sousaphone soury • sousaphonist · · · Info · Definitions · Synonyms · Characters · · sousaphone · · Text Latin · · Script 10 · · Length Definitions · · · (noun) the lowest brass wind instrument. Synonyms: bass horn, tuba. · · Noun Definition 1 Synonyms · · · bass horn · · Synonym 1 tuba · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 u latin small letter u U+0075