It's called an estuary, or in Scotland, a firth.
Where it spreads out into a muddy triangle, it's called a delta.
idaho
The widest part of the Colorado River is near Lake Havasu in Arizona, where it can reach up to 1 mile (1.6 kilometers) in width.
The widest river in the world is the Amazon River. The second widest river in the world is the Nile River, which is the longest river in the world.
The widest part of a ship is called the "Greatest breadth". It has to do with the width of the beam.
The diameter
the widest river in fiji
The widest river in the world is the Amazon River in South America.
The River Severn is over 50 kilometers wide at its widest point near the city of Bristol. This is equal to about 31 miles.
At it's widest point the Danube River is 1.5km (0.93 miles(1,640 yards)) wide.
At the mouth, Ilwaco, WA. Its 8 miles wide.
Yes, it is the widest.
It has a common name: the ball.