Meaning of “smoking gun” in the English Dictionary

american-english dictionary

"smoking gun" in American English

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smoking gunnoun [ C ]

us /ˈsmoʊ·kɪŋ ˈɡʌn/

information that proves who committed a crime:

The tapes provided prosecutors with the smoking gun they needed.

(Definition of “smoking gun” from the Cambridge Academic Content Dictionary © Cambridge University Press)

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