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smoking gun

noun

Simple Definition of smoking gun

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

Source: Merriam-Webster's Learner's Dictionary

Full Definition of smoking gun

  1. :  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.



1974

First Known Use of smoking gun

1974


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