- The most important or powerful person in an enterprise or field: The big guns for the prosecution were its expert witnesses.
- Something of the highest value or influence.
(plural big guns)
- (military) A large artillery gun or one of the largest-caliber naval guns (as on a battleship).
- (idiomatic, by extension, usually pluralized) A person, group, thing, or course of action that is powerful, influential, or particularly effective.
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