Meaning : The act of firing weapons or artillery at an enemy.
Example :
Hold your fire until you can see the whites of their eyes.
They retreated in the face of withering enemy fire.
Synonyms : fire
Meaning : The act of discharging a gun.
Synonyms : discharge, firing off
Meaning : The act of setting something on fire.
Synonyms : ignition, inflammation, kindling, lighting
Meaning : The termination of someone's employment (leaving them free to depart).
Synonyms : discharge, dismissal, dismission, liberation, release, sack, sacking