Definition of "annunciator" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "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."
• "Instead of watching the live feed of Prime Minister's Questions on a Wednesday on our "annunciator" i.e."
• ""By this time the 'annunciator' had grown to formidable dimensions."