- 1proof something to put a special substance on something, especially cloth, to protect it against water, fire, etc. proofed canvas
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- 2proof something to produce a test copy of a piece of printed work so that mistakes can be corrected color proofing prove verb (≠disprove)proof nounproven adjective (≠unproven)
proof
verbNAmE//pruf//
Verb Forms present simple I / you / we / they proof he / she / it proofs
past simple proofed
-ing form proofing
Check pronunciation: proof