Definition
Exposure to harm, injury, loss, or evil; a condition or circumstance that creates risk of adverse consequences to a person or property. In law, danger functions less as a self-contained doctrine and more as a threshold concept embedded across multiple bodies of law — tort, criminal, constitutional, admiralty, and evidence — where its presence, degree, and foreseeability determine legal outcomes.
Three recurring legal contexts shape how the term operates:
1. Self-defense and criminal law. Danger in this context refers to the perceived or actual threat of harm that justifies a defensive response. Courts distinguish between actual danger (the threat is real) and apparent danger (a reasonable person in the defendant's position would have believed the threat to be real). The legal standard typically requires that the danger be imminent, meaning immediate or impending rather than speculative or future.
2. Tort and negligence law. Danger is a condition giving rise to a duty of care. Whether a defendant owed a duty, breached it, or may be held strictly liable often turns on whether a danger existed, whether it was known or foreseeable, and whether it was obvious to the plaintiff. Some dangers — classified as abnormally dangerous activities — trigger strict liability without any need to prove negligence.
3. Maritime and commercial law. "Dangers of navigation" and "dangers of the sea" are terms of art in bills of lading and maritime contracts, referring to extraordinary natural perils of water travel — storm, hidden reefs, uncharted conditions — that excuse a carrier from liability for loss. The phrase does not cover losses caused by human error or want of skill.
Common Language
Modern common usage (Wiktionary): To imperil or endanger; to run a risk; also, to claim liability.
Historical common usage (Webster's 1913): Exposure to injury, loss, pain, or other evil; peril; risk. Also, in older usage: authority, jurisdiction, or control over another; and liability or subjection to penalty.
The historical common meaning diverges sharply from modern expectation. Webster's 1913 preserves two now-obsolete senses — danger as power over a person, and danger as legal liability or subjection to a statute's reach — that once appeared in legal texts. Researchers encountering pre-nineteenth-century sources may find "danger" operating in these older senses, where "standing within someone's danger" meant being subject to their authority or exposed to legal consequence, not physical peril.
Common Confusion
Danger is frequently used interchangeably with peril, risk, hazard, and jeopardy in both common writing and legal instruments, but these terms carry distinct legal weight in specific contexts. In maritime law, "perils of the sea" is the operative term of art; "dangers of the sea" is treated as synonymous but is less standard. In constitutional double jeopardy analysis, "jeopardy" is a technical term with precise attachment rules; "danger" cannot be substituted. In tort, "risk" and "hazard" carry specific connotations in products liability and abnormally dangerous activity doctrine that do not map cleanly onto the general meaning of danger.
Why It Matters in Research
Several research traps attach to this term.
First, the definitional gap by context. No single legal definition of danger exists. The threshold of danger required to justify self-defense (imminent, apparent) is different from the threshold that triggers strict liability for abnormally dangerous activities (conduct that creates serious risk of harm even with reasonable care). Researchers must identify which body of law governs before assuming a definition.
Second, the apparent/actual distinction. Anderson's entry captures this cleanly for self-defense: "apparent danger" is a legal standard requiring overt, actual demonstration of a design to harm — not mere subjective fear. Historical sources often collapse this distinction or use the terms inconsistently. When reading nineteenth-century criminal treatises or jury instructions, verify whether the court was applying an objective reasonable-person standard or a subjective one.
Third, the maritime usage. Black's entry points to "dangers of navigation" and "dangers of the river" as distinct from general danger. Bills of lading in the corpus will use these phrases as liability-limiting terms. The key interpretive rule — that the phrase excludes losses preventable by skill or judgment — is embedded in case law, not in the contract text itself. Researchers analyzing historical shipping disputes should not read "dangers of navigation" clauses as blanket exclusions.
Fourth, the obsolete jurisdictional sense. The Webster's 1913 entry preserves the medieval English sense of danger as authority or jurisdiction. This sense appears in Chaucer and Shakespeare and persists in early American legal writing that drew on English common law sources. A reference in an early colonial document to a person being "in danger" of a magistrate may mean subject to that magistrate's authority, not at physical risk.
Fifth, the known-and-obvious doctrine in premises liability. Whether a danger was "known and obvious" to the plaintiff is a central question in premises liability cases and has evolved significantly — from a complete bar to recovery (contributory negligence era) to a factor in comparative fault analysis. The corpus contains cases spanning this shift; the word "obvious danger" in an older opinion may carry doctrinal weight that a modern reader would not assume.
Historical Dictionary Support
Bouvier's entry is a cross-reference only, directing readers to "IMMEDIATE, Danger" — suggesting that Bouvier treated the legally operative concept as inseparable from imminence. This is consistent with the self-defense usage but leaves the term underdefined standing alone.
Anderson's is the most substantive of the three. His focus on apparent danger in self-defense law reflects the dominant nineteenth-century doctrinal use of the term in criminal practice. The formulation — "overt, actual demonstration, by conduct and acts, of a design to take life or do great personal injury" — is representative of jury instruction language from the period and is useful for corpus researchers analyzing criminal cases.
Black's 2nd edition is broader, defining danger as "jeopardy; exposure to loss or injury; peril" and then extending into the maritime subtypes. The citation to U.S. v. Mays (1 Idaho, 770) situates the definition in early territorial jurisprudence. The maritime entries — dangers of navigation, dangers of the river — are the most practically useful portion of the Black's entry for researchers working with commercial or admiralty documents.
What all three sources miss: tort law's evolution of danger as a trigger for strict liability (the abnormally dangerous activity doctrine did not crystallize in its modern form until the Restatement era, after Black's 2nd edition was published), and the constitutional dimensions of danger in due process and emergency powers contexts that developed through the twentieth century.
Jurisdictional Note
The apparent danger standard in self-defense varies by jurisdiction — some states require that the danger be both apparent and imminent; others allow apparent danger alone to justify deadly force if a reasonable person would have believed the threat real. Stand-your-ground statutes in some states have further modified the imminence requirement. Researchers should not assume uniform application of the Anderson formulation across jurisdictions or time periods.
Encyclopedia Cross-Reference
Strict Liability and Abnormally Dangerous Activities — Abnormally Dangerous Activities (Six-Factor Test) (torts_136): For how courts classify activities as dangerous enough to warrant strict liability regardless of care taken.
Known and Obvious Dangers (torts_36): For the premises liability doctrine governing when a danger's visibility affects a landowner's duty and a plaintiff's recovery.
Domestic Animal Liability (Known Dangerous Propensity) (torts_140): For danger as a known characteristic of an animal, triggering owner liability.