mal·for·ma·tion | \ˌmal-fȯr-ˈmā-shən, -fər-\

Definition of malformation 

: irregular, anomalous, abnormal, or faulty formation or structure

Examples of malformation in a Sentence

The condition is marked by malformation of the spine. She underwent surgery to correct a heart malformation.

Recent Examples on the Web

An animal died of a lung malformation only a few minutes after birth. Deutsche Welle, USA TODAY, "Northern white rhino could be saved from extinction using embryos," 5 July 2018 Matt had something called arteriovenous malformation, or AVM. Paul Daugherty,, "Paul Daugherty: In his 15 years, Matt Stratman made his mark on our community.," 6 July 2018 Without treatment, vascular malformations can bleed abruptly and become life-threatening, while angiomyolipomas can grow, causing pain and bleeding, explained McCauley, who is not involved in the first lady’s medical care. Marie Mccullough,, "Melania Trump treated for benign kidney condition at Walter Reed," 14 May 2018 In the case of a kidney abnormality, doctors would typically thread a thin tube through a blood vessel, often starting in the groin, and inject a substance to cut off blood flow to the benign tumor or malformation. Kim Painter, USA TODAY, "Q&A: What might be going on with Melania Trump's benign kidney condition," 15 May 2018 Echocardiograms revealed that his heart has adapted to the stress of training with very little malformation, such as thickened ventricular walls, that often affects other elite athletes’ performances. Nick Heil, Outside Online, "Are Kilian Jornet's Speed Records Too Good to Be True?," 12 July 2018 Stratman had a previously undiagnosed condition involving an AVM (arteriovenous malformation). Scott Springer,, "Celebration of the life of Matt Stratman is Thursday at Lakota West," 2 July 2018 His injury resulted in bleeding in the brain due to a previously undiagnosed condition involving an AVM (arteriovenous malformation) abnormal blood vessels connecting arteries and veins in the brain. Scott Springer,, "#StratmanStrong community of Lakota West loses a warrior," 30 June 2018 In this April 23, 2018, photo, Meagan Patrick kisses her daughter, Addelyn Patrick, 5, in the playroom at Realm of Caring in Colorado Springs, Colo. Addelyn was born with a brain malformation and suffers from multiple forms of seizures. Washington Post, "US could back 1st pot-derived medicine, and some are worried," 19 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'malformation.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of malformation

1800, in the meaning defined above

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Last Updated

12 Sep 2018

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Time Traveler for malformation

The first known use of malformation was in 1800

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English Language Learners Definition of malformation

medical : a condition in which part of the body does not have the normal or expected shape


mal·for·ma·tion | \ˌmal-fȯr-ˈmā-shən \

Kids Definition of malformation

: something that is badly or wrongly formed


mal·for·ma·tion | \ˌmal-fȯr-ˈmā-shən, -fər- \

Medical Definition of malformation 

: irregular, anomalous, abnormal, or faulty formation or structure congenital malformations

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evasion of direct action or statement

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