Definition of Gas

Noun: gas (gases,gasses) gas

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
- gaseous state
A fluid in the gaseous state having neither independent shape nor volume and being able to expand indefinitely
[N. Amer] A volatile flammable mixture of hydrocarbons (hexane and heptane and octane etc.) derived from petroleum; used mainly as a fuel in internal-combustion engines
- gasoline [N. Amer], gasolene [N. Amer], petrol [Brit]
A state of excessive gas in the alimentary canal
- flatulence, flatulency
[N. Amer] A pedal that controls the throttle valve
"he stepped on the gas";
- accelerator, accelerator pedal, gas pedal [N. Amer], throttle, gun
A fossil fuel in the gaseous state; used for cooking and heating homes
- natural gas

Verb: gas (gassed,gassing,gases) gas

Attack with gas; subject to gas fumes
"The despot gassed the rebellious tribes"
Show off
- boast, tout, swash, shoot a line, brag, blow, bluster, vaunt, gasconade [archaic], skite [Austral, NZ]
Talk socially without exchanging too much information
"the men were sitting in the cafe and gassing";
- chew the fat, shoot the breeze [N. Amer], chat, confabulate, confab, chitchat, chit-chat, chatter, chaffer, natter, gossip, jaw, claver [UK, dialect], visit, gab

Noun: GA

A state in southeastern United States; one of the Confederate states during the American Civil War
- Georgia, Empire State of the South, Peach State
The first known nerve agent, synthesized by German chemists in 1936; a highly toxic combustible liquid that is soluble in organic solvents and is used as a nerve gas in chemical warfare
- tabun