[{"Bold_text": "noun", "List Items": ["a shortcoming, fault, or imperfection:a defect in a machine.a defect in an argument;a defect in a machine.", "lack or want, especially of something essential to perfection or completeness; deficiency :a defect of action.a defect of common sensea defect of action.", "Also calledcrystal defect,Crystallography.a discontinuity in the lattice of a crystal caused by missing or extra atoms or ions, or by dislocations."]}, {"Bold_text": "verb (used without object)", "List Items": ["to desert a cause, country, etc., especially in order to adopt another (often followed byfromorto):He defected from the U.S.S.R. to the West."]}]