Yukaghir Syllabification: (Yu·ka·ghir)Pronunciation: /ˌyo͞okəˈgir/Definition of Yukaghir noun (plural same or Yukaghirs) 1a member of a people of Arctic Siberia. 2the language of the Yukaghir, of uncertain affinity but possibly Uralic. adjective relating to the Yukaghir or their language. Origin:Yakut