defect in WordNet English dictionary

1. a mark or flaw that spoils the appearance of something (especially on a person's body)
   "a facial blemish"
   blemish  defect  mar 
   
2. a failing or deficiency
   "that interpretation is an unfortunate defect of our lack of information"
   defect  shortcoming 
   
3. an imperfection in an object or machine
   "a flaw caused the crystal to shatter"; "if there are any defects you should send it back to the manufacturer"
   defect  fault  flaw 
   
4. an imperfection in a bodily system
   "visual defects"; "this device permits detection of defects in the lungs"
   defect 
   

1. desert (a cause, a country or an army), often in order to join the opposing cause, country, or army
   "If soldiers deserted Hitler's army, they were shot"
   defect  desert