Noun | 1. | dysfunction - (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group; "erectile dysfunction"; "sexual relationship dysfunction" medical specialty, medicine - the branches of medical science that deal with nonsurgical techniques ED, erectile dysfunction, male erecticle dysfunction - impotence resulting from a man's inability to have or maintain an erection of his penis pathology - any deviation from a healthy or normal condition |