dangerous, hazardous, precarious, perilous, risky mean bringing or involving the chance of loss or injury. dangerous applies to something that may cause harm or loss unless dealt with carefully.

HAZARDOUS definition: full of risk; perilous; risky. See examples of hazardous used in a sentence.

Add to word list dangerous and involving risk, especially to someone's health: hazardous industries / materials / substances (Definition of hazardous from the Cambridge Business English Dictionary © …

1. to risk; to be prepared to do (something, the result of which is uncertain).

Something that is hazardous is dangerous, especially to people's health or safety. They have no way to dispose of the hazardous waste they produce.

hazardous - WordReference English dictionary, questions, discussion and forums. All Free.

Hazardous refers to anything that presents a potential source of danger, harm, or risk to the health, safety, or environment. This could involve objects, substances, activities, or situations that could …

Jan 14, 2026 · Adjective hazardous (comparative more hazardous, superlative most hazardous) Risky; dangerous; with the nature of a hazard.

Never throw hazardous products away with your regular trash. Store all hazardous products in their original containers with lids fastened securely. Learn more about proper disposal methods.

Hazardous definition: Marked by danger; perilous.