- a sudden, usually marked loss of bodily function due to rupture or occlusion of a blood vessel.
- a hemorrhage into an organ cavity or tissue.
- a state of extreme anger.
- sudden loss of consciousness, often followed by paralysis, caused by rupture or occlusion of a blood vessel in the brain
late 14c., “sudden fit of paralysis and dizziness,” from Old French apoplexie or directly from Late Latin apoplexia, from Greek apoplexia, from apoplessein “to strike down and incapacitate,” from apo- “off” (see ), in this case probably an intensive prefix, + plessein “hit” (cf. (n.), also with a root sense of “stricken”). The Latin translation, sideratio, means “disease caused by a constellation.”
- Sudden impairment of neurological function, especially from a cerebral hemorrhage; a stroke.
- An effusion of blood into a tissue or organ.