Guamanian /ɡwɑːˈmeɪni.ən/noun 2adjective 1forms 1 noun2 •An indigenous (Chamorro) inhabitant of Guam, or someone of Guamanian descent. •A resident of Guam (of any ethnic background). adjective1 •Of, from, or pertaining to Guam, the Guamanian people or the Guamanian (Chamorro) language. formsGuamanians