What is the meaning of Vocalization?

The act of vocalizing or something vocalized; a vocal utterance

Any specific mode of utterance; pronunciation

The use of speech to express an idea

The production of communication sounds with the syrinx or larynx (in tetrapods) or with the swim bladder (in fish)

The production of musical sounds using the voice, especially as an exercise

The vowel diacritics in certain scripts, like Hebrew and Arabic, which are not normally written, but which are used in dictionaries, children's books, religious texts and textbooks for learners.

The addition of these diacritics and the respective phonemes to a word; the spoken form the word thereby receives.

The change in pronunciation of historically or variably consonant (typically sonorant) sounds as vowels. For example, the syllabic /l/ in words like people or the coda one in words like cold or coal are variably realized as a high back vowel or glide—[ʊ], [u], [ɤ] or [o]—in many dialects of English in the US, UK, and the Southern Hemisphere. For example, in African American Vernacular English, one common pronunciation of the words "people", "cold", and "coal" is [pʰipʊ], [kʰoɤd], or [kʰoɤ] respectively.

Source: wiktionary.org