Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun watershed

3 senses of watershed

Sense 1
watershed, water parting, divide -- (a ridge of land that separates two adjacent river systems)
       => line -- (a spatial location defined by a real or imaginary unidimensional extent)

Sense 2
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")
       => geographical area, geographic area, geographical region, geographic region -- (a demarcated area of the Earth)

Sense 3
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")
       => juncture, occasion -- (an event that occurs at a critical time; "at such junctures he always had an impulse to leave"; "it was needed only on special occasions")