The River Clyde (, , ) is a river in Scotland. It is the eighth longest river in the United Kingdom, and the second longest in Scotland. Flowing through the major city of Glasgow, it was an important river for shipbuilding and trade in the British Empire. In the early medieval Cumbric language it was known as Clud or Clut, and was central to the Kingdom of Strathclyde (Teyrnas Ystrad Clut).