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1. A change for the worse
   - distortion
    
2. Alteration in the shape or dimensions of an object as a result of the application of stress to it
    
3. The act of twisting or deforming the shape of something (e.g., yourself)
   - contortion

Derived forms: deformations

See also: deform, deformational

Type of: alteration, change, change of shape, damage, harm, impairment, modification

Encyclopedia: Deformation