An aneurysm is a weak or expanded part of an artery, like a bulge in a balloon. Your arteries are large blood vessels that carry oxygenated blood from your heart to other parts of your body. If an area in an artery wall weakens, the force of blood pumping through can result in a bulge or aneurysm. Aneurysms usually aren’t painful.

Aneurysm Definition & Meaning | Dictionary.com Top Definitions Quiz Examples British Scientific aneurysm or an·eu·rism [ an-y uh-riz- uhm ] SHOW IPA 📙 Middle School Level noun Pathology. a permanent cardiac or arterial dilatation usually caused by weakening of the vessel wall. QUIZ