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English definition of “gas”

gas

noun [C/U] (MATTER)   /ɡæs/
science a form of matter that is neither solid nor liquid and can increase in size to fill any container science Gas is also the usual word used to talk about natural gas. Gas is also the feeling that you sometimes get after eating a lot and the air such eating produces in your stomach.
(Definition of gas noun (MATTER) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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