Cities of refuge means in the bible: Six cities are located on either side of Jordan, that is Kedesh and Shechem and Hebron on the west side and Bezer and Ramoth on the east side. This allows a victim of homicide to seek refuge from the blood avenger. These cities can be used according to Num’s regulations. 35:6-34; Deut. 19:1-13; Josh. 20.
(in Bible Dictionary)