Joint and Several Liability means that each of the people or organisation (joint partner) has a responsible liability together and in separation liability. The liability for default is under all participants as a group organisation (joint), or each person or partner as an individual has the entire contractual liability to be selected by the creditor, so a creditor could recover a whole debt from any one of them individually, and that person or partner to recover their shares from the rest of the partners.
Related Definitions in the Project: The Project Management; Project Contract