an electrically operated device for producing a penetrating warning sound
an ambulance siren
an apparatus producing musical tones by the rapid interruption of a current of air, steam, etc by a perforated rotating disc
(often Siren) in Greek mythology, any of a group of women or winged creatures that lured sailors to destruction by their singing
a dangerously alluring or seductive woman; a temptress
any of a genus of eel-shaped amphibians with small forelimbs but no hind limbs and with external gills as well as lungs: genus Siren
[Middle English via French from Latin Sirena, fem of Siren, from Greek Seirēn]