Big gun has 2 different meanings across 1 category:
Noun
Noun
1
an important influential person
"he thinks he's a big shot"
"she's a big deal in local politics"
"the Qaeda commander is a very big fish"
2
A large artillery gun or one of the largest-caliber naval guns (as on a battleship).
Example Sentences
"he thinks he's a big shot"
noun
"she's a big deal in local politics"
noun
"the Qaeda commander is a very big fish"
noun
Broader Terms (hypernyms)
Narrower Terms (hyponyms)