- an estuary of the Ouse and Trent rivers in E England. 37 miles (60 km) long.
- an estuary in NE England, into which flow the Rivers Ouse and Trent: flows east into the North Sea; navigable for large ocean-going ships as far as Hull; crossed by the Humber Bridge (1981), a single-span suspension bridge with a main span of 1410 m (4626 ft). Length: 64 km (40 miles)
