Prorogation refers to the formal end of a legislative session by the head of state through a proclamation. This ends all parliamentary business until the legislature is reconvened at a later date. Dissolution, on the other had, refers to the complete termination of a legislature usually leading to new elections. A plebiscite is a direct vote by the people on a specific issue or law that may not necessarily be implemented. A summons refers to the act of formally calling members of a legislature to meet, not ending a session.