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English definition of “gas”

gas

noun (AIR SUBSTANCE)    /ɡæs/
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 gasThe state of matter 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 FuelsPetroleum products especially when used as fuel [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.SurgeryMedicine in different forms [U] mainly US for wind noun: Beer gives me gas.Digestive disorders
(Definition of gas noun (AIR SUBSTANCE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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