The Upper House refers to the legislative body that represents the upper chamber of a bicameral legislative system. It is also known as the senate or the house of lords, depending on the country's constitution. The Upper House generally has a smaller membership than the lower house, with members who are appointed or elected through a longer-term than the lower house. Other synonyms for the Upper House include the higher chamber, the upper legislative branch, or the upper house of parliament. However, the term Upper House remains most widely used and has become a standard reference to such legislative structures globally.