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Meaning of PROOF

Pronunciation:  proof

WordNet Dictionary
  1. [n]  the act of validating; finding or testing the truth of something
  2. [n]  a trial photographic print from a negative
  3. [n]  (printing) a trial impression made to check for errors
  4. [n]  (logic or mathematics) a formal series of statements showing that if one thing is true something else necessarily follows from it
  5. [n]  a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)
  6. [v]  make resistant, as to water, sound, errors, etc.
  7. [v]  activate by mixing with water and sometimes sugar or milk; "proof yeast"
  8. [v]  read for errors
  9. [v]  make or take a proof of, such as a photographic negative, an etching, or typeset

PROOF is a 5 letter word that starts with P.


 Synonyms: cogent evidence, proofread, substantiation, test copy, validation
 See Also: alter, amount, argument, ascertain, assure, authentication, certification, change, check, check, confirmation, control, create, demonstration, determination, documentation, ensure, establishment, evidence, finding, fireproof, foolproof, foundry proof, galley proof, goofproof, grounds, impression, insure, logical proof, make, mathematical proof, measure, monetisation, monetization, monstrance, photographic print, print, printing, probate, produce, quantity, quantum, read, see, see to it, statement, strengthen, substantiation, support, validation, verification, weatherproof



Webster's 1913 Dictionary
  1. \Proof\, n. [OF. prove, proeve, F. preuve, fr. L. proba,
    fr. probare to prove. See {Prove}.]
    1. Any effort, process, or operation designed to establish or
       discover a fact or truth; an act of testing; a test; a
             For whatsoever mother wit or art Could work, he put
             in proof.                             --Spenser.
             You shall have many proofs to show your skill.
             Formerly, a very rude mode of ascertaining the
             strength of spirits was practiced, called the proof.
    2. That degree of evidence which convinces the mind of any
       truth or fact, and produces belief; a test by facts or
       arguments that induce, or tend to induce, certainty of the
       judgment; conclusive evidence; demonstration.
             I'll have some proof.                 --Shak.
             It is no proof of a man's understanding to be able
             to confirm whatever he pleases.       --Emerson.
    Note: Properly speaking, proof is the effect or result of
          evidence, evidence is the medium of proof. Cf.
          {Demonstration}, 1.
    3. The quality or state of having been proved or tried;
       firmness or hardness that resists impression, or does not
       yield to force; impenetrability of physical bodies.
    4. Firmness of mind; stability not to be shaken.
    5. (Print.) A trial impression, as from type, taken for
       correction or examination; -- called also {proof sheet}.
    6. (Math.) A process for testing the accuracy of an operation
       performed. Cf. {Prove}, v. t., 5.
    7. Armor of excellent or tried quality, and deemed
       impenetrable; properly, armor of proof. [Obs.] --Shak.
    {Artist's proof}, a very early proof impression of an
       engraving, or the like; -- often distinguished by the
       artist's signature.
    {Proof reader}, one who reads, and marks correction in,
       proofs. See def. 5, above.
    Syn: Testimony; evidence; reason; argument; trial;
         demonstration. See {Testimony}.
  2. \Proof\, a.
    1. Used in proving or testing; as, a proof load, or proof
    2. Firm or successful in resisting; as, proof against harm;
       waterproof; bombproof.
             I . . . have found thee Proof against all
             temptation.                           --Milton.
             This was a good, stout proof article of faith.
    3. Being of a certain standard as to strength; -- said of
       alcoholic liquors.
    {Proof charge} (Firearms), a charge of powder and ball,
       greater than the service charge, fired in an arm, as a gun
       or cannon, to test its strength.
    {Proof impression}. See under {Impression}.
    {Proof load} (Engin.), the greatest load than can be applied
       to a piece, as a beam, column, etc., without straining the
       piece beyond the elastic limit.
    {Proof sheet}. See {Proof}, n., 5.
    {Proof spirit} (Chem.), a strong distilled liquor, or mixture
       of alcohol and water, containing not less than a standard
       amount of alcohol. In the United States ``proof spirit is
       defined by law to be that mixture of alcohol and water
       which contains one half of its volume of alcohol, the
       alcohol when at a temperature of 60[deg] Fahrenheit being
       of specific gravity 0.7939 referred to water at its
       maximum density as unity. Proof spirit has at 60[deg]
       Fahrenheit a specific gravity of 0.93353, 100 parts by
       volume of the same consisting of 50 parts of absolute
       alcohol and 53.71 parts of water,'' the apparent excess of
       water being due to contraction of the liquids on mixture.
       In England proof spirit is defined by Act 58, George III.,
       to be such as shall at a temperature of 51[deg] Fahrenheit
       weigh exactly the 12/13 part of an equal measure of
       distilled water. This contains 49.3 per cent by weight, or
       57.09 by volume, of alcohol. Stronger spirits, as those of
       about 60, 70, and 80 per cent of alcohol, are sometimes
       called second, third, and fourth proof spirits
    {Proof staff}, a straight-edge used by millers to test the
       flatness of a stone.
    {Proof stick} (Sugar Manuf.), a rod in the side of a vacuum
       pan, for testing the consistency of the sirup.
    {Proof text}, a passage of Scripture used to prove a
Computing Dictionary

1. A finite sequence of well-formed formulas, F1, F2, ... Fn, where each Fi either is an axiom, or follows by some rule of inference from some of the previous F's, and Fn is the statement being proved.

See also proof theory.

2. A left-associative natural language parser by Craig R. Latta <[email protected]>. Ported to decstation 3100, sun-4.

E-mail: <[email protected]>. Mailing list: [email protected] (Subject: add me).