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

     

    improper

     adjective
    adjective
    BrE BrE//ɪmˈprɒpə(r)//
     
    ; NAmE NAmE//ɪmˈprɑːpər//
     
    (formal) Immoral
     
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  1. 1dishonest, or morally wrong improper business practices improper conduct There was nothing improper about our relationship (= it did not involve sex). opposite proper See related entries: Immoral
  2. 2not suited or appropriate to the situation synonym inappropriate It would be improper to comment at this stage. opposite proper
  3. 3wrong; not correct improper use of the drug
  4. Word Origin late Middle English: from French impropre or Latin improprius, from in- ‘not’ + proprius ‘one's own, proper’.Extra examples places where it is considered improper for men and women to kiss in public He had been indulging in improper business practices. She was suspended for improper conduct. There was nothing improper about our relationship.
See the Oxford Advanced American Dictionary entry: improper

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