Apart from physical dangers (falls, scalds, and so on), being ' at home ' may mean being lonely, isolated and afraid. 1. liability or exposure to harm or injury; risk; peril. 2. an instance or cause of peril; menace. 3. Obs. power; jurisdiction; domain. [uncountable] the possibility of something happening that will injure, harm or kill somebody, or damage or destroy something. Danger! Keep Out! Firefighters face danger every day. in danger Children's lives are in danger every time they cross this road. They found themselves in grave danger. Danger (also risk or peril) is the possibility of something bad happening. A situation in which there is a risk of something bad happening, is called dangerous, risky or perilous. People often take risks, or do things that might hurt them. An example of this is crossing the road without looking carefully. DANGERS definition: plural of danger. See examples of dangers used in a sentence. The danger of shipwreck is much greater in fog. The future of our planet is in danger if we continue to plunder it as we do. The patient is now out of danger. There is some danger of low level radiation. Today the government issued a warning about the dangers of sunbathing. The meaning of DANGER is exposure or liability to injury, pain, harm, or loss. How to use danger in a sentence. Noun danger (countable and uncountable, plural dangers) Exposure to likely harm; risk of death or serious injury. Synonyms for DANGERS: threats, risks, perils, hazards, menaces, pitfalls, troubles, imminences; Antonyms of DANGERS: safeguards, protections, guards, wards, shields, shelters, harbors, refuges Here is a list of possible dangers associated with the procedure. We believe it poses a serious danger to our national security.