The term "gat" has multiple meanings, depending on the context. Here are the different definitions found in the search results:

• Noun (1): An archaic term for a hole or gate, probably derived from Dutch or Old English.
• Noun: A short form of "Gatling gun," a type of machine gun invented in the 19th century.
• Noun: A slang term for any type of gun, usually a pistol, used in old westerns and gangster slang.
• Verb: A slang term meaning "to shoot someone with a pistol or other handheld firearm".
• Noun: A New Zealand slang term for a guitar.
• Noun: A vulgar term for the anus.
• Noun: A slang term for a gun, particularly in the United States.

It is important to note that the term "gat" is not commonly used in modern English and may be considered outdated or inappropriate in some contexts.