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

an·nun′ci·a·to′ry (-ə-tōr′ē) adj.


1. (General Physics) a device that gives a visual indication as to which of a number of electric circuits has operated, such as an indicator in a hotel showing in which room a bell has been rung
2. (Railways) a device giving an audible signal indicating the position of a train
3. (Broadcasting) a less common word for announcer


(əˈnʌn siˌeɪ tər)

1. an announcer.
2. a signaling apparatus, esp. in some doorbell systems, that uses lights or pointers to indicate the source of the signal.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.annunciator - an indicator that announces which electrical circuit has been active (as on a telephone switchboard)
indicator - a device for showing the operating condition of some system
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References in periodicals archive ?
The VIVISUN[R] LED annunciator with ARINC converter responds directly to the ARINC 429 data bus and provides an ADS-B FAIL indication to the pilot eliminating the need for any additional hardware.
INTRODUCED in the 1950's Alarm Annunciators have become a common sight in many industrial applications around the world and they remain one of the clearest methods of informing plant operators that a process has gone beyond set limits.
The fourth generation digital annunciator is designed to succeed the DD-40NTS annunciator and offers a range of new features, the company said.
The annunciator on the air-line mask amplifies the wearer's voice and allows all orders to be heard clearly.
A metal level sensor with alarms as well as a PLC-based combustion fault annunciator also was incorporated in the design to assist in operation, troubleshooting and maintenance.
A versatile recorder that integrates the functions of a data logger, multipoint recorder, digital indicator and alarm annunciator has been introduced by Westronics, and is available through WE Instrumentation Ltd.
The sensors provide a 4-20 mA transmitter output, a switched output for control or annunciator functions and a local display of system pressure.
When the transmitter button is pressed, the receiver clearly displays the transmitter number, while the wall-mounted annunciator sounds an audible alarm.
Now, two communicating annunciator panels alert him when the UPSs kick in and go to battery.
Tenders invited for Criticality alarm system with field annunciator
The annunciator is perfectly positioned above the on/ off power button on the face of the control module.