confidential
1. [ adjective ] entrusted with private information and the confidence of another
Examples:

"a confidential secretary"

Related terms: private
2. [ adjective ] denoting confidence or intimacy
Examples:

"a confidential approach" "in confidential tone of voice"

Related terms: close
3. [ adjective ] (of information) given in confidence or in secret
Synonyms: secret closet
Examples:

"closet information" "this arrangement must be kept confidential" "their secret communications"

Related terms: private
4. [ adjective ] the level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified
Related terms: classified
Similar spelling:   confidentially
  confidentiality
  confident
  confidently
  confidant
  confidence
  confidence_man
  confidingly
  confiding
  connive_at
  confidante
  confidence_game