Definition of siren noun from the Oxford Advanced Learner's Dictionary

     

    siren

     noun
    noun
    BrE BrE//ˈsaɪrən//
     
    ; NAmE NAmE//ˈsaɪrən//
     
    Attractiveness, Female attractiveness
     
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  1. 1a device that makes a long loud sound as a signal or warning an air-raid siren A police car raced past with its siren wailing.
  2. 2 (in ancient Greek stories) any of a group of sea creatures that were part woman and part bird, or part woman and part fish, whose beautiful singing made sailors sail towards them into rocks or dangerous waters
  3. 3a woman who is very attractive or beautiful but also dangerous See related entries: Attractiveness, Female attractiveness
  4. 4siren voices/song/call (literary) the temptation to do something that seems very attractive but that will have bad results The government must resist the siren voices calling for tax cuts.
  5. Word Origin Middle English (denoting an imaginary type of snake): from Old French sirene, from late Latin Sirena, feminine of Latin Siren, from Greek Seirēn.Extra examples The cars had stopped at the sound of the approaching siren. The police siren died away into the hot night. The ships all sounded their sirens. the blaring sirens of ambulances and police cars Air-raid sirens sounded to warn everyone in the city that an attack was coming.
See the Oxford Advanced American Dictionary entry: siren