DictionarysirenWarning signal
noun

siren

SIGH-run/ˈsaɪrən/

A device that makes a loud warning sound, or the sound itself.

The outdoor siren produces a loud sound to warn people.

A close, three-quarter view of a recognizable outdoor mechanical warning siren: a cylindrical slotted rotor housing beneath a broad weather cap, mounted on a short pole with an electric motor and conduit.
Etymology

A Seirēn was a mythical singer whose song lured sailors to destruction. The name later shifted from a creature known for its voice to a mechanical device producing a warning sound.

In context

Storm Chaser Jordan Hall16:27
We never got any warning to evacuate here. All we got was the little the The the tur- the tornado siren going off.
Hellfire in the Heartland - The Texas Panhandle Disaster

More examples

  • The ambulance approaches with its siren blaring.
  • We hear a siren and pull over to let the fire truck pass.
  • The town tests its tornado sirens every month.

Forms

siren · sirens

Similar words

alarm
A broader warning signal, which may use sound or light.
horn
Usually produces a steady blast rather than a rising-and-falling wail.