<p><strong>Noun</strong></p><ul><li>evidence sufficient to establish a thing as true, or to produce belief in its truth.</li><li>Synonyms: support, corroboration, demonstration, confirmation</li><li>anything serving as such evidence: What proof do you have?</li><li>the act of testing or making trial of anything; test; trial: to put a thing to the proof.</li><li>Synonyms: assay, examination</li><li>the establishment of the truth of anything; demonstration.</li><li>Law: (in judicial proceedings) evidence having probative weight.</li><li>the effect of evidence in convincing the mind.</li><li>an arithmetical operation serving to check the correctness of a calculation.</li><li>Mathematics, Logic: a sequence of steps, statements, or demonstrations that leads to a valid conclusion.</li><li>a test to determine the quality, durability, etc., of materials used in manufacture.</li><li>Distilling: the arbitrary standard strength, as of an alcoholic liquor.</li><li>strength with reference to this standard: “100 proof” signifies a proof spirit, usually 50% alcohol.</li><li>Photography: a trial print from a negative.</li><li>Printing: a trial impression, as of composed type, taken to correct errors and make alterations.</li><li>one of a number of early and superior impressions taken before the printing of the ordinary issue: to pull a proof.</li><li>(in printmaking) an impression taken from a plate or the like to show the quality or condition of work during the process of execution; a print pulled for examination while working on a plate, block, stone, etc.</li><li>Numismatics: one of a limited number of coins of a new issue struck from polished dies on a blank having a polished or matte surface.</li><li>the state of having been tested and approved.</li><li>proved strength, as of armor.</li><li>Scots Law: the trial of a case by a judge alone, without a jury.</li></ul><p><strong>Adjective</strong></p><ul><li>able to withstand; successful in not being overcome: proof against temptation.</li><li>Synonyms: steadfast, firm</li><li>impenetrable, impervious, or invulnerable: proof against outside temperature changes.</li><li>used for testing or proving; serving as proof.</li><li>of standard strength, as an alcoholic liquor.</li><li>of tested or proven strength or quality: proof armor.</li><li>noting pieces of pure gold and silver that the U.S. assay and mint offices use as standards.</li></ul><p><strong>Verb</strong></p><ul><li>(used with object) to test; examine for flaws, errors, etc.; check against a standard or standards.</li><li>Printing: prove (def 7).</li><li>to proofread.</li><li>to treat or coat for the purpose of rendering resistant to deterioration, damage, etc. (often used in combination): to proof a house against termites; to shrink-proof a shirt.</li><li>Cooking: to test the effectiveness of (yeast), as by combining with warm water so that a bubbling action occurs.</li><li>to cause (especially bread dough) to rise due to the addition of baker's yeast or other leavening.</li></ul><p><strong>End of Response</strong></p>