RurikPronunciation: /ˈrʊərɪk/ (also Ryurik)Definition of Rurik noun a member of a dynasty that ruled Muscovy and much of Russia from the 9th century until the death of Fyodor, son of Ivan the Terrible, in 1598. It was reputedly founded by a Varangian chief who settled in Novgorod in 862. adjective relating to the Ruriks. Rurik in other Oxford dictionaries Definition of Rurik in the US English dictionary