Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun drainage_basin

1 sense of drainage basin

Sense 1
river basin, basin, watershed, drainage basin, catchment area, catchment basin, drainage area -- (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 basin")
       => geographical area, geographic area, geographical region, geographic region -- (a demarcated area of the Earth)