Annunciator meaning

ə-nŭnsē-ātər
One that announces, especially an electrical signaling device used in hotels or offices to indicate the sources of calls on a switchboard.
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A person or thing that announces.
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An electric indicator, as a light or buzzer, used in hotels, offices, etc. to show the source of calls.
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Anything that announces something.
  • An officer in the church of Constantinople, whose business it was to inform the people of the festivals to be celebrated.
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A signalling device that shows which of several electrical circuits is active, especially such a device in a telephone switchboard.
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A buzzer in a UK signal box, that sounds when a train activates a treadle positioned on the track. Provides a warning or announcement of a nearby train.
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Origin of annunciator