Meaning of “signal box” in the English Dictionary

british dictionary

"signal box" in British English

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signal boxnoun [ C ]

uk /ˈsɪɡ.nəl ˌbɒks/ us /ˈsɪɡ.nəl ˌbɑːks/ UK US signal tower

a building from which railway signals are operated

(Definition of “signal box” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)