a town of the hundred of the same name in the county of Gloucester, 124 miles from London. It is situated on a small stream that falls into the Severn, and consists of one street about half a mile long, with a large church resembling a cathedral, and the remains of a magnificent palace, begun, but never finished, by the duke of Buckingham in 1511. Thornbury is an ancient borough, and has a market on Saturday. The inhabitants amounted in 1821 to 2764, and in 1831 to 4375.