• (RP) IPA: /ɪmˈpɹɒp.ə/
  • (Australia) IPA: /ɪmˈpɹɔp.ə/
  • (America) IPA: /ɪmˈpɹɑ.pɚ/


  1. unsuitable to needs or circumstances; inappropriate; inapt
  2. Not in keeping with conventional mores or good manners; indecent or immodest
  3. Not according to facts; inaccurate or erroneous
  4. Not consistent with established facts; incorrect
  5. Not properly named; See, for example, improper fraction
  6. (obsolete) Not specific or appropriate to individuals; general; common.
    • Not to be adorned with any art but such improper ones as nature is said to bestow, as singing and poetry.
Translations Translations Translations Translations Translations Verb

improper (impropers, present participle impropering; past and past participle impropered)

  1. (obsolete, transitive) To appropriate; to limit.
    • He would in like manner improper and inclose the sunbeams to comfort the rich and not the poor.
  2. (obsolete) To behave improperly

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