Meaning of “siren” in the English Dictionary

"siren" in British English

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sirennoun [ C ]

uk /ˈsaɪə.rən/ us /ˈsaɪr.ən/

siren noun [ C ] (DEVICE)

C2 a device for making a loud warning noise:

police sirens
When the air raid siren went off people ran to their shelters.

More examples

  • The siren signalled the approach of an ambulance .
  • In an emergency, the siren will be sounded.

(Definition of “siren” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"siren" in American English

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sirennoun [ C ]

us /ˈsɑɪ·rən/

siren noun [ C ] (DEVICE)

a device that makes a loud warning noise:

The terrible wail of sirens signaled a disaster.

siren noun [ C ] (WOMAN)

(in ancient Greek literature) a creature who was half woman and half bird, whose singing brought ships into dangerous waters

(Definition of “siren” from the Cambridge Academic Content Dictionary © Cambridge University Press)