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Adjective: defective  di'fek-tiv
  1. Having a defect
    "I returned the appliance because it was defective"
    - faulty
     
  2. Markedly subnormal in structure or function or intelligence or behaviour
    "defective speech"
     
  3. Not working properly
    "a defective appliance"
    - bad

See also: abnormal, defectively, defectiveness, imperfect, malfunctioning, nonfunctional, unnatural

Encyclopedia: Defective