Meaning of the word "river basin" in English

What does "river basin" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

river basin

US /ˈrɪvər ˌbeɪsɪn/
UK /ˈrɪvə ˌbeɪsɪn/

Noun

the area of land drained by a river and its tributaries

Example:
The Amazon river basin is the largest in the world.
Many ancient civilizations developed along fertile river basins.