abbreviation for non-disclosure agreement: a legal document stating that someone will not tell anyone certain private information, especially about the company they work for

I think it's smart that she's had employees sign NDAs. 我觉得她让雇员签署保密协议是明智的做法。

Never provide confidential information without an NDA. 如果要提供机密信息，一定要先签署保密协议。