WATERSHED

• (noun) 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"

  synonyms : landmark , turning point

• (noun) 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"

  synonyms : basin , catchment area , catchment basin , drainage area , drainage basin , river basin

• (noun) a ridge of land that separates two adjacent river systems

  synonyms : divide , water parting

WordNet® 3.0, © 2006 by Princeton University.

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