Definition of criminal adjective from the Oxford Advanced American Dictionary

      

    criminal

     adjective
    adjective
    NAmE//ˈkrɪmənl//
     
     
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  1. 1[usually before noun] connected with or involving crime criminal offenses/behavior criminal damage (= the crime of damaging someone's property deliberately) criminal negligence (= the illegal act of someone failing to do something that they should do, with the result that someone else is harmed)
  2. 2[only before noun] connected to the laws that deal with crime criminal law the criminal justice system a criminal lawyer to bring criminal charges against someone compare civil
  3. 3morally wrong This is a criminal waste of resources.
See the Oxford Advanced Learner's Dictionary entry: criminal