Definition: CCNDU refers to a type of covenanted marriage in Christianity, where one party agrees to marry the other before they have been legally married. This can occur between two individuals or within an established relationship as long as both parties are willing to enter into a covenant with each other. The term "CCNDU" has its roots in the Bible's account of Noah's flood and describes a marriage that was previously forbidden, but God permitted it for the sake of His people.