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1. 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";
   - cogent evidence
    
2. (logic) a formal series of statements showing that if one thing is true something else necessarily follows from it
    
3. A measure of alcoholic strength expressed as an integer twice the percentage of alcohol present (by volume)
    
4. (printing) an impression made to check for errors
   - test copy, trial impression
    
5. A trial photographic print from a negative
    
6. The act of validating; finding or testing the truth of something
   - validation, substantiation

1. Make or take a proof of, such as a photographic negative, an etching, or typeset
    
2. Knead to reach proper lightness
   "proof dough"
    
3. Read for errors
   "I should proof my manuscripts";
   - proofread
    
4. Activate by mixing with water and sometimes sugar or milk
   "proof yeast"
    
5. Make resistant (to harm)
   "proof the materials against shrinking in the dryer"

1. (used in combination or as a suffix) able to withstand
   "temptation-proof"

Derived forms: proofing, proofs, proofed

See also: imperviable, impervious

Type of: alter, amount, argument, ascertain, assure, change, check, control, create, determination, ensure, evidence, finding, grounds, impression, insure, knead, make, measure, modify, photographic print, print, printing, produce, quantity, see, see to it, statement, strengthen, toughen, work

Encyclopedia: Proof