IllyrianPronunciation: /ɪˈlɪrɪən/Definition of Illyrian adjective 1relating to the ancient region of Illyria:Illyrian tribes 2of or denoting the branch of Indo-European languages represented by modern Albanian. noun 1a native or inhabitant of ancient Illyria. 2 [mass noun] the branch of the Indo-European family of languages represented by modern Albanian. Illyrian in other Oxford dictionaries Definition of Illyrian in the US English dictionary