Definition: Aneurysm, a term in medical jargon referring to the condition where blood clots are formed and break out into an inflamed, swollen area or vessel wall, also known as a "bleeding ulcer." It typically occurs after surgery, trauma, or certain infections. This condition is characterized by bleeding from punctured veins, often seen in the legs, but can spread through the body to other parts like the lungs, abdomen, and brain.