(
music) a system of naming the notes of a scale by syllables instead of letters derived from the 11th-century hexachord system of Guido d'Arezzo, which assigns the names
ut (or
do),
re, mi, fa, sol, la, si (or
ti) to the degrees of the major scale of C (
fixed system) or (excluding the syllables
ut and
si) to the major scale in any key (
movable system)
See also tonic sol-fa