American English

Definition of improper adjective from the Oxford Advanced American Dictionary



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  1. 1dishonest or morally wrong improper business practices improper conduct There was nothing improper about our relationship. opposite proper
  2. 2(formal) not 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
adverb to behave improperly He was improperly dressed for the occasion. improperly cooked meat
See the Oxford Advanced Learner's Dictionary entry: improper

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