CONFIDENTIAL
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
confidential
(adjective) denoting confidence or intimacy; “a confidential approach”; “in confidential tone of voice”
confidential, secret
(adjective) (of information) given in confidence or in secret; “this arrangement must be kept confidential”; “their secret communications”
confidential
(adjective) entrusted with private information and the confidence of another; “a confidential secretary”
Source: WordNet® 3.1
Etymology
Adjective
confidential (comparative more confidential, superlative most confidential)
Kept, or meant to be kept, secret within a certain circle of persons; not intended to be known publicly
Synonyms: private, classified, off the record, privileged, secret, dern (obsolete)
Antonyms: public, on the record
(dated) Inclined to share confidences; (of things) making people inclined to share confidences; involving the sharing of confidences.
(dated) Having someone's confidence or trust; having a position requiring trust; worthy of being trusted with confidences.
Source: Wiktionary
Con`fi*den"tial, a. Etym: [Cf. F. confidentiel.]
1. Enjoying, or treated with, confidence; trusted in; trustworthy;
as, a confidential servant or clerk.
2. Communicated in confidence; secret. "Confidential messages."
Burke. 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.
Source: Webster’s Unabridged Dictionary 1913 Edition