From Longman Dictionary of Contemporary EnglishUpper HouseˌUpper ˈHouse noun [countable usually singular] PPa 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
Examples from the Corpus
Upper House• An upper house representing regional leaders is to be created two years after independence.• Although the upper house may reject it again, the Government can now invoke the Parliament Act to force the measure through.• Any proposal will be in trouble if it has to be approved by the upper house of parliament as well as the lower house.• And throughout they dominated the State Council, the upper house endowed with effective veto powers over Duma proposals.• Pinochet and who hold the swing vote in the upper house.• Yet both have two votes in the upper house.• They successfully tied up the upper house in endless debate. 