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signal board

noun
1.
a board for displaying electrically transmitted signals and indicating their source.
Compare annunciator.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Historical Examples
  • A small platform, two windows, a door, and the signal board perched high on a pole completed the outfit.

    Danger Signals John A. Hill and Jasper Ewing Brady

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