Definitions for "Joint Session"
A joint meeting of the senate and the assembly.
A combined meeting of the Senate and House in one chamber.
The combined meeting of the Senate and General Assembly for such purposes as receiving the Governor's annual "State of the State" and budget messages and other addresses by the Governor or distinguished visitors, and to hold special commemorative ceremonies.  Also, the Constitution provides that the two houses meet in joint session when appointing the State Auditor.
Where the parties discuss the preliminary issues and answer questions the mediator may have, and often, questions from the other parties.