variants or less commonly aneurism
: an abnormal blood-filled bulge of a blood vessel and especially an artery resulting from weakening (as from disease) of the vessel wall

Examples of aneurysm in a Sentence

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Damon did not disclose whether his wife's aneurysm ruptured or provide additional details about her surgery. — Shafiq Najib, ABC News, 5 Nov. 2026 Matt Damon revealed in a new interview that his wife suffered a brain aneurysm weeks before the 2024 Oscars. — Daniel Kreps, Rolling Stone, 5 Nov. 2026 Matt Damon said that his wife, Luciano Barroso, suffered a brain aneurysm shortly before the 2024 Academy Award presentation. — Brian Niemietz, New York Daily News, 5 Nov. 2026 Four years on from when John passed away, Tom’s showed an aneurysm in the ascending portion, which is right where John’s was. — Esther Lian, PEOPLE, 3 Nov. 2026 See All Example Sentences for aneurysm

Word History

Etymology

Greek aneurysma, from aneurynein to dilate, from ana- + eurynein to stretch, from eurys wide — more at eury-

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of aneurysm was in the 15th century

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Cite this Entry

“Aneurysm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/aneurysm. Accessed 8 Nov. 2026.

Medical Definition

aneurysm

noun
an·​eu·​rysm
: an abnormal blood-filled dilatation of a blood vessel and especially an artery resulting from disease of the vessel wall
aneurysmal adjective

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