upper house
noun [ C usually singular ] uk/ˌʌp.ə ˈhaʊs/ us/ˌʌp.ɚ ˈhaʊs/ (also upper chamber)
（英国）上议院;（美国）参议院
one of the two parts that some parliaments are divided into
In the UK, the upper house is the House of Lords. 在英国，上议院又称贵族院。
The upper house of the US Congress is the Senate. 美国议会的“上院”是参议院。
Compare: lower house