In phonetics, intonation refers to the variations of voice pitch. In some languages, factors such as rhythm and stress are also considered.
Intonation has a major role in interpreting emotions, and in some cases might alter the grammatic structure of a phrase (e.g. the word "progress" might be a verb or noun depending or intonation).
intonation is the use of changing (rising and falling) vocal pitch to convey grammatical information. An example of intonation is the way your voice raises in pitch at the end of a question. An example oif intonation is the Gregorian chant.
