proof Pronunciation: /pruːf/Translate proof | into German | into Italian | into Spanish French translation of proofn 1 (evidence) preuve (f) proof of identity = pièce (f) d'identité 2 (in printing, photography) épreuve (f) 3 (of alcohol) to be 70% proof = titrer 40° d'alcoolproof in other Oxford dictionaries Definition of proof in the British & World English dictionary Definition of proof in the US English dictionary