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Noun: catchment basin  'kach-munt 'bey-sun
  1. The entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
    "flood control in the Missouri catchment basin";
    - 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