CEFR B1
siren
noun
Meaning
A device that produces a loud, high-pitched warning sound, typically mounted on emergency vehicles or used in public alarm systems.
Examples
- The ambulance siren blared as it navigated through the heavy afternoon traffic.
- A loud air-raid siren sounded across the city to signal the start of the safety drill.
Synonyms: alarm, warning, hooter, klaxon