watershed
n. 1 line of separation between waters flowing to different rivers, basins, etc. 2 turning-point in affairs. [from shed ridge]
n. The whole region or extent of country which contributes to the supply of a river or lake.
n. 1 line of separation between waters flowing to different rivers, basins, etc. 2 turning-point in affairs. [from shed ridge]
n. The whole region or extent of country which contributes to the supply of a river or lake.