1) A confidentiality agreement (also known as a non-disclosure agreement or NDA) should be signed before giving away any business sensitive information. The agreement will normally provide that the information given is confidential, should only be used for the stated purpose, should not be shown to anyone else and should be returned or destroyed if the purpose for its use ends.
2) Also known as non-disclosure agreement. An agreement requiring one party to keep certain information disclosed in the course of a transaction or period of employment confidential and to use that information only for the particular purpose for which it is disclosed.
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3) A confidentiality agreement (also known as a non-disclosure agreement or NDA) should be signed before giving away any business sensitive information. The agreement will normally provide that the information given is confidential, should only be used for a stated purpose, should not be shown to anyone else and should be returned or destroyed if the deal does not go ahead.
Practical Law Dictionary. Glossary of UK, US and international legal terms. www.practicallaw.com. 2010.