NDD expired refers to the expiration of a Non-Disclosure Agreement (NDD), which is a legally binding contract between two or more parties that outlines the confidential information they agree to share with each other. When an NDD expires, the parties are no longer bound by the terms of the agreement and are free to disclose the previously confidential information to others. This can occur after a specified period of time or upon the fulfillment of certain conditions outlined in the NDD. It is important to note that even after an NDD has expired, the parties may still be obligated to keep certain information confidential if it falls under other legal protections, such as trade secrets or intellectual property laws.