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signal box

noun, British
1.
a railway signal tower.
Origin
1820-1830
1820-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for signal-box

signal box

noun
1.
a building containing manually operated signal levers for all the railway lines in its section
2.
a control point for a large area of a railway system, operated electrically and semiautomatically
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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