Definition of "Gas" :
noun: a pedal that controls the throttle valve
"He stepped on the gas."
noun: a state of excessive gas in the alimentary canal
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
noun: a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
noun: a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
noun: a fossil fuel in the gaseous state; used for cooking and heating homes
verb: show off
verb: attack with gas; subject to gas fumes
"The despot gassed the rebellious tribes."