proof
IPA: prˈuf
noun
- (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.
- (numismatics) A limited-run high-quality strike of a particular coin, originally as a test run, although nowadays mostly for collectors' sets.
- (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.
- The 98th sura (chapter) of the Qur'an.
verb
- (transitive, intransitive, colloquial) To proofread.
- (transitive) To make resistant, especially to water.
- (transitive, firearms) To test-fire with a load considerably more powerful than the firearm in question's rated maximum chamber pressure, in order to establish the firearm's ability to withstand pressures well in excess of those expected in service without bursting.
- (transitive, cooking) To allow yeast-containing dough to rise.
- (transitive, cooking) To test the activeness of yeast.
adjective
- Used in proving or testing.
- Firm or successful in resisting.
- (of alcoholic liquors) Being of a certain standard as to alcohol content.
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Examples of "proof" in Sentences
- A proof taken of the whole galley at once is called a _galley proof_.
- I. i.217 (15,1) in strong proof] In chastity _of proof_, as we say in armour _of proof_.
- That is so funny about your selecting the squirrel proof feeder, and I can agree, some are more *proof* than others!
- An apparently intact hymen is valued in some cultures as proof of virginity in a bride; this proof, however, is not accurate.
- The proof of this lies in the words _ex ou_ just below; not _ex ôn_ (_ouranôn_) but _ex ou_ (_politeumatos_): I can find _no proof_ of the assertion (Moulton's
- But I say, by authority of the Master, that _the highest proof, the absolute proof, the perfect proof_, of the FACTS as to _who God is, and what he does_, and the
- Here, then, we are told that proof of the occasional transmission of mutilations would be sufficient to establish the fact, but on p. 267 we find that no single fact is known which really proves that acquired characters can be transmitted, "_for the ascertained facts which seem to point to the transmission of artificially produced diseases cannot be considered as proof_" [Italics mine.]
- The strength of spirit stronger than _proof_ or _over proof_, as it is termed by the revenue officers, is indicated by the bulk of water necessary to reduce a given volume of it, to the legal standard spirit, denominated _proof_ -- namely; if one gallon of water be required to bring twenty gallons of brandy, rum, or any other spirit, to proof, that spirit is said to be _1 to 20 over proof_.
- However, when it comes to attempting to understand the deep structure of classical proof systems (and in particular, when two derivations that differ in some superficial syntactic way are really different ways to represent the one underlying ˜proof™) it is enlightening to think of classical logic as formed by a basic substructural logic, in which extra structural rules are imposed as additions.
- No experimental proof has hitherto been obtained that stimulation of the cerebral organs lying above the vaso-motor centre, and which include those possessing the function of thought, ever paralyzes this centre; but, as it is only by such paralysis that cerebral conditions can induce dilatation of blood-vessels, it must follow that no _experimental proof_ at present exists that stimulation of the brain ever does cause such dilatation -- that is, ever does become a cause of hæmorrhage.
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