doubtful case), making it the most historically comprehensive entry in this corpus.
What the historical dictionaries collectively miss: none adequately addresses the transition from dueling as a recognized (if illegal) social institution in the early nineteenth century to its near-complete disappearance as a live legal concern by the twentieth century. The persistence of anti-dueling statutes in codes long after dueling ceased to occur, and the separate life those provisions acquired as dead-letter law or as models for later disqualification clauses, is a research area the dictionaries leave unexplored.
Jurisdictional Note
Dueling statutes varied significantly by state. Southern states were slower to enact or enforce them; northern and western states more aggressively pursued both criminal liability and civil disqualification. Constitutional dueling prohibitions are state-specific and require individual state constitutional research. Federal law addressed dueling only in limited military contexts.
Encyclopedia Cross-Reference
See Law Mind Encyclopedia: Trial by Combat; Affray; Homicide (Historical).