noun

1. the syllables do (formerly ut), re, mi, fa, sol (or so), la, ti (or si), do (or ut), used to represent the tones of a scale, regardless of its key
2. the use of these syllables, as in vocal exercises; solfeggio

Etymology: It solfa < sol + fa: see gamut

transitive verb, intransitive verb sol-faed -·faed′ (-fäd′), sol-faing -·fa′ing