smoking gun

noun

: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
There are no smoking guns in Jim’s investigation — only yearslong legal cases that hinge on technical details like the metal composition of a tiny bomb component. Alison Herman, Variety, 2 Jan. 2025 Some experts have said the public shouldn’t anticipate smoking guns that upend history. Alexis Simendinger, The Hill, 18 Dec. 2024 While all this is going on, Matty is — as always — sneaking around Jacobson-Moore, looking for the smoking gun that will prove Senior buried evidence against Wellbrexa. Noel Murray, Vulture, 12 Dec. 2024 But looking for the equivalent of a smoking gun in arguments about Shakespeare’s sexuality is a hollow pursuit. Will Tosh, TIME, 11 Oct. 2024 See all Example Sentences for smoking gun 

Word History

First Known Use

1974, in the meaning defined above

Time Traveler
The first known use of smoking gun was in 1974

Dictionary Entries Near smoking gun

Cite this Entry

“Smoking gun.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/smoking%20gun. Accessed 7 Jan. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!