1. a device that gives a visual or audible signal to indicate the status or location of something
Usage: technical
2. a person who announces or proclaims something
Usage: formal

Examples

• The fire annunciator panel showed which floor had triggered the alarm.
• Each elevator had an annunciator that displayed the current floor number.
• The security annunciator beeped when someone entered the restricted area.
• The building’s annunciator system helped maintenance staff locate problems quickly.
• As the royal annunciator, he proclaimed the new decree to the gathered crowd.
• The annunciator lights on the control panel indicated which machines were running.