DayakPronunciation: /ˈdʌɪak/ (also Dyak)Definition of Dayak noun (plural same or Dayaks) 1a member of a group of indigenous peoples inhabiting parts of Borneo, including the Iban (or Sea Dayak) of the north, the Land Dayak of the south-west, and the Punan. 2 [mass noun] the group of Austronesian languages spoken by the Dayak. adjective relating to the Dayak or their languages. Origin:Malay, literally 'up-country'Dayak in other Oxford dictionaries Definition of Dayak in the US English dictionary