A wordless vocal exercise or concert piece sung to one or more vowels. One of first concert pieces was Ravel's Vocalise en forme d'habanera. There are also Vocalise, for v. and pf. by Rachmaninov, Op.34, No.14, comp. 1912, rev. 1915, and 3 Vocalises for sop. and cl. by Vaughan Williams (1958).