Definitions for "Square Mile"
a traditional unit of area. One square mile is equal to 640 acres, 3 097 600 square yards, 258.9988 hectares, or 2.589 988 square kilometers.
325-acre (131.5 ha) area.
an area of 640 acres
City of London, ‘The City'.
Londonâ€(tm)s financial centre, as defined by London's old medieval walls.