Bahasa Indonesia ba·ha·sain·donesia uncommon noun 1. the dialect of Malay used as the national language of the Republic of Indonesia or of Malaysia SynonymsIndonesianBahasa IndonesiaBahasa Related words Broader terms Malay Narrower terms JavaneseSundaneseBalinese WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.