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definition of the word gas

by the Wiktionnary

From Dutch gas, probably from Ancient Greek χάος (khaos), chasm, void).

Singular
gas

Plural
countable and uncountable; gases

gas (countable and uncountable; plural gases)

  1. (uncountable, chemistry) Matter in a state intermediate between liquid and plasma that can be contained only if it is fully surrounded by a solid (or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly.
    A lot of gas had escaped from the cylinder
  2. (countable, chemistry) A chemical element or compound in such a state.
    The atmosphere is made up of a number of different gases
  3. (uncountable) An inflammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating or electricity generation.
    Gas-fired power stations have largely replaced coal-burning ones.
  4. (US) Methane or other waste gases trapped in one's belly as a result of the digestive process. My tummy hurts so bad, I have gas.
  5. (slang) A humorous event or person.
    He is such a gas!
  6. (baseball) A fastball.
    The closer threw him nothing but gas.


Definition from Wiktionary
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