si·ren 
/ˈsaɪrən/ noun
plural si·rens /ˈsaɪrən/ noun [count] 1 : a piece of equipment that produces a loud, high-pitched warning sound
▪ an ambulance siren ▪ the wailing of air-raid sirens ▪ We heard police sirens. [=sirens on police cars] 2 : a woman who is very attractive but also dangerous : temptress
▪ a Hollywood siren 3 Siren : one of a group of female creatures in Greek mythology whose singing attracted sailors and caused them to sail into dangerous water or toward rocks
▪ an ambulance siren ▪ the wailing of air-raid sirens ▪ We heard police sirens. [=sirens on police cars]
▪ a Hollywood siren
