mal·​for·​ma·​tion | \ ˌmal-fȯr-ˈmā-shən How to pronounce malformation (audio) , -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

Another study from Walsh’s group published today reveals that mutations in even a small number of cells can result in severe brain malformations, such as brains that have two cortexes, or are smooth as an egg. Quanta Magazine, "I Contain Multitudes," 21 Aug. 2014 An earlier study had found no connection between methylphenidate and major malformations. Karen Weintraub, USA TODAY, "Why cases of ADHD in young women are skyrocketing," 18 Jan. 2018 At birth, those with FOP often notice malformation of the big toe. Fiza Pirani, ajc, "6 incredibly rare diseases you’ve probably never heard of," 7 June 2018 An Iowa couple who welcomed their first baby in July had been preparing to say goodbye to him since about halfway through their pregnancy after doctors diagnosed the unborn child with a terminal brain malformation. Alexandria Hein, Fox News, "Parents of baby misdiagnosed with terminal brain condition in utero left fate 'in God's hands'," 28 Aug. 2018 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

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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Statistics for malformation

Last Updated

4 Jul 2019

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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 How to pronounce malformation (audio) \

Kids Definition of malformation

: something that is badly or wrongly formed


mal·​for·​ma·​tion | \ ˌmal-fȯr-ˈmā-shən, -fər- How to pronounce malformation (audio) \

Medical Definition of malformation

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

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More from Merriam-Webster on malformation

Rhyming Dictionary: Words that rhyme with malformation

Spanish Central: Translation of malformation

Nglish: Translation of malformation for Spanish Speakers Encyclopedia article about malformation

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something desired as essential

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