What is the meaning of gas?

noun

• The state of matter distinguished from the solid and liquid states by: relatively low density and viscosity; relatively great expansion and contraction with changes in pressure and temperature; the ability to diffuse readily; and the spontaneous tendency to become distributed uniformly throughout any container.
  • synonyms: gaseous state
• A fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely.
• A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines.
  • synonyms: gasoline, gasolene, petrol
• A state of excessive gas in the alimentary canal.
  • synonyms: flatulence, flatulency
• A pedal that controls the throttle valve.
  • usage: "he stepped on the gas"
  • synonyms: accelerator, accelerator pedal, gas pedal, throttle, gun
• A fossil fuel in the gaseous state; used for cooking and heating homes.
  • synonyms: natural gas

verb

• Attack with gas; subject to gas fumes.
  • usage: "The despot gassed the rebellious tribes"
• Show off.
  • synonyms: boast, tout, swash, shoot a line, brag, blow, bluster, vaunt, gasconade