The noun gas has 6 senses (first 5 from tagged texts)
1. (98) gas, gaseous state -- (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)
2. (95) gas -- (a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely)
3. (7) gasoline, gasolene, gas, petrol -- (a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines)
4. (1) flatulence, flatulency, gas -- (a state of excessive gas in the alimentary canal)
5. (1) accelerator, accelerator pedal, gas pedal, gas, throttle, gun -- (a pedal that controls the throttle valve; "he stepped on the gas")
6. natural gas, gas -- (a fossil fuel in the gaseous state; used for cooking and heating homes)
Overview of verb gas
The verb gas has 2 senses (first 1 from tagged texts)
1. (1) gas -- (attack with gas; subject to gas fumes; "The despot gassed the rebellious tribes")