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from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To spoil the natural form of; misshape: a body that had been deformed by disease.
  • transitive v. To spoil the beauty or appearance of; disfigure.
  • transitive v. Physics To alter the shape of by pressure or stress.
  • transitive v. Geology To change the original state or size of a rock mass, especially by folding or faulting.
  • intransitive v. To become deformed. See Synonyms at distort.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To remove the form of.
  • v. To remove the looks of; to disfigure; as, a face deformed by bitterness.
  • v. To mar the character of; as, a marriage deformed by jealousy.
  • v. To alter the shape of by stress.
  • v. To become misshapen or changed in shape.
  • adj. Deformed, misshapen.

from the GNU version of the Collaborative International Dictionary of English

  • transitive v. To spoil the form of; to mar in form; to misshape; to disfigure.
  • transitive v. To render displeasing; to deprive of comeliness, grace, or perfection; to dishonor.
  • adj. Deformed; misshapen; shapeless; horrid.

from The Century Dictionary and Cyclopedia

  • To change or alter the form of; convert into a new form or shape.
  • Specifically To mar the natural form or shape of; put out of shape; disfigure, as by malformation of a limb or some other part of the body.
  • To render ugly, ungraceful, or displeasing; mar the beauty of; spoil: as, to deform the person by unbecoming dress; to deform the character by vicious conduct.
  • Disfigured; being of an unnatural, distorted, or disproportioned form; displeasing to the eye.
  • To form; fashion; delineate; engrave.
  • In geometry, to bend without stretching or tearing.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. assume a different shape or form
  • v. alter the shape of (something) by stress
  • v. make formless
  • v. twist and press out of shape
  • v. become misshapen
  • v. cause (a plastic object) to assume a crooked or angular form


Middle English deformen, from Old French deformer, from Latin dēfōrmāre : dē-, de- + fōrma, form.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Middle English deformen, from Old French deformer, from Latin deformare, infinitive of deformo, from de- + formo ("to form"), from the noun forma ("form"). (Wiktionary)



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