Definition of "confidential" []

• Done or communicated in confidence; secret. (adjective)
• Entrusted with the confidence of another: a confidential secretary. (adjective)
• Denoting confidence or intimacy: a confidential tone of voice. (adjective)
• Containing information, the unauthorized disclosure of which poses a threat to national security. (adjective)
• Spoken, written, or given in confidence; secret; private (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• Entrusted with another's confidence or secret affairs (adjective)
• Suggestive of or denoting intimacy (adjective)

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• "Because keeping the supply chain confidential is so important to buyers, they try to impose confidentiality on their suppliers."
• "Informants give you information in the public interest and say that their career, liberty or life depend on keeping their name confidential."
• "Obeid said the SPLM violated provisions of the CPA by signing what he described as confidential agreements with the U.S. government."