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



    BrE BrE//ˌʌnˈtriːtɪd//
    ; NAmE NAmE//ˌʌnˈtriːtɪd//
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  1. 1not receiving medical treatment If untreated, the illness can become severe.
  2. 2(of substances) not made safe by chemical or other treatment untreated sewage
  3. 3(of wood) not treated with substances to preserve it
See the Oxford Advanced American Dictionary entry: untreated