Barcelonian UK /ˌbɑː.səˈləʊ.ni.ən/US /ˌbɑɹ.səˈloʊ.ni.ən/adjective 1noun 1forms 1 adjective1 •Of, from or relating to the city of Barcelona, capital of Catalonia, Spain. noun1 •A native or inhabitant of the city of Barcelona, capital of Catalonia, Spain. formsBarcelonians