noun: A former inland county of England, partly absorbed into the erstwhile County of London in 1889; finally abolished in 1965 and absorbed mainly into Greater London, the south-west corner of the county becoming part of Surrey.
noun: The central of the three historical counties of Jamaica, bordered by the counties of Cornwall in the west and Surrey in the east; named for the English county.
noun: Ellipsis of Middlesex County. [A county of Ontario, Canada.]