
1) DC Comics supervillain 2) Fictional gangster 3) Military rank 4) Railroad man 5) Railroader 6) Railway man 7) Railway signalling 8) Railwayman 9) Signaler 10) Signaller 11) Trainman 12) Transport occupation 13) Wigwagger
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https://www.crosswordclues.com/clue/signalman

A Signalman is a person who historically made signals using flags and light. In modern times the role of Signalmen has evolved and now usually uses electronic communication equipment. Signalmen usually work in rail transport networks, armed forces, or construction (to direct heavy equipment such as cranes). Many armed forces now use the rank of Si...
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http://en.wikipedia.org/wiki/Signalman
[rail] A signalman or signaller is an employee of a railway transport network who operates the points and signals from a signal box in order to control the movement of trains. == History == The first signalmen, originally called Railway Policemen (leading to the nickname of `Bobby`), were employed in the early 19th century and used flags to...
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http://en.wikipedia.org/wiki/Signalman_(rail)
[rank] Signalman was a U.S. Navy rating for sailors that specialized in visual communication. See Signaller for more about the roles of Signalmen. ==United States usage== ===U.S. Navy=== A signal lamp (also called an Aldis lamp) is a visual signaling device for optical communication In the U.S. Navy, `signalman` (usually nicknamed `Flags` o...
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http://en.wikipedia.org/wiki/Signalman_(rank)

• (n.) A man whose business is to manage or display signals; especially, one employed in setting the signals by which railroad trains are run or warned.
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http://thinkexist.com/dictionary/meaning/signalman/

the person responsible for the operation of the signalling control means in accordance with the requirements of railway traffic
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http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=821-05-15
Sig'nal·man noun ;
plural -men A man whose business is to manage or display signals; especially, one employed in setting the signals by which railroad trains are run or warned.
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http://www.encyclo.co.uk/webster/S/100

A person in charge of the signalling at a station or junction, often in a Signal-box.
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http://www.translationdirectory.com/glossaries/glossary256.php

[
n] - a railroad employee in charge of signals and point in a railroad yard
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http://www.webdictionary.co.uk/definition.php?query=signalman
noun a railroad employee in charge of signals and point in a railroad yard
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https://www.encyclo.co.uk/local/20974
No exact match found.