- a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid)；a gaseous substance that cannot be liquefied by the application of pressure alone.
- kill or harm by exposure to gas；(of a storage battery or dry cell) give off gas
- very amusing or entertaining
verb: gas, 3rd person present: gases, gerund or present participle: gassing, past tense: gassed, past participle: gassed
noun: gas, plural noun: gases
- 1. a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid) hot balls of gas that become stars poisonous gases
- ▪ a gaseous substance that cannot be liquefied by the application of pressure alone.
- ▪ a flammable gas used as a fuel cooking is done by bottled gas
- ▪ a gaseous anaesthetic such as nitrous oxide, used in dentistry.
- ▪ gas or vapour used as a poisonous agent in warfare gas was one of the most dreaded weapons of the war
- ▪ gas generated in the alimentary canal; flatulence.
- ▪ an explosive mixture of firedamp with air.
- 2. North American short for gasoline
- ▪ used in reference to power or the accelerator of a car I ordered my friend to step on the gas
- 3. informal an entertaining or amusing person or situation the party would be a gas
- ▪ Irish enjoyment, amusement, or fun it was great gas in the club last night
- 1. kill or harm by exposure to gas my son was gassed at Verdun
- ▪ (of a storage battery or dry cell) give off gas the maintenance-free charger controls the input without inducing gassing
- 2. informal talk excessively about trivial matters I thought you'd never stop gassing
- 3. North American informal fill the tank of (a motor vehicle) with petrol after gassing up the car, he went into the restaurant
- 1. Irish informal very amusing or entertaining Ruthie, that's gas—you're a gem