The upper house, often called a 'Senate', in politics, refers to the highest chamber in a legislature that is bicameral, the other being the lower house. Characteristics and functions of such institutions vary widely, but generally the upper house in a parliamentary system wields less power, and in a presidential system will be of equal or possibly greater import.
A legislature comprised of only one house is called unicameral.
Some countries have a tri- or even quadricameral system: here, the upper house will usually remain the highest chamber in a legislature.
List of Upper House chambers
|Carchesia||Bicameral||Senate of the Republic|
|Ineland||Bicameral||Comhairle na hÁineann|
|Imperial Lyndonia and Montefalco||Bicameral|| Kraignow |
(House of Councillors)
|Omerica||Bicameral||House of Councillors|
|Providence and Port Hope||Bicameral||Senate|
|State of Germany||Bicameral||Bundesrat|