Definition of ill-defined adjective from the Oxford Advanced Learner's Dictionary

     

    ill-defined

     adjective
    adjective
    BrE
     
    ; NAmE
     
     
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  1. 1not clearly described an ill-defined role The precise aims of the committee remain ill-defined.
  2. 2not clearly marked or easy to see an ill-defined path
  3. opposite well defined
See the Oxford Advanced American Dictionary entry: ill-defined