discharge a gun or other weapon in order to propel (a bullet or projectile)
he fired a shot at the retreating prisoners
they fired off a few rounds
dismiss (an employee) from a job
I had to fire men who've been with me for years
you're fired!
supply (a furnace, engine, etc.) with fuel
liquefied petroleum gas can fire room heaters
bake or dry (pottery, bricks, etc.) in a kiln
methane gas is being used to fire bricks at a nearby factory