Vo″cal‐ize (?), v. t. [imp. & p. p.Vocalized (?); p. pr. & vb. n.Vocalizing (?).] [Cf. F. vocaliser.] 1. To form into voice; to make vocal or sonant; to give intonation or resonance to.
It is one thing to give an impulse to breath alone, another thing to vocalize that breath. Holder.
2. To practice singing on the vowel sounds.