drainage basin

Noun drainage basin has 1 sense

• drainage basin(n = noun.location) basin, catchment area, catchment basin, drainage area, river basin, watershed - 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"
has particulars: detention basin, retention basin
is a kind of geographic area, geographic region, geographical area, geographical region