watershed   (Sound)

The noun watershed has 3 senses

• watershed, water parting, divide -- (a ridge of land that separates two adjacent river systems)


• river basin, basin, watershed, drainage basin, catchment area, catchment basin, drainage area -- (the entire geographical area drained by a river and its tributaries; an area characterized by all runoff being conveyed to the same outlet; "flood control in the Missouri basin")


• landmark, turning point, watershed -- (an event marking a unique or important historical change of course or one on which important developments depend; "the agreement was a watershed in the history of both nations")