Definition of signal box in English English dictionary
A building, typically adjacent to or spanning a railway line, from where signals, points and (sometimes) level crossings are controlled
a building from which signals are sent to control the movements of railway trains
A signal box is a small building near a railway, which contains the switches used to control the signals. a small building near a railway from which the signals and tracks are controlled
any of the large metal boxes containing traffic signal controls, found at roadsides and intersections, and often made available by the local council for artistic work