Definition of confidential adjective from the Oxford Advanced American Dictionary

     

    confidential

     adjective
    adjective
    NAmE//ˌkɑnfəˈdɛnʃl//
     
     
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  1. 1meant to be kept secret and not told to or shared with other people confidential information/documents Your medical records are strictly confidential (= completely secret).
  2. 2(of a way of speaking) showing that what you are saying is private or secret He spoke in a confidential tone, his voice low.
  3. 3[only before noun] trusted with private or secret information a confidential secretary
confidentially
 
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NAmE//ˌkɑnfəˈdɛnʃəli//
 
adverb She told me confidentially that she is going to retire early. He leaned forward confidentially over the desk toward me.
See the Oxford Advanced Learner's Dictionary entry: confidential