| Noun | 1. | neurosis - a mental or personality disturbance not attributable to any known neurological or organic dysfunction folie, mental disorder, mental disturbance, psychological disorder, disturbance - (psychiatry) a psychological disorder of thought or emotion; a more neutral term than mental illness hysterical neurosis, hysteria - neurotic disorder characterized by violent emotional outbreaks and disturbances of sensory and motor functions anxiety neurosis - characterized by diffuse anxiety and often somatic manifestations of fear |