What is Epilepsy? Epilepsy is a central nervous system (neurological) disorder in which brain activity becomes abnormal, causing seizures or periods of unusual behavior, sensations, and sometimes loss of awareness. Treatment with medications or sometimes surgery can control seizures for the majority of people with epilepsy. The word “epilepsy” does not indicate anything about the cause of the person’s seizures or their severity. epilepsy meaning, epilepsy cure, types of epilepsy, epilepsy symptoms