noun

• The abbey of Westminster
• The City of Westminster: a London borough of Greater London including the principal offices of the British government.
• A neighbourhood in central London; the administrative centre of borough of Westminster.
• The Palace of Westminster
• (colloquial, metonymically) The British parliament, based at the Palace of Westminster
• A city, the county seat of Carroll County, Maryland, United States.
• A city in Orange County, California, United States.
• An English dukedom.