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 Researchers later found that thalidomide caused irreversible birth defects, with thousands of children born with severe malformations and many not surviving more than a few days. Los Angeles Times, "Column: Here’s why a COVID-19 vaccine could end up costing you a small fortune," 21 Apr. 2020 Rape accounts for 1%, while fetal malformation makes up about 3%, according to Vargas. Ella Torres, ABC News, "Colombia to decide on historic abortion ruling," 16 Feb. 2020 If the fetal genetic test comes back normal, that’s a clue that doctors should explore nongenetic causes, such as a malformation of the uterus or a hormonal issue. NBC News, "Many miscarriages are still a mystery. A new test could give women faster answers.," 10 Feb. 2020 Played by Annette O'Toole, Caroline was revealed to be a famous artist struggling with cerebral cavernous malformations (a.k.a. Heather Finn, Good Housekeeping, "'The Good Doctor' Fans Think They Found a Continuity Error in Monday's Episode," 28 Jan. 2020 Specifically, the risk of cardiac malformations was higher. Gisela Crespo, CNN, "Common antibiotics linked to increased risk of birth defects, study says," 19 Feb. 2020 For more on Drake White and arteriovenous malformations, pick up the latest issue of PEOPLE, on newsstands Friday. Tricia Despres,, "Drake White Reveals He Has AVM, a Debilitating Brain Condition, After Nearly Collapsing Onstage," 21 Aug. 2019 Due to a small malformation of the optic nerve in the brain, Lily has troubles with nystagmas (involuntary shaking of the eyes) and issues with depth perception. Saryn Chorney,, "Legally Blind 9-Year-Old Girl Sees The Nutcracker Ballet for First Time with Special Glasses," 20 Dec. 2019 Mikhail was preparing for treatment of a venous malformation. Kat Stromquist, Arkansas Online, "For foreign patients, long path leads to LR," 25 Dec. 2019

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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Time Traveler for malformation

Time Traveler

The first known use of malformation was in 1800

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Cite this Entry

“Malformation.” Dictionary, Merriam-Webster, Accessed 13 Jul. 2020.

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More Definitions for malformation


How to pronounce malformation (audio)

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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