An example of proof is someone returning to eat at the same restaurant many times showing they enjoy the food.
- the act or process of proving; a testing or trying of something
- anything serving or tending to establish the truth of something, or to convince one of its truth; conclusive evidence
- the establishment of the truth of something: to work on the proof of a theory
- a test or trial of the truth, worth, quality, etc. of something: the proof of the pudding is in the eating
- the quality or condition of having been tested or proved
- Obs. tested or proved strength, as of armor
- the relative strength of an alcoholic liquor with reference to the arbitrary standard for proof spirit
- this standard, taken as 100 proof
- Engraving a trial impression taken from a plate, block, or stone
- Law all the facts, admissions, and conclusions drawn from evidence which together operate to determine a verdict or judgment
- Math. a process for checking the correctness of a computation, as, in a subtraction problem, by adding the difference to the subtrahend to get the minuend
- Numismatics any of a limited number of coins of a new issue, struck with special care
- Photog. a trial print of a negative
- Printing an impression of composed type taken for checking errors and making changes
Origin of proofMiddle English profe ; from Old French prueve ; from Late Latin proba ; from Classical Latin probare: see probe
- of tested and proved strength
- impervious or invulnerable to; able to resist, withstand, etc.: with against: proof against criticism
- used in proving or testing
- of standard strength: said of alcoholic liquors
- to make a proof of
- to make resistant or impervious to something
- impervious to: waterproof
- protected from or against: foolproof, rustproof
- resistant to, unaffected by: fireproof
Origin of -proof; from proof
- The evidence or argument that compels the mind to accept an assertion as true.
- a. The validation of a proposition by application of specified rules, as of induction or deduction, to assumptions, axioms, and sequentially derived conclusions.b. A statement or argument used in such a validation.
- a. Convincing or persuasive demonstration: was asked for proof of his identity; an employment history that was proof of her dependability.b. The state of being convinced or persuaded by consideration of evidence.
- Determination of the quality of something by testing; trial: put one's beliefs to the proof.
- Law a. The establishment of the truth or falsity of an allegation by evidence.b. The evidence offered in support of or in contravention of an allegation.
- The alcoholic strength of a liquor, expressed by a number that is twice the percentage by volume of alcohol present.
- Printing a. A trial sheet of printed material that is made to be checked and corrected. Also called proof sheet.b. A trial impression of a plate, stone, or block taken at any of various stages in engraving.
- a. A trial photographic print.b. Any of a limited number of newly minted coins or medals struck as specimens and for collectors from a new die on a polished planchet.
- Archaic Proven impenetrability: “I was clothed in Armor of proof” (John Bunyan).
- Fully or successfully resistant; impervious. Often used in combination: waterproof watches; a fireproof cellar door.
- Of standard alcoholic strength: proof liquor.
- Used to proofread or correct typeset copy: a proof copy of the manuscript.
verbproofed, proof·ing, proofs
- Printing a. To make a trial impression of (printed or engraved matter).b. To proofread (copy).
- a. To activate (dormant dry yeast) by adding water.b. To work (dough) into proper lightness.
- To treat so as to make resistant: proof a fabric against shrinkage.
- Printing To proofread.
- To become properly light for cooking: The batter proofed overnight.
Origin of proofMiddle English prove, preve, from Anglo-Norman prove and from Old French prueve, both from Late Latin proba, from Latin probāre, to prove; see prove.
(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 doesn't yield to force; impenetrability of physical bodies.
- (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.
- (US) A measure of the alcohol content of liquor. Originally, in Britain, 100 proof was defined as 57.1% by volume (not used anymore). In the US, 100 proof means that the alcohol content is 50% of the total volume of the liquid, and thus, absolute alcohol would be 200 proof.
(comparative more proof, superlative most proof)
- Used in proving or testing.
- a proof load; a proof charge
- Firm or successful in resisting.
- proof against harm
- waterproof; bombproof.
- (of alcoholic liquors) Being of a certain standard as to alcohol content.
(third-person singular simple present proofs, present participle proofing, simple past and past participle proofed)
- (intransitive, colloquial) To proofread.
- To make resistant, especially to water.
- To knead, as in bread dough.
- Often used as the second part of a combined form (such as bullet-proof) rather than as a true suffix (as in waterproof)
proof - Computer Definition
proof - Legal Definition