CATTEGAT or KATTEGAT (Scand. "cat's-throat"), a strait forming part of the connection between the Baltic and the North Seas. It lies north and south between Sweden and Den mark, and connects north with the Skagerrack and south through the Sound. Great Belt and Little Belt with the Baltic Sea. Length about 150 m., extreme breadth about 88 m., area 9,84o sq.m., mean depth not more than about 14 fathoms. (See BALTIC.)