MicronesianPronunciation: /mʌɪkrə(ʊ)ˈniːzj(ə)n, -ʒ(ə)n/Definition of Micronesian adjective relating to Micronesia, its people, or their languages. noun 1a native of Micronesia. 2 [mass noun] the group of Austronesian languages spoken in Micronesia. Micronesian in other Oxford dictionaries Definition of Micronesian in the US English dictionary