[mal-fawr-mey-shuh n, -fer-]


faulty or anomalous formation or structure, especially in a living body: malformation of the teeth.

Origin of malformation

First recorded in 1790–1800; mal- + formation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for malformation

Contemporary Examples of malformation

Historical Examples of malformation

  • If this is not duly attended to, the defect or malformation may be aggravated.

  • He was said to be robust looking, but with a malformation by which one of his legs was longer than the other.

  • It was a long time before he could walk, on account of some malformation of his limbs.

    Charles I

    Jacob Abbott

  • Had an impression that the late Lord Byron had some malformation of this kind.

    The Professor at the Breakfast Table

    Oliver Wendell Holmes (Sr.)

  • Does it depend on a malformation of the cranium, on the size or shape of the head?

    The Idiot

    Frederick Bateman

British Dictionary definitions for malformation



the condition of being faulty or abnormal in form or shape
pathol a deformity in the shape or structure of a part, esp when congenital
Derived Formsmalformed, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for malformation

also mal-formation, 1731, from mal- + formation.

Online Etymology Dictionary, © 2010 Douglas Harper

malformation in Medicine




Abnormal or anomalous formation or structure; deformity.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.