Sense: 1-3, 6-9
|Origin:||Greek khaos 'empty space'; CHAOS|
gas1 S1 W2 plural gases or gasses
1 [uncountable and countable]HC
a substance such as air, which is not solid or liquid, and usually cannot be seen:
a cloud of toxic gas
a gas cylinder/bottle (=for storing gas)➔ greenhouse gas
a clear substance like air that is burned for heating or cooking
Can you light the gas for me?
The explosion was caused by a gas leak from the water heater.
3 British English
a measurement of the temperature of a gas oven
4 [uncountable] American EnglishTT also gasoline
a liquid made from petroleum, used mainly for producing power in the engines of cars, trucks etc [= petrol British English]
I probably spend over $200 a month on gas.
The mechanic found a hole in the gas tank.
5 American English
the gas pedal of a car [= accelerator]:
We stepped on the gas (=pushed down the gas pedal and made the car go faster) and sped away.
a clear substance like air that is used for medical reasons, for example to make people feel less pain or make them sleep during an operation: ➔ laughing gas
an anaesthetic gas
a type of gas used as a weapon, because it harms or kills people when they breathe it in: ➔ nerve gas, poison gas, tear gas
8 [uncountable] American English informalMID
the condition of having a lot of air in your stomach [= wind British English]
9 American English old-fashioned spoken
something that is fun and makes you laugh a lot