Definitions from Wiktionary ( )

▸ noun:  A device for projecting a hard object very forcefully; a firearm or cannon.
▸ noun:  A very portable, short firearm, for hand use, which fires bullets or projectiles, such as a handgun, revolver, pistol, or Derringer.
▸ noun:  A less portable, long firearm that fires bullets or projectiles; a rifle, either manual, automatic or semi-automatic; a flintlock, musket or shotgun.
▸ noun:  (military) A cannon with relatively long barrel, operating with relatively low angle of fire, and having a high muzzle velocity.
▸ noun:  (military) A cannon with a 6-inch/155mm minimum nominal bore diameter and tube length 30 calibers or more. See also: howitzer; mortar.
▸ noun:  (figurative) A firearm or cannon used for saluting or signalling.^(21-gun salute)
▸ noun:  A device operated by a trigger and acting in a manner similar to a firearm.
▸ noun:  Any implement designed to fire a projectile from a tube.
▸ noun:  A device or tool that projects a substance.
▸ noun:  A device or tool that applies something rather than projecting it.
▸ 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).
▸ noun:  (cellular automata) A pattern that "fires" out other patterns.
▸ noun:  (colloquial, metonymically) A person who carries or uses a rifle, shotgun or handgun.
▸ noun:  (television) An electron gun.
▸ noun:  (colloquial, usually in the plural) The biceps.
▸ noun:  (nautical, in the plural) Violent blasts of wind.
▸ noun:  (colloquial) An expert.
▸ noun:  (Australia, slang) Someone excellent, surpassingly wonderful, or cool.
▸ verb:  (transitive) To cause to speed up.
▸ verb:  (informal) To offer vigorous support to (a person or cause).
▸ verb:  (informal) (gunning for something or gunning to do something) make a great effort.
▸ verb:  To seek to attack someone; to take aim at someone; used with for.
▸ verb:  To practice fowling or hunting small game; chiefly in participial form: to go gunning.
▸ verb:  (transitive, intransitive, US, prison slang, of a male prisoner) Synonym of gun down (“to masturbate while making sustained eye contact with someone — typically a female prison officer — as a form of intimidation”).
▸ noun:  (obsolete, slang) A magsman or street thief.
▸ noun:  A Gbe language spoken in parts of Benin and Nigeria.
▸ verb:  Nonstandard spelling of going to.

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