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gas

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noun gas pronunciation in American English /ɡæs/ 
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singulargas
pluralgasses
 
  1. 1
    [uncountable] American liquid fuel that is used for producing power in the engines of cars. The British word is petrol
    get gas:

    We need to get some gas before we leave town.

  2. 2
    [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 for this sense of gas
    1. a.
      [uncountable] a gas burned as fuel, for example to heat your house or cook food

      a gas stove/heater/boiler

      She couldn't pay her gas bill.

      Can you smell gas?

      Synonyms and related words for this sense of gas
    2. b.
      [uncountable] a gas used for harming or killing people, or for affecting their behavior

      Police used gas to disperse the crowd.

      A nerve gas attack left hundreds injured.

      Synonyms and related words for this sense of gas
 

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