Confidential 1Definition: Enjoying, or treated with, confidence; trusted in; trustworthy; as, a confidential servant or clerk.
Confidential 2Definition: Communicated in confidence; secret.
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; "closet information"; "this arrangement must be kept confidential"; "their secret communications"
entrusted with private information and the confidence of another; "a confidential secretary"