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

'Gas' in other languages