Definitions

1. noun

a localized, pathologic dilatation of an artery, vein, or heart caused by weakening of the vessel wall, which may rupture and cause internal bleeding.

“The doctor ordered an immediate CT scan to check for an aneurysm in the patient’s brain.”

2. noun

a swelling or bulge, especially one that is abnormal.

“The doctor examined the patient’s leg and found an aneurysm near the knee.”