alto clef alto clarinet • alto flute · · · Info · Definitions · Synonyms · Characters · · alto clef · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) a clef that puts middle C on the third line of a staff. Synonyms: alto clef, viola clef. · · Noun Definition 1 Synonyms · · · viola clef · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 l latin small letter l U+006C o latin small letter o U+006F t latin small letter t U+0074