discussive adjective 2noun 1forms 3 adjective2 •(no longer used) Able or tending to discuss (break apart), or disperse, tumors or coagulated matter. •(no longer used) Doubt-dispelling; decisive.A kind of peremptory and discussive voice. — 1690 noun1 •(no longer used) A medicine that discusses (breaks apart) or disperses morbid humours formsdiscussives · more discussive · most discussive