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Definition proof
Etymology
From Middle English proof, borrowed from Old French prove, from Late Latin proba (“a proof”), from Latin probare (“to prove”); see prove; compare also the doublet probe.
Noun
proof (countable and uncountable, plural proofs)
- (countable) An effort, process, or operation designed to establish or discover a fact or truth; an act of testing; a test; a trial.
- (uncountable) The degree of evidence which convinces the mind of any truth or fact, and produces belief; a test by facts or arguments which induce, or tend to induce, certainty of the judgment; conclusive evidence; demonstration.
- The quality or state of having been proved or tried; firmness or hardness which resists impression, or does not yield to force; impenetrability of physical bodies.
- (obsolete) Experience of something.
- (uncountable, obsolete) Firmness of mind; stability not to be shaken.
- (countable, printing) A proof sheet; a trial impression, as from type, taken for correction or examination.
- (countable, logic, mathematics) A sequence of statements consisting of axioms, assumptions, statements already demonstrated in another proof, and statements that logically follow from previous statements in the sequence, and which concludes with a statement that is the object of the proof.
- (countable, mathematics) A process for testing the accuracy of an operation performed. Compare prove, transitive verb, 5.
- (obsolete) Armour of excellent or tried quality, and deemed impenetrable; properly, armour of proof.
- (US) A measure of the alcohol content of liquor. Originally, in Britain, 100 proof was defined as 57.1% by volume (no longer used). In the US, 100 proof means that the alcohol content is 50% of the total volume of the liquid; thus, absolute alcohol would be 200 proof.
Adjective
proof (comparative more proof, superlative most proof)
- Used in proving or testing.
- Firm or successful in resisting.
- (of alcoholic liquors) Being of a certain standard as to alcohol content.
Verb
proof (third-person singular simple present proofs, present participle proofing, simple past and past participle proofed)
Results 202 Words with the letters PROOF
13 letter words with the letters PROOF ↑
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You can also try words with the phrase PROOF, words starting with the letters PROOF, or words ending in the letters PROOF.
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