DICT.TW Dictionary Taiwan

 Sol-fa v. i. [imp. & p. p. Sol-faed p. pr. & vb. n. Sol-faing.]  To sing the notes of the gamut, ascending or descending; as, do or ut, re, mi, fa, sol, la, si, do, or the same in reverse order.
    Yet can I neither solfe ne sing.   --Piers Plowman.