(1):

(v. t.) To sing to solmization syllables.

(2):

(v. i.) 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.

(3):

(n.) The gamut, or musical scale. See Tonic sol-fa, under Tonic, n.