reproof /ɹɪˈpɹuːf/noun 1/ɹiːˈpɹuːf/ verb 1forms 3 noun1 •An act or instance of reproving or of reprobating; a rebuke, a reproach, an admonition.You could not give me a greater reproof for the mistake I fell into. It was all my doing, I know. I have not forgotten it, I assure you. — 1815 reproof /ɹiːˈpɹuːf/ verb1 •To proof again.We need to reproof the book before publication. formsreproofed · reproofing · reproofs