siren

1. One of a group of nymphs who lured mariners to their death on the rocks.
2. One who sings sweetly and charms.
3. A dangerously seductive woman.
4. A member of an order of mammals of Sirenia (first attested in French in Dominique Bouhours, Les entretiens d'Ariste et d'Eugène, 1671).
5. A member of a genus of aquatic salamanders of the family Sirenidae (originally introduced by Linnaeus, 1766, for a genus of his reptiles), commonly used for all species subsumed under the family of Sirenidae.
6. Any of various nymphalid butterflies of the genus Hestina.
7. A device, either mechanical or electronic, that makes a piercingly loud sound as an alarm or signal, or the sound from such a device (first recorded 1879).
8. A musical instrument, one of the few aerophones in the percussion section of the symphony orchestra (patented as Acme Siren in 1895).
9. An instrument for demonstrating the laws of beats and combination tones.
10. An astrophysical event that can be used for calculating cosmic distances.

verb

To make a noise with, or as if with, a siren.

adjective

Relating to or like a siren.