Chuvashia Syllabification: (Chu·vash·ia)Pronunciation: /CHo͞oˈväSHēə/Definition of Chuvashia an autonomous republic in Russia, in Europe east of Nizhni Novgorod; population 1,278,600 (est. 2009); capital, Cheboksary. Chuvashia in other Oxford dictionaries Definition of Chuvashia in the British & World English dictionary