What does confidentiality mean?
Confidentiality refers to the practice or obligation of keeping sensitive information private and protected from unauthorized disclosure. It is central to many professional fields: doctors, lawyers, journalists, therapists, and financial advisers all operate under codes that require them to safeguard what clients or patients reveal to them. A breach of confidentiality can carry serious legal, ethical, and reputational consequences. Beyond these formal settings, the word also describes any situation where information is deliberately kept restricted — from trade secrets to personal conversations. Confidentiality implies trust: the person sharing information expects it will not be passed on. The term derives from the Latin confidere, meaning 'to trust fully', reflecting how deeply the concept is tied to reliance on another person's discretion. In an era of data protection laws, encrypted messaging, and privacy debates, confidentiality has become one of the most consequential words in modern professional and public life.
The obligation to protect entrusted information from unauthorized disclosure, especially in professional, legal, or medical contexts.
"Solicitors must respect client confidentiality at all times."
The quality or state of being private, secret, or restricted in access.
"The confidentiality of the negotiations was essential to their success."
Break a doctor's confidentiality and you could lose your licence — but break a friend's and you may just lose the friendship. The word covers both, from courtrooms to group chats.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of confidentiality
Confidentiality derives from the Latin confidere, meaning 'to trust fully', formed from com- ('with, together') and fidere ('to trust'), itself rooted in fides, meaning 'faith' or 'trust'. The adjective 'confidential' entered English in the mid-18th century, and 'confidentiality' was formed later as its noun derivative. Cognates sharing this Latin root include 'confide', 'confidence', 'confidant', and 'fidelity'.
Related word forms
How confidentiality is actually used
A formal register word, common in legal, medical, corporate, and journalistic contexts. It carries an inherently positive connotation of trustworthiness and ethical duty. In everyday speech, 'privacy' or 'keeping something confidential' is more common.
Easily confused with confidentiality
Confidence is trust or certainty in someone or something, while confidentiality is the duty or practice of keeping information private.