I. mez ‧ zo /ˈmetsəʊ $ -oʊ/ BrE AmE adverb
[ Date: 1700-1800 ; Language: Italian ; Origin: 'middle, half' , from Latin medius ; ↑ medium ]
mezzo forte/piano etc technical not too loudly, softly etc – used in instructions for performing music
II. ˌmezzo-soˈprano BrE AmE ( also mezzo ) noun [countable]
a female singing voice that is lower than a ↑ soprano but higher than an ↑ alto , or a woman with a voice like this