Snowdonian UK /snəʊˈdəʊ.ni.ən/US /snoʊˈdoʊ.ni.ən/adjective 1noun 1forms 3 adjective1 •Of or relating to Snowdonia. noun1 •A native or inhabitant of Snowdonia. formsSnowdonians · more Snowdonian · most Snowdonian