/ ˌdiːfɔːˈmeɪʃn; NAmE -fɔːrˈm-/ noun
[ U ] the process or result of changing and spoiling the normal shape of sth
[ C ] a change in the normal shape of sth as a result of injury or illness :
a deformation of the spine
late Middle English : from Latin deformatio(n-) , from the verb deformare , from de- (expressing reversal) + forma a shape.