gun-n; 4 Senses

Sense Number 1: weapon, armament, firearm (metaphoric also)

Examples:
In many states it is illegal to carry a concealed gun.
The battleship aimed its 16-inch guns at the approaching enemy ship.
The marines gave him a 21 gun salute.
The law firm has decided to bring in its big guns on that case.

Mappings:
WordNet 1.7 Sense Numbers: 1, 2, 7

Sense Number 2: person who is employed to use a gun

Examples:
He's a fast gun with a 22-caliber pistol.
The drug lord always had a couple of hired guns at his side.

Mappings:
WordNet 1.7 Sense Numbers: 3, 4

Sense Number 3: hand-operated pump

Examples:
Use a glue gun to glue those paper lanterns together.
They have several grease guns in their repair shop.

Mappings:
WordNet 1.7 Sense Numbers: 5

Sense Number 4: accelerator pedal (British?)

Examples:
He hit the gun and the car squealed tires as he roared off.

Mappings:
WordNet 1.7 Sense Numbers: 6