A gun mounted on a pivot or revolving carriage, so as to turn in any direction.

A contract killer.

(mathematics) In the Conway's Game of Life cellular automaton, any pattern that "fires" out gliders.

plural of tattoo gun

(informal) A tattoo machine.

(chiefly historical) A very large shotgun used in the 19th and early 20th centuries for shooting large numbers of waterfowl for commercial harvesting operations and private sport.

(historical) A firearm that has a needle-like firing pin.

A firearm, such as a shotgun or rifle, which is fired while braced against the shoulder.

A person who is employed as an armed guard, enforcer, or mercenary and who is prepared to use gunplay or similar violent methods in order to assert the interests of his or her employer.

plural of nail gun