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Generalised epilepsy is a form of epilepsy characterised by generalised seizures. Generalised seizures, as opposed to partial seizures, are a type of seizures that impair consciousness and distort the electrical activity of a larger portion of the brain (which can be seen, for example, on electroencephalography, EEG).

Generalised seizures can be either absence seizures, myoclonic seizures, clonic seizures, tonic-clonic seizures or atonic seizures.

Generalised seizures occur in various seizure syndromes, including myoclonic epilepsy, familial neonatal convulsions, childhood absence epilepsy, absence epilepsy, infantile spasms (West's syndrome) and Lennox-Gastaut syndrome.