| NOUN | artifact | signaling device | a device used to send signals |
|---|
| Meaning | A device used to send signals. | |
|---|---|---|
| Narrower | bell | A hollow device made of metal that makes a ringing sound when struck |
| buzzer | A signaling device that makes a buzzing sound | |
| foghorn | A warning device consisting of a horn that generates a loud low tone | |
| whistle | acoustic device that forces air or steam against an edge or into a cavity and so produces a loud shrill sound | |
| Broader | device | An instrumentality invented for a particular purpose |
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