deform UK /dɪˈfɔːm/US /dəˈfɔɹm/verb 5adjective 1forms 7 verb5 •To change the form of (something), usually thus making it disordered or irregular; to give (something) an abnormal or unusual shape.They say this tovvne is full of cosenage: / As nimble Iuglers that deceiue the eie: / Darke vvorking Sorcerers that change the minde: / Soule-killing VVitches, that deforme the bodie: […] — 1594 •To alter the shape of (something) by applying a force or stress. •To change the look of (something), usually thus making it imperfect or unattractive; to give (something) an abnormal or unusual appearance.a face deformed by bitterness •To become changed in shape or misshapen. •To mar the character or quality of (something).a marriage deformed by jealousy adjective1 •Having an unusual and unattractive shape; deformed, misshapen; hence, hideous, ugly.[…] I did proclame, / That vvho so kild that monster most deforme, / And him in hardy battayle ouercame, / Should haue mine onely daughter to his Dame, and of my kingdome heyre apparaunt bee: […] — 1590 formsdeformed · deforming · deformeth · deforms · deformest · more deform · most deform