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smoking gun

noun

Definition of smoking gun

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

See smoking gun defined for English-language learners

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Examples of smoking gun in a Sentence

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

First Known Use of smoking gun

1974

SMOKING GUN Defined for English Language Learners

smoking gun

noun

Definition of smoking gun for English Language Learners

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

Learn More about smoking gun

  1. See words that rhyme with smoking gun

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These similar words are not interchangeable

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Examples: smoking gun in a Sentence