Definitions for old bailey
the central criminal court in London
a street in the City between Holborn circus and St Paul's Cathedral
the Central Criminal Court in this street
Origin: Originally "The Bailey", a street running outside the western wall of medieval London; from the word "bailey," a Middle English term for the outermost wall or court of a fortification. The courthouse built nearby in the 16th century, alongside old Newgate Prison, took its name from the street.
The Nuttall Encyclopedia
a Court or Sessions house adjoining Newgate (q. v.), in London, for the trial of offences committed within a certain radius round the city, and practically presided over by the Recorder and the Common Serjeant of London, though theoretically by the Lord Mayor, Lord Chancellor, and others.