gas - definition and synonyms


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  1. 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.

     Synonyms and related words
    1. a.
      [uncountable] a gas burned as fuel, for example to heat your house or cook food

      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.

    2. b.
      [uncountable] a gas used for harming or killing people, or for affecting their behaviour
       Synonyms and related words
    3. 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
    4. d.
      [uncountable] mainly American wind produced inside your body by your stomach
  2. 2
    [uncountable] American petrol
    get gas:

    We need to get some gas before we leave town.