a large river or rather estuary of England, formed by the junction of the Ouse and Trent, and separating Yorkshire from Lincolnshire. It flows first E. for about 18 miles to Hull, and then S.E. for 22 miles to its mouth between the Spurn-head on the N., and the opposite coast of Lincoln on the S. Its average breadth is from 2 to 3 miles, but near its mouth it widens to 6 or 7. By means of its numerous tributaries it drains about 10,000 square miles, comprising some of the most fertile and populous districts of England. Vessels of considerable burden can ascend to its head, and those of the largest size to Hull.