D defs.my
Entry 2 senses Webster, 1913

Vocalize

/(vō"kal*īz)/ · Vo·cal·ize · IPA /ˈvoʊ.kə.laɪz/
01 v. t. To form into voice; to make vocal or sonant; to give intonation or resonance to.
imp. & p. p. Vocalized; p. pr. & vb. n. Vocalizing
  1. 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. 2.
    To practice singing on the vowel sounds.