American English

Definition of gas noun from the Oxford Advanced American Dictionary



    (pl. gases or ()gasses)
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    in vehicle
  1. 1(also gasoline) [uncountable] a liquid obtained from petroleum, used as fuel in car engines, etc. We need to stop for gas. a gas station a gas pump to fill up the gas tank
  2. 2the gas [singular] = gas pedal Step on the gas, we're late.
  3. not solid/liquid
  4. 3[countable, uncountable] any substance like air that is neither a solid nor a liquid; for example, hydrogen and oxygen are both gases Air is a mixture of gases. CFC gases a gas bottle/cylinder (= for storing gas) see also greenhouse gas
  5. 4[uncountable] a particular type of gas or mixture of gases used as fuel for heating and cooking a gas stove/furnace a gas explosion/leak gas heat see also coal gas, natural gas
  6. 5[uncountable] a particular type of gas used during a medical operation, to make the patient sleep or to make the pain less an anesthetic gas Did you have gas or an injection? see also laughing gas
  7. 6[uncountable] a particular type of gas used in war to kill or injure people, or used by the police to control people a gas attack see also CS gas, mustard gas, nerve gas, tear gas
  8. fun
  9. 7[singular] a person or an event that is fun The party was a real gas.
  10. in stomach
  11. 8[uncountable] air that you swallow with food or drink; gas that is produced in your stomach or intestines that makes you feel uncomfortable
  12. Idioms
    run out of gas (informal)
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    to lose energy and enthusiasm and stop doing something, or do it less well
See the Oxford Advanced Learner's Dictionary entry: gas