SundanesePronunciation: /ˌsʌndəˈniːz/Definition of Sundanese noun (plural same) 1a member of a mainly Muslim people of western Java. 2 [mass noun] the Indonesian language of the Sundanese, with around 25 million speakers. adjective relating to the Sundanese or their language. Origin:from Sundanese Sunda, the western part of Java, + -eseSundanese in other Oxford dictionaries Definition of Sundanese in the US English dictionary