from The American Heritage® Dictionary of the English Language, 4th Edition
- A thoroughfare of Westminster in London, England, off Whitehall. No. 10 Downing Street is the official residence of the first lord of the Treasury, who is usually but not necessarily the prime minister of Great Britain. Nearly all prime ministers have lived at No. 10 since the time of Robert Walpole in the early 1700s.
- n. The British government.
Sorry, no etymologies found.