Definition
Risk is the exposure to the possibility of loss, harm, or an adverse outcome. In law, the term operates across several distinct doctrinal contexts, each with its own technical meaning:
1. Insurance law. The probability that a covered loss will occur, the nature of the peril insured against, and the object or subject matter exposed to that peril. A policy's "risk" thus simultaneously refers to the chance of loss, the type of hazard contemplated (fire risk, marine risk, life risk), and sometimes the insured property itself (e.g., a specific building as "the risk"). Courts distinguish between the risk assumed by the insurer and the degree of hazard, which may change during the policy period and affect coverage obligations.
2. Tort law. The foreseeable possibility of harm that a reasonable person or party must guard against. Risk in this sense underlies the negligence standard: a defendant's conduct is measured against whether a reasonable person would have recognized and mitigated the risk of injury to others. Assumption of risk is a formal defense, not merely a descriptive concept, with its own elements.
3. Contract and commercial law. The allocation between parties of the burden of loss if goods are damaged, destroyed, or fail to perform. Contracts routinely specify which party bears the risk of loss during shipping, storage, or construction. Under the UCC, risk of loss rules govern the moment at which risk transfers from seller to buyer.
4. Tax law. The "at-risk" concept limits a taxpayer's deductible losses to the amount the taxpayer has economically at stake in an activity — that is, actual exposure to economic loss rather than nominal investment.
Common Language
Modern common usage (Wiktionary): The probability of a negative outcome; the magnitude of possible loss; a possible adverse event or outcome.
Historical common usage (Webster's 1913): Hazard, danger, or peril; exposure to loss, injury, or destruction; liability to loss in property.
The common and legal meanings share a core sense of exposure to loss, but legal usage is more precise in two ways. First, law assigns risk to a party — the question is not merely whether risk exists but who bears it and what consequences follow from that allocation. Second, in insurance law, "risk" takes on a technical dual role, referring both to the chance of loss and to the insured subject matter itself — a usage that has no counterpart in ordinary speech.
Recognized Forms
/SUBTYPES
Builder's risk: The hazard to an insured subject arising from construction, alteration, or repair work performed by mechanics or contractors. Historically treated as a distinct category requiring specific policy language.
Fire risk, life risk, marine risk: Traditional insurance classifications designating the type of peril and the nature of the insured subject, each governed by distinct underwriting and legal rules.
Risks of navigation: Distinguished historically from "perils of navigation" as a broader category, encompassing hazards incident to the navigable voyage that may not rise to the level of a named peril. Courts in the 19th century were explicit that the two terms are not synonymous, with "risks of navigation" carrying wider import.
Assumption of risk: A doctrine in tort law under which a plaintiff who voluntarily encounters a known danger may be barred from recovery, either by express agreement or by conduct implying consent.
At-risk amount (tax): The taxpayer's actual economic exposure in an activity, calculated under statutory rules, setting the ceiling for deductible losses.
Why It Matters in Research
Risk is one of the most context-dependent terms in the Law Mind corpus. A search that retrieves sources from insurance, tort, contract, and tax law will surface four different doctrinal frameworks using the same word, and conflating them produces analytical errors.
In insurance sources, pay attention to whether a historical source uses "risk" to mean the peril, the degree of hazard, or the insured object. All three usages appear in 19th-century cases, sometimes within the same opinion. Modern insurance law has somewhat standardized the vocabulary, but historical policy interpretation cases will use "risk" in the object-sense freely.
The distinction between "risks of navigation" and "perils of navigation" is a documented fault line in maritime insurance. Black's 2nd edition flags this explicitly. Researchers working on marine insurance coverage disputes in historical sources should not treat the terms as interchangeable.
In tort law, assumption of risk has undergone significant doctrinal transformation. Many jurisdictions folded primary implied assumption of risk into the duty analysis, and secondary implied assumption of risk into comparative fault. A source describing assumption of risk as a complete bar to recovery may reflect the older regime; a source treating it as a percentage reduction may reflect post-comparative-fault merger. The label "assumption of risk" in a historical case does not tell you which modern category it maps onto.
In tax research, "at-risk" is a statutory term of art defined by the Internal Revenue Code. Historical dictionary sources predating the at-risk rules (enacted 1976) will not reflect this meaning. Researchers connecting older risk-of-loss concepts to modern tax doctrine should bridge carefully.
Contract allocation of risk — particularly risk of loss under the UCC — operates under rules that largely displaced common law approaches. Historical sources applying common law risk-of-loss rules (often turning on title passage) do not reflect current UCC analysis.
Historical Dictionary Support
The four shelf sources converge on risk as an insurance-law concept centered on peril, hazard, and the chance of loss. Burrill traces the term to French and Latin roots, grounding it in the sense of adventure and chance of loss, and directs readers to Marshall on Insurance and Kent's Commentaries — the foundational Anglo-American insurance treatises of the early 19th century. Anderson adds the practical taxonomy of fire, life, and marine risks, and introduces "builder's risk" as a recognized subcategory, suggesting the term had already acquired specialized sub-classifications by the late 19th century.
Black's 1st and 2nd editions are nearly identical in their core definition but the 2nd edition adds the notable "risks of navigation" sub-entry, flagging the judicial distinction from "perils of navigation" — a refinement that reflects accumulated case law between editions.
What the historical sources do not cover: tort doctrine (assumption of risk as a formal defense is absent), contract allocation of risk (including risk of loss on sale of goods), and tax law. These are entirely modern legal applications of the term. Researchers should not expect historical dictionaries to illuminate these uses; they require modern statutory and case law analysis.
Jurisdictional Note
Assumption of risk doctrine varies substantially by jurisdiction. Some states retain it as a complete defense in limited circumstances; others have fully merged it into comparative fault. Risk of loss under the UCC is largely uniform across UCC-adopting states, but party agreements routinely displace default rules, making contract language dispositive.
Encyclopedia Cross-Reference
At-Risk Limitations (The Law Mind Tax Encyclopedia)
Insurance Contracts — Reinsurance and Risk Transfer (The Law Mind Contracts & Commercial Law Encyclopedia)
Defenses to Negligence — Assumption of Risk (Express) (The Law Mind Torts & Personal Injury Encyclopedia)