Illyrian UK /ɪˈlɪəɹɪən/US /ɪˈlɪəɹiən/noun 5adjective 3forms 1 noun5 •An inhabitant of ancient Illyria. •An inhabitant of Roman province of Illyricum (Illyro-Roman). •(historical) A member of the Illyrian movement, a pan-South-Slavic cultural and political campaign. •A Proto-Albanian. •(no longer used) A South Slav, especially a Croat, used in 17th-19th centuries. adjective3 •Of or pertaining to Illyria or Illyrians. •Of or in the Illyrian language. •(no longer used, historical) Of or in the Serbo-Croatian language.Scholars divide the great bulk of the Slavic languages into two branches […] The south-eastern or eastern division contains the Russian, Bulgarian, and Illyrian languages — 1855 formsIllyrians