malformation

noun

mal·​for·​ma·​tion ˌmal-fȯr-ˈmā-shən 

-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

The innovation could open new possibilities in treating conditions like stroke, arteriovenous malformations, and even eye cancers in children. —Neetika Walter, Interesting Engineering, 27 Oct. 2025

One rare disease of particular interest for my lab is cerebral cavernous malformation, or CCM. —Richard J. Price, The Conversation, 15 Oct. 2025

Untreated fever in pregnancy is associated with miscarriage, fetal organ malformations and cardiovascular complications, and even autism, according to a 2021 statement from the Society for Maternal-Fetal Medicine. —Dominique Mosbergen, Time, 23 Sep. 2025

Drake White had a stroke while performing on stage in 2019 and was later diagnosed with an arteriovenous malformation (AVM), according to his biography on his website. —Ryan Brennan, Miami Herald, 9 Sep. 2025

Word History

First Known Use

1800, in the meaning defined above

Rhymes for malformation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

malformation

noun

mal·​for·​ma·​tion ˌmal-fȯr-ˈmā-shən 

-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- 

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

congenital malformations