proof meaning and definition

PROOF noun

Definition of proof (noun)

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"
   • synonyms: cogent evidence
2. 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
   • synonyms: test copy, trial impression
5. a trial photographic print from a negative
6. the act of validating; finding or testing the truth of something
   • synonyms: substantiation, validation

PROOF verb

Definition of proof (verb)

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 proofread my manuscripts"
   • synonyms: 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"

PROOF adjective

Definition of proof (adjective)

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