What does basin mean in geography?

Answer 1

The land area that is drained by a river and its tributaries. The Mississippi River basin, for example, is a vast area that covers much of the central United States from the central ranges of the Appalachian Mountains in the east to the eastern ranges of the Rocky Mountains in the west, funneling toward its delta in southern Louisiana and emptying into the Gulf of Mexico.

Answer 2

In geography, a basin is a low-lying area surrounded by higher land, often shaped like a bowl. It collects water from rivers and streams, and can be natural or artificial. Basins can range in size from small, local ones to large, regional ones like the Amazon Basin.