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Definition of signal box noun from the Oxford Advanced Learner's Dictionary

signal box

noun
 
/ˈsɪɡnəl bɒks/
 
/ˈsɪɡnəl bɑːks/
(British English)
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  1. a building next to a railway from which rail signals are operatedTopics Transport by bus and trainc2
sufficiently
adverb
 
 
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