nondisclosure agreement

Definition from Nolo’s Plain-English Law Dictionary

A legally binding contract (also known as an NDA or confidentiality agreement) in which a person or business promises to treat specific information as a trade secret and not disclose it to others without proper authorization. Nondisclosure agreements are often used when a business discloses a trade secret to another person or business for such purposes as development, marketing, evaluation, or securing financial backing. A nondisclosure agreement will not protect trade secrets if the trade secret owner has not taken reasonable steps to keep the information secret.

Definition provided by Nolo’s Plain-English Law Dictionary.