- Proof is evidence or argument that forces someone to believe something as true.
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
- Obsolete 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