From Longman Dictionary of Contemporary Englishconfidentialitycon‧fi‧den‧ti‧al‧i‧ty /ˌkɒnfədenʃiˈæləti $ ˌkɑːn-/ ●○○ noun [uncountable]SECRETa situation in which you trust someone not to tell secret or private information to anyone else
The relationship between attorney and client is based on confidentiality.breach of confidentiality (=when someone gives away information they have promised to keep secret)
It’s a breach of confidentiality for a priest to reveal what someone has said in the confessional.Examples from the Corpusconfidentiality• Data encryption ensures the privacy and confidentiality of emailmessages.• Pleaseforward the profile to your client, together with the attachedconfidentialityletter.• Alexander declinedcomment, citing attorney-client confidentiality.• Alexander declined to comment, citing attorney--client confidentiality.• Researchers should always be able to guaranteecompleteconfidentiality for their subjects.• But congressional investigators said bankclaims of confidentiality kept them from establishing precisely how much profit banks are reaping from the surcharges.• The healthclinic has again been caughtviolatingpatientconfidentiality.• The purchaser should be prepared to sign a target's confidentialityundertaking.• Short confidentialityclauses in standard conditions are really only precautionarymeasures to be relied upon in an emergency.• Information memoranda should not be sent to interested parties until a signed confidentiality letter has been received.• The appropriatemethod will depend on the business being sold, the confidentialityrequired, and the anticipateddemand from purchasers.• The confidentiality letter should cover both the memorandum and also any additional information which might be subsequently released.breach of confidentiality• It is the client's business that may be damaged by a breach of confidentiality.• It is a breach of confidentiality for a priest to reveal what someone has confessed.• Any breach of confidentiality concerning their children is something they have to nip in the bud right now.• The Act provides protection from suits by clients or employers for breaches of confidentiality.From Longman Business Dictionaryconfidentialitycon‧fi‧den‧ti‧al‧i‧ty /ˌkɒnfədenʃiˈælətiˌkɑːn-/ noun [uncountable]the practice of keeping private information secretHe raised concerns that departmental confidentiality had been breached.a confidentiality agreement