gases

n 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 n a fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely n a volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines n a state of excessive gas in the alimentary canal n a pedal that controls the throttle valve n a fossil fuel in the gaseous state; used for cooking and heating homes v attack with gas; subject to gas fumes v show off