proof - noun

any factual evidence that helps to establish the truth of something

a formal series of statements showing that if one thing is true something else necessarily follows from it

a measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)

(printing) an impression made to check for errors

a trial photographic print from a negative

the act of validating; finding or testing the truth of something

proof - verb

• make or take a proof of, such as a photographic negative, an etching, or typeset
• knead to reach proper lightness
• read for errors
• activate by mixing with water and sometimes sugar or milk
• make resistant (to harm)

proof - adjective

• (used in combination or as a suffix) able to withstand

proof - thesaurus

proofread   substantiation   validation