'Confidential' definitions:

Definition of 'confidential'

(from WordNet)
adjective
Entrusted with private information and the confidence of another; "a confidential secretary"
adjective
(of information) given in confidence or in secret; "this arrangement must be kept confidential"; "their secret communications" [syn: confidential, secret]
adjective
Denoting confidence or intimacy; "a confidential approach"; "in confidential tone of voice"
adjective
The level of official classification for documents next above restricted and below secret; available only to persons authorized to see documents so classified

Definition of 'Confidential'

From: GCIDE
  • Confidential \Con`fi*den"tial\, a. [Cf. F. confidentiel.]
  • 1. Enjoying, or treated with, confidence; trusted in; trustworthy; as, a confidential servant or clerk. [1913 Webster]
  • 2. Communicated in confidence; secret. "Confidential messages." --Burke. [1913 Webster]
  • Confidential communication (Law) See {Privileged communication}, under Privileged.
  • Confidential creditors, those whose claims are of such a character that they are entitled to be paid before other creditors.
  • Confidential debts, debts incurred for borrowed money, and regarded as having a claim to be paid before other debts. --McElrath. [1913 Webster]

Definition of 'confidential'

From: GCIDE
  • classified \classified\ adj.
  • 1. arranged into classes or categories; as, unclassified.
  • Syn: categorized. [WordNet 1.5 +PJC]
  • 2. assigned to a class of documents withheld from general circulation; -- of information or documents. Opposite of unclassified.
  • Note: [Narrower terms: eyes-only; confidential; restricted; secret; sensitive; top-secret] [WordNet 1.5]

Synonyms of 'confidential'

From: Moby Thesaurus