Definition of proof verb from the Oxford Advanced Learner's Dictionary

     

    proof

     verb
    verb
    BrE BrE//pruːf//
     
    ; NAmE NAmE//pruːf//
     
    Verb Forms present simple I / you / we / they proof
    BrE BrE//pruːf//
     
    ; NAmE NAmE//pruːf//
     
    he / she / it proofs
    BrE BrE//pruːfs//
     
    ; NAmE NAmE//pruːfs//
     
    past simple proofed
    BrE BrE//pruːft//
     
    ; NAmE NAmE//pruːft//
     
    past participle proofed
    BrE BrE//pruːft//
     
    ; NAmE NAmE//pruːft//
     
    -ing form proofing
    BrE BrE//ˈpruːfɪŋ//
     
    ; NAmE NAmE//ˈpruːfɪŋ//
     
     
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  1. 1proof something to put a special substance on something, especially cloth, to protect it against water, fire, etc. proofed canvas
  2. 2proof something to produce a test copy of a piece of printed work so that mistakes can be corrected colour proofing
  3. Word Familyprove verb (disprove)proof nounproven adjective (unproven) Word Origin Middle English preve, from Old French proeve, from late Latin proba, from Latin probare ‘to test, prove’. The change of vowel in late Middle English was due to the influence of prove. Current senses of the verb date from the late 19th cent.
See the Oxford Advanced American Dictionary entry: proof