epilepsy

noun

ep·​i·​lep·​sy ˈe-pə-ˌlep-sē 

plural epilepsies

: any of various disorders marked by abnormal electrical discharges in the brain and typically manifested by sudden brief episodes of altered or diminished consciousness, involuntary movements, or convulsions

Examples of epilepsy in a Sentence

Recent Examples on the Web

In July 2023, the plaintiff, who is nonverbal and has been intellectually delayed since birth, according to the suit, was residing at University Health for inpatient epilepsy management. —Maddie Carr july 3, Kansas City Star, 3 July 2025

Researchers largely have to rely on scarce brain tissue collected via surgery on those with medical conditions like epilepsy or tissue donated by the deceased. —Lauren Leffer, Popular Science, 3 July 2025

Between her husband’s epilepsy and diabetes, her daughter’s Down syndrome and her own car accident years ago, the 65-year-old Sharonville resident and her family have relied on a whole host of doctors to guide them through new diagnoses and prescriptions. —Elizabeth B. Kim, The Enquirer, 2 July 2025

The Orange resident, one of Kim’s constituents who has previously voted for her, is the primary caregiver for her son, who has autism, epilepsy and does not speak. —Seema Mehta, Los Angeles Times, 2 July 2025

Word History

Etymology

Middle English epilencie, from Anglo-French & Latin; Anglo-French epelempsie, modification of Late Latin epilepsia, from Greek epilēpsia, from epilambanein to seize, from epi- + lambanein to take, seize — more at latch

First Known Use

1543, in the meaning defined above

Phrases Containing epilepsy

• anti-epilepsy
• grand mal epilepsy

Rhymes for epilepsy

• catalepsy
• narcolepsy

Kids Definition

epilepsy

noun

ep·​i·​lep·​sy ˈep-ə-ˌlep-sē 

: a disorder marked by abnormal electrical discharges in the brain, by attacks of convulsions, and by loss of consciousness

Medical Definition

epilepsy

noun

ep·​i·​lep·​sy ˈep-ə-ˌlep-sē 

plural epilepsies

: any of various disorders marked by abnormal electrical discharges in the brain and typically manifested by sudden brief episodes of altered or diminished consciousness, involuntary movements, or convulsions see absence epilepsy, grand mal sense 1, petit mal sense 1 focal epilepsy, jacksonian epilepsy, myoclonic epilepsy, temporal lobe epilepsy