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Definition of “proof” - English Dictionary

"proof" in American English

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proofnoun

 us   /pruf/
  • proof noun (FACTS)

[U] facts or documents that can be used to show that something is true: You will need to have proof of citizenship in order to get a passport.
  • proof noun (PRINTED COPY)

[C] a printed copy of written material that is examined and corrected before final copies are printed: Page proofs went out yesterday to all the contributors to the book.
  • proof noun (CALCULATION)

mathematics [C] the calculations that show how the solution to a mathematical problem or equation was reached
  • proof noun (AMOUNT OF ALCOHOL)

[U, not gradable] a measure of the percentage of alcohol in an alcoholic drink, equal to twice the actual percentage of alcohol: Liquor that is 50 proof is 25% alcohol.
(Definition of proof from the Cambridge Academic Content Dictionary © Cambridge University Press)







"proof" in British English

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proofnoun

uk   /pruːf/  us   /pruːf/
  • proof noun (SHOWING TRUTH)

B2 [C or U] a fact or piece of information that shows that something exists or is true: [+ that] Do they have any proof that it was Hampson who stole the goods? I have a suspicion that he's having an affair, though I don't have any concrete (= definite) proof. If anyone needs proof of Andrew Davies' genius as a writer, this novel is it. "How old are you?" "21." "Do you have any proof on you?" Keep your receipt as proof of purchase.

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proofadjective [after noun]

uk   /pruːf/  us   /pruːf/

proofverb [T]

uk   /pruːf/  us   /pruːf/

-proofsuffix

uk   / -pruːf/  us   / -pruːf/
(Definition of proof from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

"proof" in Business English

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proofnoun [C usually plural]

uk   us   /pruːf/ (also proof copy)
a printed copy of something that is examined and corrected before the final copies are printed: We still had time to correct the proofs of the brochure.
(Definition of proof from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of proof?
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