The Open Dictionary

drainage basin

noun

UK/ˈdreɪ.nɪdʒ ˌbeɪ.sᵊn/
US/ˈdreɪ.nɪdʒ ˌbeɪ.sᵊn/

Definitions of drainage basin noun

  1. Countablegeography

    An area of land where all surface water from rain converges to a specific river, lake, or other body of water.

    • The city's drainage system design needs to consider the entire drainage basin.

    • The drainage basin of this river is vast, covering several provinces.

    • Climate change has had a significant impact on water resource management in the drainage basin.