NovosibirskPronunciation: /ˌnəʊvəsɪˈbɪəsk/Definition of Novosibirsk a city in central Siberian Russia, to the west of the Kuznets Basin, on the River Ob; population 1,390,500 (est. 2008). Novosibirsk in other Oxford dictionaries Definition of Novosibirsk in the US English dictionary