noun. One that announces, especially an electrical signaling device used in hotels or offices to indicate the sources of calls on a switchboard.

noun. One who or that which announces; an announcer.

noun. One who announces. Specifically: An officer in the church of Constantinople, whose business it was to inform the people of the festivals to be celebrated.

noun. An indicator (as in a hotel) which designates the room where attendance is wanted.

noun. Anything that announces something

noun. A signalling device that shows which of several electrical circuits is active, especially such a device in a telephone switchboard

noun. 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.

noun. an indicator that announces which electrical circuit has been active (as on a telephone switchboard)

"Just the moment before the head of the locomotive rammed that seemingly immovable barrier at the end of the siding there flashed into the air from Tom's annunciator the code word agreed upon announcing a wreck, and the number of the sector on which the electric locomotive was then running."

indicator  

Angelus  annunciation  buzzer  comparedto  forn