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English definition of “siren”

siren

noun [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.

siren noun [C] (WOMAN)

(in ancient Greek literature) one of the creatures who were half woman and half bird, whose beautiful singing encouraged sailors to sail into dangerous waters where they died a woman who is considered to be very attractive, but also dangerous
(Definition of siren from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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