de·​form | \ di-ˈfȯrm How to pronounce deform (audio) , dē-\
deformed; deforming; deforms

Definition of deform

transitive verb

1 : to spoil the form of
2a : to spoil the looks of : disfigure a face deformed by bitterness
b : to mar the character of a marriage deformed by jealousy
3 : to alter the shape of by stress

intransitive verb

: to become misshapen or changed in shape

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Other Words from deform

deformable \ di-​ˈfȯr-​mə-​bəl How to pronounce deformable (audio) , dē-​ \ adjective

Choose the Right Synonym for deform

deform, distort, contort, warp means to mar or spoil by or as if by twisting. deform may imply a change of shape through stress, injury, or accident of growth. a face deformed by hatred distort and contort both imply a wrenching from the natural or normal, but contort suggests a more involved twisting and a more grotesque and painful result. the odd camera angle distorts the figure disease had contorted her body warp indicates an uneven shrinking that bends or twists out of a flat plane. warped floorboards

Examples of deform in a Sentence

The disease eventually deforms the bones. The disease eventually causes the bones to deform.
Recent Examples on the Web Often, the single eyeball stared unnervingly out from the middle of the face, sometimes with a fleshy forehead proboscis above it — a nose at once displaced and deformed. Eric Boodman, STAT, "Leave a Comment," 23 Oct. 2019 Powerful bite-like motions deformed but did not destroy the collagen. Kyle Mizokami, Popular Mechanics, "What the U.S. Air Force Can Learn From This Piranha-Proof Fish," 18 Oct. 2019 The bridge managed stress relatively well, only deforming slightly before reaching the point of collapse. Jason Daley, Smithsonian, "Scientists Prove Leonardo da Vinci’s 500-Year-Old Bridge Design Actually Works," 16 Oct. 2019 For example, in the video below, a spherical droplet gets sucked into a narrow tube, which deforms it into a cylinder. Kelso Harper, Scientific American, "Watch Liquid-Based Magnet Droplets Twirl and Morph," 23 July 2019 The powertrain software in some of these cars may not work properly, which could deform the fuel tank. Aj Willingham, CNN, "Ford is recalling 58,000 Focus cars because of possible fuel tank issues," 10 July 2019 Unlike cyclists today, who tend to specialize in certain kinds of races, Mr. Gimondi won all manner of events, including Paris-Roubaix, the tough and often dangerous race over the grotesquely deformed cobblestoned farm tracks of northern France. Ian Austen,, "Felice Gimondi, cyclist with a career Triple Crown, dies at 76," 25 Aug. 2019 The ridge is a gigantic relic from millions of years ago, when the neighboring North American and Eurasian continents began pivoting away from each other, twisting and deforming the expanding Arctic Ocean floor. Mark Fischetti, Scientific American, "Nations Claim Large Overlapping Sections of Arctic Seafloor," 23 July 2019 This field of mathematics studies the properties of objects that remain constant even if the object is twisted or deformed, but not torn apart. Quanta Magazine, "Nobel Prize Awarded for Quantum Topology," 4 Oct. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'deform.' 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 deform

15th century, in the meaning defined at transitive sense 1

History and Etymology for deform

Middle English, from Anglo-French or Latin; Anglo-French desfurmer, from Latin deformare, from de- + formare to form, from forma form

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Statistics for deform

Last Updated

15 Nov 2019

Time Traveler for deform

The first known use of deform was in the 15th century

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More Definitions for deform


How to pronounce deform (audio)

English Language Learners Definition of deform

: to change something so that it no longer has its normal or original shape


de·​form | \ di-ˈfȯrm How to pronounce deform (audio) \
deformed; deforming

Kids Definition of deform

: to spoil the form or the natural appearance of

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More from Merriam-Webster on deform

Thesaurus: All synonyms and antonyms for deform

Rhyming Dictionary: Words that rhyme with deform

Spanish Central: Translation of deform

Nglish: Translation of deform for Spanish Speakers

Comments on deform

What made you want to look up deform? Please tell us where you read or heard it (including the quote, if possible).


to engage in dissolute behavior

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