Aneurysm – Definition & Meaning

Aneurysm is a term that is commonly used in the medical field. It refers to an abnormal bulging or swelling of a blood vessel, usually an artery. This condition can be life-threatening, especially if the aneurysm ruptures and causes internal bleeding. In this article, we will explore the definition and meaning of aneurysm, its origin, associations, synonyms, antonyms, and some example sentences.


According to the National Heart, Lung, and Blood Institute, aneurysm is defined as “a bulge or ballooning in a blood vessel caused by weakness in the vessel wall.” This bulge can occur in any blood vessel in the body, but it is most commonly found in the aorta, which is the main artery that carries blood from the heart to the rest of the body.
Another definition of aneurysm is provided by the American Society of Hematology, which describes it as “an abnormal dilation or ballooning of a blood vessel due to a weakened or damaged vessel wall.” This definition emphasizes the fact that aneurysm is caused by a weakness in the blood vessel wall, which can be due to a variety of factors such as high blood pressure, smoking, and genetic predisposition.


The word aneurysm comes from the Greek word “aneurysma,” which means “dilation.” The term was first used in the 17th century to describe the abnormal bulging of blood vessels. The exact origin of aneurysm is not known, but it is believed to be a condition that has existed for centuries.

Meaning in different dictionaries

The meaning of aneurysm is consistent across different dictionaries. According to Merriam-Webster, aneurysm is defined as “an abnormal blood-filled dilation of a blood vessel and especially an artery resulting from disease of the vessel wall.” The Oxford English Dictionary defines aneurysm as “a localized dilation of an artery caused by weakness in the arterial wall.”


Aneurysm is associated with several medical conditions, such as high blood pressure, atherosclerosis, and connective tissue disorders. It can also be caused by trauma to the blood vessel, such as a car accident or sports injury. Aneurysms can occur in any part of the body, but they are most commonly found in the brain, aorta, and abdominal arteries.


Some synonyms of aneurysm include bulge, swelling, dilation, and ballooning. These words are used to describe the abnormal expansion of a blood vessel due to weakness in the vessel wall.


There are no antonyms for aneurysm, as it is a medical condition that cannot be reversed or cured. However, there are treatments available to manage the symptoms and prevent complications.

The same root words

The root word of aneurysm is “aneurysma,” which comes from the Greek word “aneuryssein,” meaning “to dilate.” Other words that share this root include aneurysmal, aneurysmectomy, and aneurysmography.

Example Sentences

  1. The patient was diagnosed with an abdominal aortic aneurysm.
  2. The surgeon performed an aneurysm repair to prevent the bulge from rupturing.
  3. Smoking and high blood pressure increase the risk of developing an aneurysm.
  4. The CT scan revealed a small brain aneurysm that required monitoring.
  5. A ruptured aneurysm can cause severe internal bleeding and be life-threatening.
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