Definition of upper house noun from the Oxford Advanced Learner's Dictionary

 

upper house

 noun
noun
BrE
 
; NAmE
 
(also upper chamber)(also second chamber especially in British English)[singular] Parliament
 
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one of the parts of a parliament in countries which have a parliament that is divided into two parts. In Britain it is the House of Lords and in the US it is the Senate. compare lower house See related entries: Parliament
See the Oxford Advanced American Dictionary entry: upper house