Novosibirsk Syllabification: (No·vo·si·birsk)Pronunciation: /ˌnōvəsiˈbirsk/Definition of Novosibirsk a city in Russia, in central Siberia, west of the Kuznets Basin, on the Ob River; population 1,390,500 (est. 2008). Novosibirsk in other Oxford dictionaries Definition of Novosibirsk in the British & World English dictionary