having the form changed, especially with loss of beauty; misshapen; disfigured: After the accident his arm was permanently deformed.
hateful; offensive: a deformed personality.

Origin of deformed

Middle English word dating back to 1350–1400; see origin at deform1, -ed2
Related formsde·form·ed·ly [dih-fawr-mid-lee] /dɪˈfɔr mɪd li/, adverbde·form·ed·ness, nounnon·de·formed, adjectiveun·de·formed, adjective

Synonyms for deformed

1. malformed, crippled.



verb (used with object)

to mar the natural form or shape of; put out of shape; disfigure: In cases where the drug was taken during pregnancy, its effects deformed the infants.
to make ugly, ungraceful, or displeasing; mar the beauty of; spoil: The trees had been completely deformed by the force of the wind.
to change the form of; transform.
Geology, Mechanics. to subject to deformation: The metal was deformed under stress.

verb (used without object)

to undergo deformation.

Origin of deform

1350–1400; Middle English deformen < Latin dēfōrmāre, equivalent to dē- de- + fōrmāre to form
Related formsde·form·a·ble, adjectivede·form·a·bil·i·ty, nounde·form·a·tive, adjectivede·form·er, nounun·de·form·a·ble, adjective

Synonyms for deform

1. misshape. See mar. 2. ruin. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for deformed

Contemporary Examples of deformed

Historical Examples of deformed

  • The nose was but a gaping orifice above a deformed and twisted mouth.

    The Monster Men

    Edgar Rice Burroughs

  • Can they give beauty to the deformed, strength to the weak, or health to the infirm?

  • That lonely vertical rod at once deformed and enfranchised the forest.

    Alarms and Discursions

    G. K. Chesterton

  • Her tender side is gored; her spotless and snowy coat is deformed with blood.


    William Godwin

  • No vulgar emotion ever deformed the godlike tranquility of his soul.


    William Godwin

British Dictionary definitions for deformed



disfigured or misshapen
morally perverted; warped
Derived Formsdeformedly (dɪˈfɔːmɪdlɪ), adverbdeformedness, noun



to make or become misshapen or distorted
(tr) to mar the beauty of; disfigure
(tr) to subject or be subjected to a stress that causes a change of dimensions
Derived Formsdeformable, adjectivedeformability, noundeformer, noun

Word Origin for deform

C15: from Latin dēformāre, from de- + forma shape, beauty
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 deformed



c.1400, "to disfigure," from Old French deformer (13c.), from Latin deformare "put out of shape, disfigure," from de- (see de-) + formare (see form (v.)). Related: Deformed; deforming.

Online Etymology Dictionary, © 2010 Douglas Harper

deformed in Medicine




Distorted in form.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.