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ball signal. In DICTIOUS you will not only get to know all the dictionary meanings for the word
ball signal, but we will also tell you about its etymology, its characteristics and you will know how to say
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English
Noun
ball signal (plural ball signals)
- (historical) A kind of mechanical signal used on early American railroads, consisting of wooden balls, painted various colors, that were hoisted up and down a pole using a rope and pulley.