smoking gun

noun

Definition of smoking gun

: something that serves as conclusive evidence or proof (as of a crime or scientific theory)

Examples of smoking gun in a Sentence

  1. This document is the smoking gun that proves that he was lying.

Recent Examples of smoking gun from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'smoking gun.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of smoking gun

1974

in the meaning defined above

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SMOKING GUN Defined for English Language Learners

smoking gun

Definition of smoking gun for English Language Learners

  • : a piece of evidence that clearly proves who did something or shows how something happened


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