I UK [ɡæs] / US noun
Word forms "gas":
singular gas plural gasses
Differences between British and American English: gas:
In the UK, gas usually refers to a clear substance like air that is burned to cook food or to heat your house: a gas boiler. Gas can also have this meaning in the US, but when American speakers say gas they are usually referring to a type of liquid fuel that is used to produce power in cars: We'd better get gas on our way out of town. In the UK, you call this fuel petrol.
1) [countable/uncountable] science a substance such as air that is neither a solid nor a liquid

regulations to cut the emissions of gases such as carbon dioxide

They detected high levels of radon gas in the building.

a) [uncountable] a gas burned as fuel, for example to heat your house or cook food

a gas cooker/heater/boiler

She couldn't pay her gas bill.

Can you smell gas?

gas mark 3/4 etc (= a measurement of the temperature of an oven):

Heat the oven to gas mark 6.

b) [uncountable] a gas used for harming or killing people, or for affecting their behaviour

Police used gas to disperse the crowd.

A nerve gas attack left hundreds injured.

c) [uncountable] a gas given to people before an operation to make them sleep, or during medical treatment so that they will feel less pain
d) [uncountable] mainly American wind produced inside your body by your stomach
2) [uncountable] American petrol
get gas:

We need to get some gas before we leave town.

someone/something is a gasspoken used for saying that someone/something makes you laugh a lot

II UK [ɡæs] / US verb
Word forms "gas":
present tense I/you/we/they gas he/she/it gases present participle gassing past tense gassed past participle gassed
1) [transitive] to attack or kill someone by making them breathe a poisonous gas
2) [intransitive] informal to talk a lot about unimportant things

English dictionary. 2014.

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