the longest river in England; flows eastward through London to the North Sea
"The Thames, being the longest river in England, flows eastward through London before emptying into the North Sea."
A river in southern England, flowing 336 km (209 mi.) from Gloucestershire, through Wiltshire, Oxfordshire, Berkshire, Buckinghamshire, Surrey and Greater London to the Thames Estuary and North Sea.
"The historic city of Windsor sits on the banks of the Thames as it winds its way toward the sea."
The name Thames comes from the Latin Tamesis, which was borrowed into English via Old and Middle English. Its ultimate origin is a Celtic word meaning "river" or "waters," likely derived from a root referring to darkness.