Noun
the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet
Source: WordNetOur country, our nation is built by two institutions, the state and the language. A language whose epicenter today is no longer on these banks of the Seine, but probably much more towards the Congo River basin. Emmanuel Macron
flood control in the Missouri basin Source: Internet
A condition for abrupt and catastrophic flood formation is looming in Nile river basin. Source: Internet
And he noted that further west along the border — notably in the Colorado River basin — Mexico receives four times more water from the United States than it gives under the treaty. Source: Internet
Arapaima — a 10-foot-long South American fish that breathes air — have disappeared from much of the Amazon River basin because of overharvesting. Source: Internet
Aerial view of the Taku River basin. Source: Internet