noun:a state of matter consisting of particles that are far apart and move freely, having neither a fixed shape nor a fixed volume
When you release the valve, the gas escapes and fills the room.
noun:short for gasoline, a fuel used in motor vehicles
We need to stop at the next station to fill up the car with gas.
verb:to poison or kill with gas
During World War I, soldiers were sometimes gassed in the trenches.
