IbanPronunciation: /ˈiːban/Definition of Iban noun (plural same) 1a member of an indigenous people of Kalimantan and Sarawak. Also called Sea Dayak. 2 [mass noun] the Austronesian language of the Iban, spoken by around 380,000 people. adjective relating to the Iban or their language. Origin:the name in Iban