A Quick and Simple Dictionary

gun

1. Noun.  (military) A cannon with relatively long barrel, operating with relatively low angle of fire, and having a high muzzle velocity. JP 1-02.
2. Noun.  (military) A cannon with a 6-inch/155mm minimum nominal bore diameter and tube length 30 calibers or more. See also: howitzer; mortar. JP 1-02.
3. Noun.  A very portable, short arm, for hand use; a bullet or projectile-firing ; handgun, revolver, pistol, Derringer, zipgun, so forth.
4. Noun.  A less portable, long arm; bullet or projectile firing; rifle, either manual, automatic or semi-automatic; a musket or shotgun.
5. Noun.  Any implement designed to fire a projectile from a tube, even if it is not a firearm, e.g., air-pressure pellet gun, air rifle, BB gun; or, a home-made firearm such as a potato gun.
6. Noun.  Any device or tool that projects a substance in a superficially similar fashion to a firearm, e.g., nail gun, squirt gun, spray gun, grease gun.
7. Noun.  A device or tool shaped like a pistol and operated in similar fashion by pulling a trigger with the index finger, e.g., rivet gun, screw gun, price-label gun.
8. Noun.  (surfing) A long surfboard designed for surfing big waves (not the same as a longboard, a gun has a pointed nose and is generally a little narrower).
9. Noun.  (context, cellular automata) A pattern that "fires" out other patterns.
10. Noun.  (colloquial, usually plural) Biceps.
11. Verb.  (italbrac, with “down”) To shoot someone or something, usually with a firearm.
12. Verb.  To speed something up.
13. Verb.  To offer vigorous support to a person or cause.
14. Verb.  To seek to attack someone; to take aim at someone.
15. Verb.  To practice fowling or hunting small game; chiefly in participial form: ''to go gunning''..
16. Adjective.  (Australia, slang) Very good or skilful.[http://www.aussieslang.com/slang/australian-slang-g.asp?page=2].