noun

definition

Anything that announces something

definition

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

definition

A buzzer in a signal box that sounds when a train activates a treadle positioned on the track, and thus provides a warning or announcement of a nearby train.

Examples of annunciator in a Sentence

This particular device is manufactured with a flat-topped LED to provide excellent wide angle viewing for switchtop and annunciator illumination.

This particular device is manufactured with a flat-topped led to provide excellent wide angle viewing for switchtop and annunciator illumination.

The spring-jack used was a form of switch with two contact springs which pressed against each other, one being connected to the subscriber's line wire and the other to the annunciator, which was also earthed.

When a subscriber called (by turning the handle of his magneto- 'generator), the shutter of the annunciator associated with his line dropped.

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