Slavonian UK /sləˈvəʊ.ni.ən/US /sləˈvoʊ.ni.ən/adjective 2noun 1forms 3 adjective2 •Of or relating to Slavonia or its inhabitants. •Of or relating to the Slavs or their language. noun1 •A native or inhabitant of Slavonia. formsSlavonians · more Slavonian · most Slavonian