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English definition of “gas”

gas

noun uk   /ɡæs/ us  

gas noun (AIR SUBSTANCE)

B2 [C or U] a substance in a form like air that is neither solid nor liquid: Oxygen, hydrogen and nitrogen are all gases. poisonous/inflammable/toxic gas A2 [C or U] a substance in a form like air that is used as a fuel for heating and cooking: Do you prefer cooking with electricity or gas?UK A leak in the gas mains (= pipes) caused a major explosion. a gas-fired power station [U] informal a substance in a form like air used for medical purposes to prevent people feeling pain or being conscious during an operation: I had/was given gas when I got my wisdom teeth out. [U] mainly US for wind noun: Beer gives me gas.

gas noun (LIQUID FUEL)

A2 [U] US for petrol: I'll stop and get some gas - we're running low. a gas tank/pump the gas [S] US the part of a car that you push with your foot to make it go faster: Step on the gas (= drive faster)!

gas noun (ENJOYABLE SITUATION)

[S] mainly US informal a funny or enjoyable situation: Some kids put on a show for the moms and dads, - it was a gas.

gas

verb uk   /ɡæs/ (-ss-) us  

gas verb (POISON)

[T] to kill or injure a person by making them breathe poisonous gas: Hundreds of thousands of soldiers were gassed in the First World War.

gas verb (TALK)

[I] old-fashioned informal to talk for a long time about things that are not important: Susan came round and we sat gassing for hours.
Phrasal verbs
(Definition of gas from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of gas?
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