Webster’s Revised Unabridged Dictionary · 1913
Confidential
Con′fi·den′tial (kŏn′fĭ·dĕn′shal), a. [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.