noun Physical Geography.
Origin of river basin
Examples from the Web for river basin
The lower part of the river-basin was inhabited by the Angrivarii.
With these replaced, and the supplies of petrol and oil replenished, we flew south during the afternoon to the river-basin of war.Cavalry of the Clouds|Alan Bott
Lifting up his eyes, Daniel sees a ram standing eastward of the river-basin.
Daniel sees a ram standing eastward of the river-basin of the Ulai, having two horns, of which one is higher than the other.