Added 9 October 2026 westminster noun Categories: PlacesUncommon Words noun ! Definition from WordNet 3.1, Princeton University. More about westminster at Wordnik → Where our words come from → A borough of Greater London on the Thames; contains Buckingham Palace and the Houses of Parliament and Westminster Abbey. Related Words: abbeybritishlordsparliamentcommonsgovernmentwhitehalllegislatureminster Back to today's word