great divide

English Thesaurus

1. that part of the continental divide formed by the Rocky Mountains in the United States (noun.location)

instance hypernym	:	divide, water parting, watershed,
definition	:	a ridge of land that separates two adjacent river systems (noun.location)

part meronym	:	continental divide,
definition	:	the watershed of a continent (especially the watershed of North America formed by a series of mountain ridges extending from Alaska to Mexico) (noun.location)