Collins COBUILD Advanced Learner's English Dictionary - upper house

(Upper Houses) 1. In Britain, the Upper House is the House of Lords. The decision was announced after objections were raised in the Upper House of Parliament. N-PROPER 2. In the United States, the Upper House is the Senate. N-PROPER 3. In other countries where the parliament is divided into two groups of members, the Upper House is the more senior of these groups, although it may not be more powerful. The Upper House of the German parliament is to meet today in Berlin. N-COUNT: also N-PROPER