1965년에 대부분이 광역 런던에 흡수되었지만 일부는 행정적으로 분리되어 남아있는 잉글랜드 남동부의 역사적인 주(county).
A historic county in southeastern England, which was largely absorbed into Greater London in 1965, though parts remain administratively separate.
예문:
"Before the reorganization of 1965, Middlesex was known for its proximity to the growing metropolis of London."
"Many suburban areas that were once considered part of Middlesex are now firmly within the boundaries of Greater London."
"The county cricket club still retains the name Middlesex, preserving the historical identity."