sourdine sourdeline • soured · · · Info · Definitions · Synonyms · Characters · · sourdine · · Text Latin · · Script 8 · · Length Definitions · · · (noun) a mute for a violin. Synonyms: sordino. · · Noun Definition 1 (noun) an organ stop resulting in a soft muted sound. · · Noun Definition 2 Synonyms · · · sordino · · Synonym 1 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 u latin small letter u U+0075