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

Research has connected phthalates with reproductive problems, such as genital malformations and undescended testes in baby boys and lower sperm counts and testosterone levels in adult males. —Sandee Lamotte, CNN Money, 15 Apr. 2025

The model had been battling arteriovenous malformation (AVM), a rare brain condition. —Jake Kanter, Deadline, 11 Apr. 2025

Both are sources of vitamin B9 and essential nutrients that help prevent neural tube defects (NTDs), a type of congenital malformation. —Jennifer Lefton, Ms, Rd/n, Cnsc, Fand, Verywell Health, 7 Apr. 2025

Vasquez Sura gives birth to a son who is later diagnosed with microtia, a congenital malformation of the external ear. —George Petras, USA Today, 7 Apr. 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