gas

1. (noun) Matter in a state intermediate 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. 2. (noun) A chemical element or compound in such a state. 3. (noun) A flammable gaseous hydrocarbon or hydrocarbon mixture (typically predominantly methane) used as a fuel, e.g. for cooking, heating, electricity generation or as a fuel in internal combustion engines in vehicles. 4. (noun) A hob on a gas cooker. 5. (noun) Methane or other waste gases trapped in one's belly as a result of the digestive process. 6. (noun) A humorous or entertaining event or person. 7. (noun) Frothy talk; chatter. 8. (noun) A fastball. 9. (noun) Arterial or venous blood gas. 10. (noun) Marijuana, typically of high quality. 11. (verb) To kill with poisonous gas. 12. (verb) To talk in a boastful or vapid way; chatter. 13. (verb) To impose upon by talking boastfully. 14. (verb) To emit gas. 15. (verb) To impregnate with gas. 16. (verb) To singe, as in a gas flame, so as to remove loose fibers.