Sôr'dine, n.

(Synop., § 130), n. [It. sordina, sordino, Fr. sourdine, from It. sordo, Fr. sourd, Lat. surdus, deaf, dull-sounding.] (Mus.) A small instrument or damper in the mouth of a trumpet, or on the bridge of a violin, violoncello, or similar instrument, to make the sound fainter.