Definition of "gas"
gas1
/ɡæs/
noun
countable and uncountable, plural gases or gasses
(uncountable, chemistry) Matter in an intermediate state between liquid and plasma that can be contained only if it is fully surrounded by a solid (or in a bubble of liquid, or held together by gravitational pull); it can condense into a liquid, or can (rarely) become a solid directly by deposition.
verb
third-person singular simple present gases or gasses, present participle gassing, simple past and past participle gassed
(transitive) To impregnate with gas.
gas2
/ɡæs/
noun
countable and uncountable, plural gases or gasses