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Definition of Athabasca

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Ath·a·bas·ca or Ath·a·bas·ka  audio  (th-bsk) KEY 

A river rising in the Rocky Mountains of southwest Alberta, Canada, and flowing about 1,231 km (765 mi) east and north to Lake Athabasca on the border of northern Alberta and Saskatchewan. The river and lake are important constituents of the Mackenzie River system.

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