1.To set on fire; to kindle; as, to fire a house or chimney; to fire a pile.
2.To subject to intense heat; to bake; to burn in a kiln; as, to fire pottery.
3.To inflame; to irritate, as the passions; as, to fire the soul with anger, pride, or revenge. "Love had fired my mind."
4.To animate; to give life or spirit to; as, to fire the genius of a young man.
5.To feed or serve the fire of; as, to fire a boiler.
6.To light up as if by fire; to illuminate. "(The sun) fires the proud tops of the eastern pines."
7.To cause to explode; as, to fire a torpedo; to disharge; as, to fire a rifle, pistol, or cannon; to fire cannon balls, rockets, etc.
8.To drive by fire. (Obs.) "Till my bad angel fire my good one out."
10.To dismiss from employment, a post, or other job; to cause (a person) to cease being an employee; of a person. The act of firing is usually performed by that person's supervisor or employer. "You can't fire me! I quit!"
To fire up, 1.to light up the fires of, as of an engine; also, figuratively, to start up any machine.
2.to render enthusiastic; of people.