soundboard soundage • sounder · · · Info · Definitions · Synonyms · Characters · · soundboard · · Text Latin · · Script 10 · · Length Definitions · · · (noun) (music) resonator consisting of a thin board whose vibrations reinforce the sound of the instrument. Synonyms: sounding board. · · Noun Definition 1 Synonyms · · · sounding board · · Synonym 1 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 d latin small letter d U+0064 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