upper tunguska is a noun meaning "a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River". It carries one recorded sense.
a river in southeastern Siberia that flows northwest from Lake Baikal to become a tributary of the Yenisei River
Definitions, synonyms and semantic relations for upper tunguska come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.