The geographical area served by a particular government agency, health facility, etc.
The entire region draining into a river, river system, or other body of water:
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.
A washbowl; a sink.
Find another word for drainage-basin. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for drainage-basin, like: catchment area, catchment-basin, drainage area, watershed, river-basin and basin.