Definition of Smoking gun

convicting proof (usually in a trial or crime)

Examples of Smoking gun in a sentence

Detective Marsh confronted the defendant with the smoking gun of his fingerprints being all over the murder weapon.  🔊

When the smoking gun was revealed to the jury, there was nothing left to do except convict the criminal of the crime.  🔊

After denying the affair for months, the wife presented the smoking gun of photos catching her husband in the act with his mistress.  🔊

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