A disorder of the brain characterized by sudden, recurring attacks of abnormal brain function, often resulting in convulsions or seizures. The seizures associated with epilepsy can sometimes be controlled by medication.
epilepsy ep·i·lep·sy (ěp'ə-lěp'sē)
n.
Any of various neurological disorders characterized by sudden, recurring attacks of motor, sensory, or psychic malfunction with or without loss of consciousness or convulsive seizures.