Proven \Prov"en\, p. p. or a. Proved. ``Accusations firmly proven in his mind.'' --Thackeray. Of this which was the principal charge, and was generally believed to beproven, he was acquitted. --Jowett (Thucyd. ). {Not proven} (Scots Law), a verdict of a jury that the guilt of the accused is not made out, though not disproved. --Mozley & W.