smoking gun: meaning, definition, pronunciation and examples
C1Formal; journalistic; legal.
Quick answer
What does “smoking gun” mean?
Conclusive physical evidence that proves a crime or wrongdoing has occurred, especially after a period of uncertainty or speculation.
Audio
Pronunciation
Definition
Meaning and Definition
Conclusive physical evidence that proves a crime or wrongdoing has occurred, especially after a period of uncertainty or speculation.
Any indisputable piece of evidence that serves as definitive proof for a claim, theory, or accusation, particularly one that resolves a mystery or controversy.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The idiom is equally understood and used in both varieties.
Connotations
Associated with detective stories, political scandals, and investigative journalism in both cultures.
Frequency
Slightly more frequent in American English due to its common use in legal and political contexts, but widely used in British English.
Grammar
How to Use “smoking gun” in a Sentence
[Subject] found/discovered/uncovered the smoking gun.The [evidence/document] is/was the smoking gun.There is no smoking gun to prove [claim].Vocabulary
Collocations
Usage
Meaning in Context
Business
Refers to documentary proof of fraud, embezzlement, or regulatory violation, e.g., 'The audit finally revealed the smoking gun in the accounting records.'
Academic
Used in historical or scientific discourse to describe a single piece of evidence that validates a major hypothesis, e.g., 'The fossil was the smoking gun for the theory of continental drift.'
Everyday
Used when discussing mysteries, scandals, or arguments where one piece of evidence settles the matter, e.g., 'The security camera footage was the smoking gun that proved who took the bike.'
Technical
In cybersecurity or forensics, refers to a log file, packet, or system artifact that definitively identifies an attacker or breach.
Vocabulary
Synonyms of “smoking gun”
Strong
Neutral
Weak
Vocabulary
Antonyms of “smoking gun”
Watch out
Common Mistakes When Using “smoking gun”
- Using it to mean just 'suspicion' or 'a clue' (it must be conclusive).
- Using it as an adjective without 'gun' (e.g., 'smoking evidence' is incorrect).
- Confusing it with 'smoking barrel', which is less idiomatic.
FAQ
Frequently Asked Questions
Yes. While originating from crime, it is now used metaphorically in any field (science, history, business) to mean the single piece of evidence that settles a dispute or proves a theory definitively.
A 'smoking gun' is direct, incontrovertible proof. 'Circumstantial evidence' is indirect and requires inference. A smoking gun leaves no room for reasonable doubt.
No. The phrase itself means 'conclusive evidence', so 'a smoking gun evidence' is redundant. Use 'a smoking gun' or 'smoking-gun evidence' (with a hyphen) as a compound modifier, e.g., 'a smoking-gun document'.
It originates from the image of a firearm that has just been discharged, with smoke still rising from the barrel. This would be unambiguous proof of who fired the shot. It became a popular metaphor in the late 19th/early 20th century, notably during the Watergate scandal in the 1970s.
Conclusive physical evidence that proves a crime or wrongdoing has occurred, especially after a period of uncertainty or speculation.
Smoking gun is usually formal; journalistic; legal. in register.
Smoking gun: in British English it is pronounced /ˈsməʊkɪŋ ɡʌn/, and in American English it is pronounced /ˈsmoʊkɪŋ ɡʌn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “Aha! moment”
- “the nail in the coffin (related but more final)”
- “the missing piece of the puzzle”
Learning
Memory Aids
Mnemonic
Imagine a detective story: the killer is caught holding a gun that is still SMOKING from being fired. That image is the ultimate, undeniable proof. The phrase freezes that moment of revelation.
Conceptual Metaphor
EVIDENCE IS A WEAPON / TRUTH REVEALED IS SMOKE FROM A GUN. The metaphor frames the process of discovery as a hunt where the ultimate goal is a weapon (evidence) that has just been used (the crime), with the smoke being the visible, lingering trace of the act.
Practice
Quiz
In which of the following situations is the term 'smoking gun' used correctly?