Belarus Be·la·rus (bĕl′ə-ro͞os′, bĕl′ə-ro͞os′, byĕl′-) Formerly Be·lo·rus·sia (bĕl′ō-rŭsh′ə, byĕl′-) or Bye·lo·rus·sia (byĕl′ō-) or White Russia. A country of eastern Europe east of Poland and west of Russia. Originally settled by Slavs, the region was subject to Lithuania and Poland before passing to Russia in …

