unproof in English dictionary unproof Meanings and definitions of "unproof" noun Absence or lack of proof or evidence; prooflessness. noun That which is not proven. verb (transitive) To undo the proofing of; expose to the possibility of failure. more Grammar and declension of unproof unproof (plural unproofs) unproof (third-person singular simple present unproofs, present participle unproofing, simple past and past participle unproofed) more Sample sentences with "unproof" Declension Stem Try again Available translations Cornish Authors