Definition of unhealthy adjective from the Oxford Advanced Learner's Dictionary

     

    unhealthy

     adjective
    adjective
    BrE BrE//ʌnˈhelθi//
     
    ; NAmE NAmE//ʌnˈhelθi//
     
    Diet, Poor health, Unhealthy eating habits, Being ill
     
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  1. 1not having good health; showing a lack of good health They looked poor and unhealthy. unhealthy skin His eyeballs were an unhealthy yellow. See related entries: Poor health, Being ill
  2. 2harmful to your health; likely to make you ill/sick unhealthy living conditions an unhealthy diet/lifestyle See related entries: Diet, Unhealthy eating habits
  3. 3not normal and likely to be harmful synonym unwholesome He had an unhealthy interest in disease and death.
  4. opposite healthy
    Extra examples The miners worked in very unhealthy conditions. Doctors say too many teenagers adopt an unhealthy lifestyle. Just taking vitamin tablets will not turn an unhealthy diet into a good one. The unhealthy climate made it an unattractive place in which to settle. Tuberculosis often affects people in unhealthy living conditions.
See the Oxford Advanced American Dictionary entry: unhealthy