- an uncontrollable outburst of emotion or fear, often characterized by irrationality, laughter, weeping, etc.
- a psychoneurotic disorder characterized by violent emotional outbreaks, disturbances of sensory and motor functions, and various abnormal effects due to autosuggestion.
- conversion disorder.
- a mental disorder characterized by emotional outbursts, susceptibility to autosuggestion, and, often, symptoms such as paralysis that mimic the effects of physical disorders
- any frenzied emotional state, esp of laughter or crying
