- 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
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- 2the gas [singular] = gas pedal Step on the gas, we're late.
- 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 greenhouse gas
- 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 coal gas, natural gas
- 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 laughing gas
- 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 CS gas, mustard gas, nerve gas, tear gas fun
- 7[singular] a person or an event that is fun The party was a real gas.
- 8[uncountable] air that you swallow with food or drink; gas that is produced in your stomach or intestines that makes you feel uncomfortable Idioms
in vehicle
to lose energy and enthusiasm and stop doing something, or do it less well
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