1. • noun - a sea nymph (part woman and part bird) supposed to lure sailors to destruction on the rocks where the nymphs lived
   • noun - a woman who is considered to be dangerously seductive
   • noun - a warning signal that is a loud wailing sound
   • noun - an acoustic device producing a loud often wailing sound as a signal or warning
   • noun - eellike aquatic North American salamander with small forelimbs and no hind limbs
2. • A device in which compressed air or steam is driven against a rotating perforated disk to create a loud, often wailing sound as a signal or warning.
   • An electronic device producing a similar sound as a signal or warning: a police car siren.
   • Any of several salamanders of the family Sirenidae, such as the mud eel, having an eellike body, permanent external gills, small forelegs, and no hind limbs.
3. • n - a device that produces a penetrating warning sound

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