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1. 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.
4. Determination of the quality of something by testing; trial: put one's beliefs to the proof.
5. 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.
6. The alcoholic strength of a liquor, expressed by a number that is twice the percentage by volume of alcohol present.
7. 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.
9. Archaic Proven impenetrability: "I was clothed in Armor of proof" (John Bunyan).
1. Fully or successfully resistant; impervious. Often used in combination: waterproof watches; a fireproof cellar door.
2. Of standard alcoholic strength: proof liquor.
3. Used to proofread or correct typeset copy: a proof copy of the manuscript.
v. proofed, proof·ing, proofs
1. 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.
3. To treat so as to make resistant: proof a fabric against shrinkage.
1. Printing To proofread.
2. To become properly light for cooking: The batter proofed overnight.

[Middle English prove, preve, from Anglo-Norman prove and from Old French prueve, both from Late Latin proba, from Latin probāre, to prove; see prove.]

proof′er n.


The verification that a breached lane is free of live mines by passing a mine roller or other mine-resistant vehicle through as the lead vehicle.
References in periodicals archive ?
Auto-Bake presents the Serpentine proofer continuous proofing system which provides an optimum humidity proofing environment and can be tailored to deliver flexible proofing times and variable proof-to-bake ratios.
Compose Systems' Star Proof proofing solution now supports X-Rite's i1iSis automated chart reader
This special report examines the current state of color proofing in the context of each of the graphic arts markets We regularly survey--commercial printers and prepress shops, graphic design and production firms, publishing companies, and Internet design and development firms.
Online Proofing Package Valued at $800 Now Free for Companies Signing Up in December
New e-Transactional Marketing Feature Converts Proofing Process from Cost Center to Profit Center by Creating High-margin, Incremental Sales Opportunities -
Online Proofing is a perfect compliment to their already 'online' workflow, plus their customers will love them for being considerate enough to deploy an easy solution that will make doing business with them easier.
PROOF-it-ONLINE, provider of interactive content approval solutions for creative and media services companies, today announced the release of an enhanced browser-based reviewer application as part of the company's online proofing application.
Online Proofing and Approval Management Technology Supports Leading Home Improvement Retailer's High-Volume Design/Print Needs & Streamlines Proof Approval Process -
com), the leading provider of online proofing and approval management technology, today announced that the company was selected by Apollo Press, a full-service print manufacturer, as the online proofing technology partner to support printing services for one of the country's largest universities and healthcare providers.
com), the leading provider of online proofing and approval management technology, today announced that AlphaGraphics will deploy the company's enterprise solution to streamline workflow, reduce hard costs and enhance the customer experience, replacing traditional proof delivery methods, which can be inefficient and expensive.
com), a full-service agency that provides public relations and marketing support services to a broad range of technology companies, announced today that PROOF-it-ONLINE, the leading provider of online proofing and approval management solutions, has selected the firm to provide ongoing strategic and proactive communications services.