What is Confidentiality?

Confidentiality definition and meaning on Dictionary terms:
spoken, written, acted on, etc., in strict privacy or secrecy; secret: a confidential remark.
indicating confidence or intimacy; imparting private matters: a confidential tone of voice.
having another’s trust or confidence; entrusted with secrets or private affairs: a confidential secretary.
(of information, a document, etc.) bearing the classification confidential, usually being above restricted and below secret. limited to persons authorized to use information, documents, etc., so classified.Compare classification(def 5).