Noun: catchment basin 'kach-munt 'bey-sun
- The entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
"The Amazon catchment basin covers over 7 million square kilometres";
- river basin, basin, watershed, drainage basin, catchment area, drainage area
Derived forms: catchment basins
Type of: geographic area, geographic region, geographical area, geographical region
Encyclopedia: Catchment basin