Romanov Syllabification: (Ro·ma·nov)Pronunciation: /rōˈmänˌôf, ˈrōməˌnôf/Definition of Romanov a dynasty that ruled in Russia from the accession of Michael Romanov (1596–1645) in 1613 until the overthrow of the last tsar, Nicholas II, in 1917. Romanov in other Oxford dictionaries Definition of Romanov in the British & World English dictionary