overspill
noun [ S or U ] UK uk/ˈəʊ.və.spɪl/ us/ˈoʊ.vɚ.spɪl/
（迁出城市并在其附近居住的）分流人口
people who move out of a crowded city and into other towns or villages near the city
the overspill from London/the London overspill 迁至伦敦城外居住的人口
an overspill housing estate. 分流人口居住区