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Từ điển WordNet v3.1 - WordNet Dictionary
watershed


noun
1. a ridge of land that separates two adjacent river systems (Freq. 1)
Syn:
water parting, divide
Derivationally related forms:
divide (for: divide)
Hypernyms:
line
Hyponyms:
continental divide
Instance Hyponyms:
Great Divide
2. 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
Syn:
river basin, basin, drainage basin, catchment area, catchment basin, drainage area
Hypernyms:
geographical area, geographic area, geographical region, geographic region
Hyponyms:
detention basin, retention basin
3. 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
Syn:
landmark, turning point
Hypernyms:
juncture, occasion
Hyponyms:
Fall of Man, road to Damascus

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