ˌUpper ˈHouse BrE AmE noun [countable usually singular]
a group of representatives in a country’s parliament, that is smaller and less powerful than the country’s ↑ Lower House , for example the British House of Lords
UPPER HOUSE
Meaning of UPPER HOUSE in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012