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[dee-fawr-mey-shuh n, def-er-] /ˌdi fɔrˈmeɪ ʃən, ˌdɛf ər-/
the act of deforming; distortion; disfigurement.
the result of deforming; change of form, especially for the worse.
an altered form.
Geology, Mechanics. a change in the shape or dimensions of a body, resulting from stress; strain.
late Middle English
1400-50; late Middle English deformacioun < Latin dēfōrmātiōn- (stem of dēfōrmātiō), equivalent to dēfōrmāt(us) (past participle of dēfōrmāre; see deform1) + -iōn- -ion
Related forms
deformational, adjective
nondeformation, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for deformation
  • His team's computer models are based on the idea that the floor of the basin was pre-stressed by years of crustal deformation.
  • Paradoxically, its surface appears to be shaped by the deformation of the crust and by volcanic activity.
  • Most solids, if pulled or twisted, will give a little in a process known as elastic deformation.
  • If journalists suffer from a professional deformation it is to accentuate the negative.
  • There is no moral responsibility for deformation or disproportion.
  • Fatigue occurs at a lower load, in the region where deformation is elastic.
  • What people call deformation in my work results from their own misapprehension.
  • Others have turned to beams of electrons or ions, or use heat deformation to form patterns.
  • Significant structural deformation of mid- and high-rise buildings.
  • The struggle to reform society there is linked with the struggle to prevent its deformation here.
British Dictionary definitions for deformation


the act of deforming; distortion
the result of deforming; a change in form, esp for the worse
a change in the dimensions of an object resulting from a stress
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
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Word Origin and History for deformation

mid-15c., "transformation," from Old French deformation and directly from Latin deformationem (nominative deformatio), noun of action from past participle stem of deformare (see deform).

Online Etymology Dictionary, © 2010 Douglas Harper
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deformation in Medicine

deformation de·for·ma·tion (dē'fôr-mā'shən, děf'ər-)

  1. An alteration in shape or structure of a previously normally formed part.

  2. A deformity.

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