Austronesian /ˌɔːs.tɹoʊˈniː.ʒən/adjective 2noun 1forms 3 adjective2 •Pertaining to the Austronesian language family. •Of or pertaining to Austronesia. noun1 •A speaker of an Austronesian language, especially a member of the ancient maritime culture that spread Austronesian languages across the Pacific from Taiwan. formsAustronesians · more Austronesian · most Austronesian