epilepsy

American  

[ep-uh-lep-see] / ˈɛp əˌlɛp si /

noun

Pathology.

1. a disorder of the nervous system, characterized either by mild, episodic loss of attention or sleepiness (petit mal) or by severe convulsions with loss of consciousness (grand mal).

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epilepsy British  

/ ˈɛpɪˌlɛpsɪ /

noun

1. a disorder of the central nervous system characterized by periodic loss of consciousness with or without convulsions. In some cases it is due to brain damage but in others the cause is unknown See also grand mal petit mal

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epilepsy Scientific  

/ ĕp′ə-lĕp′sē /

1. Any of various neurological disorders characterized by recurrent seizures. Epilepsy is caused by abnormal electrical activity in the brain.

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epilepsy Cultural  

1. 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.

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Etymology

Origin of epilepsy

First recorded in 1570–80; from Old French epilepsie, from Late Latin epilēpsia, from Greek epilēpsía “epileptic seizure,” derivative of epilambánein “to take hold of, seize, attack”; see epi-, -lepsy ( def. )

Explanation

If you have epilepsy, you have a central nervous system disorder that may cause you to lose consciousness and have convulsions. The noun epilepsy comes from the Greek word epilēpsia, which itself means seizure. Not all seizures are caused by epilepsy, but an epileptic seizure occurs when a strong electrical disturbance occurs in the brain. The severity and intensity of the seizures depend on many factors and are unique to each person. It may be possible to control seizures through medication, although not everyone with epilepsy will respond to medication. People with uncontrolled epilepsy should not drive.

Example Sentences

In Shepperton High Street, in Surrey, pharmacist Akash Patel is making up a monthly prescription for another patient with epilepsy.

From BBC • Apr. 30, 2026

This time, Warner Judd got an answer when she was diagnosed with focal epilepsy, meaning her seizures typically start in one side of the brain and cause unusual feelings, sensations or movements.

From BBC • Apr. 23, 2026

She had suffered a seizure, caused by undiagnosed epilepsy.

From BBC • Apr. 23, 2026

Phoebe Tesoriere, 23, claims she was told she was anxious, depressed, had epilepsy and warned she'd be treated as a mental health patient if she kept returning to A&E.

From BBC • Apr. 9, 2026

Ever since then, the dove has been able to give epilepsy to humans.

From "A Girl Named Disaster" by Nancy Farmer

Related Words

• contraction
• cramp
• paroxysm
• seizure
• tremor