<p><strong>Noun</strong></p><ul><li>Classical Mythology: one of several sea nymphs, part woman and part bird, who lure mariners to destruction by their seductive singing.</li><li>a seductively beautiful or charming woman, especially one who beguiles men: a siren of the silver screen.</li><li>Synonyms: vamp, temptress, seductress.</li><li>an acoustical instrument for producing musical tones, consisting essentially of a disk pierced with holes arranged equidistantly in a circle, rotated over a jet or stream of compressed air, steam, or the like, so that the stream is alternately interrupted and allowed to pass.</li><li>an implement of this kind used as a whistle, fog signal, or warning device.</li><li>any of several aquatic, eellike salamanders of the family Sirenidae, having permanent external gills, small forelimbs, and no posterior limbs.</li></ul><p><strong>Adjective</strong></p><ul><li>of or like a siren.</li><li>seductive or tempting, especially dangerously or harmfully: the siren call of adventure.</li></ul><p><strong>Verb</strong></p><ul><li>(used without object) to go with the siren sounding, as a fire engine.</li><li>(used with object) to allure in the manner of a siren.</li></ul>