n.a residential area outside of a city and beyond suburbia
英汉双解大词典
exurbia/ɛksˈɜːbɪə/
1.
N（名词）
the region outside the suburbs of a city, consisting of residential areas (exurbs) that are occupied predominantly by rich commuters (exurbanites) 城市远郊 [美国英语] → compare stockbroker belt