confidential

Adjective

• the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified

• denoting confidence or intimacy
  • a confidential approach
    
  • in confidential tone of voice
    

• (of information) given in confidence or in secret
  • this arrangement must be kept confidential
    
  • their secret communications
    

• entrusted with private information and the confidence of another
  • a confidential secretary