sinner UK /ˈsɪnəː/US /ˈsɪnɚ/ noun5 •A person who sins or has sinned. •A person who, by one particular action, has sinned. •An unregenerate person. •(figurative) A person with negative qualities; one who does bad things. •(figurative) One who lives a hedonist life; a self-indulgent person.Are you a sinner or a saint? formssinners