• the act of validating; finding or testing the truth of something
• a trial photographic print from a negative
• any factual evidence that helps to establish the truth of something; "if you have any Proof for what you say, now is the time to produce it"
• (printing) an impression made to check for errors
• 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)
• make resistant to water, sound, errors, etc.; "Proof the materials against shrinking in the dryer"
• activate by mixing with water and sometimes sugar or milk; "Proof yeast"
• read for errors; "I should Proofread my manuscripts"
• knead to reach proper lightness; "Proof dough"
• make or take a Proof of, such as a photographic negative, an etching, or typeset

'Proof' in other languages