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

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

Recent Examples on the Web

Turley blasts the media for promising for over a year bombshell, bombshell, bombshell, smoking gun. Fox News, "Hannity: President Trump is on a tear, enacting his agenda," 4 Apr. 2018

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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Time Traveler for smoking gun

The first known use of smoking gun was in 1974

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More Definitions for smoking gun

smoking gun

noun

English Language Learners Definition of smoking gun

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

More from Merriam-Webster on smoking gun

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lying above or upon

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