PunanPronunciation: /puːˈnɑːn/Definition of Punan noun (plural same or Punans) 1a member of any of various groups of Dayak peoples inhabiting parts of Borneo. 2 [mass noun] any of the related languages of the Punan, now with fewer than 4,000 speakers. adjective relating to the Punan or their languages. Origin:the name in Dayak