malformation

noun

mal·​for·​ma·​tion ˌmal-fȯr-ˈmā-shən How to pronounce malformation (audio)
-fər-
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the last seven years, researchers have linked this form of air pollution to fetal malformation, miscarriages, and stillbirths. Anuradha Varanasi, Forbes.com, 23 July 2025 Often, the malformations are so severe that babies don't make it to birth. Wendy Grossman Kantor, People.com, 10 June 2025 Vascular Malformations Vascular malformations are atypical or abnormal connections in veins and arteries. Angelica Bottaro, Verywell Health, 14 May 2025 While many people born with AVMs live normal lives without even noticing, such malformations can be dangerous, even fatal if left untreated. Jonathan Hawkins, CNN Money, 9 May 2025 See All Example Sentences for malformation

Word History

First Known Use

1800, in the meaning defined above

Time Traveler
The first known use of malformation was in 1800

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Cite this Entry

“Malformation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/malformation. Accessed 10 Aug. 2025.

Kids Definition

malformation

noun
mal·​for·​ma·​tion ˌmal-fȯr-ˈmā-shən How to pronounce malformation (audio)
-fər-
: a misshapen, abnormal, or faulty formation or structure
malformation of the knee joint

Medical Definition

malformation

noun
mal·​for·​ma·​tion ˌmal-fȯr-ˈmā-shən, -fər- How to pronounce malformation (audio)
: irregular, anomalous, abnormal, or faulty formation or structure
congenital malformations
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