inadmissible Syllabification: (in·ad·mis·si·ble)Pronunciation: /inədˈmisəbəl/Translate inadmissible | into Italian Definition of inadmissible adjective 1(especially of evidence in court) not accepted as valid. 2not to be allowed or tolerated:an inadmissible interference in the affairs of the ChurchDerivatives inadmissibility noun inadmissibly adverb inadmissible in other Oxford dictionaries Definition of inadmissible in the British & World English dictionary