• 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 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
• noun:   a state of excessive gas in the alimentary canal
• 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 pedal that controls the throttle valve

  Example: "He stepped on the gas"

• verb:   attack with gas; subject to gas fumes

  Example: "The despot gassed the rebellious tribes"

• verb:   show off

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