What does dangerousness mean?
Dangerousness is a noun denoting the quality or degree of being dangerous — that is, how likely a person, thing, or situation is to cause harm. While everyday English typically relies on the adjective "dangerous," the noun form appears most often in formal, technical settings where harm must be measured or judged rather than merely described. It is especially prominent in law and psychiatry: judges weigh a defendant's dangerousness when deciding on bail or sentencing, and clinicians may assess a patient's dangerousness before approving release. Risk analysts likewise speak of the dangerousness of hazards such as chemicals, structures, or weather events. The word carries a serious, evaluative connotation — it implies not just potential for harm but a considered judgment about how much. Related forms include the adjective "dangerous" and the adverb "dangerously." For writers seeking precision in legal or scientific prose, "dangerousness" offers a concise way to treat danger as a measurable quality.
nounThe quality or state of being dangerous; the degree to which someone or something is likely to cause harm or injury.
- The quality of being likely to cause harm, injury, or loss.
- (Law) A formally assessed propensity of a person to pose a threat to others, used in decisions about bail, sentencing, or civil commitment.
"The court weighed the dangerousness of the defendant before setting bail."
"Engineers underestimated the dangerousness of the unstable cliff face."
"Psychiatrists were asked to evaluate the patient's dangerousness before release."
In many US courts, a defendant's "dangerousness" isn't a vague impression — it's a formal legal finding that can decide whether they walk free or stay behind bars.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of dangerousness
Dangerousness derives from "dangerous," formed from the Middle English and Old French noun "danger," which itself traces back through Vulgar Latin *dominarium to Latin dominus, meaning "lord" or "master" — originally suggesting power over someone rather than peril. The suffix "-ness" was added to convert the adjective into an abstract noun denoting a quality. Cognates within English include "danger," "endanger," and "dangerously." The word entered written English alongside its parent adjective in the late medieval period, with established use by early modern times.
Related word forms
How dangerousness is actually used
Formal and somewhat technical in register; ordinary speech usually prefers "how dangerous something is." Especially common in legal, psychiatric, and risk-assessment contexts.
Easily confused with dangerousness
"Danger" is the possibility of harm itself, while "dangerousness" is the quality of being likely to cause that harm.
"Dangerously" is an adverb describing how something is done, whereas "dangerousness" is a noun naming a quality.