Definition of "siren"

noun:
- (Greek mythology) One of a group of nymphs who lured mariners to their death on the rocks.
  
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- A device, either mechanical or electronic, that makes a piercingly loud sound as an alarm or signal, or the sound from such a device.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- A dangerously seductive woman.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- A common name for salamanders of Siren and Sirenidae.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
- A common name for mammals of Sirenia.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License
adjective:
- Relating to or like a siren.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License