Definition of "sordo" []

• In music, damped with a mute: as, clarinetto sordo, a damped or muffled clarinet; tromba sorda, a damped or muffled trumpet.

The Century Dictionary (Public Domain)

• "Tiring of this, he took a plectrum and laid the side of his right hand across the bridge so that he could mute the strings and play 'sordo'."
• "This town is in three parts - alto, sordo and bassa."
• "Then came a poor mad boy, a sordo-muto, who had been overlooked."