Definitions

1. adjective

extremely high or lofty in pitch or quality

“The opera singer’s voice reached altissimo notes, captivating the audience.”

2. noun

the highest or uppermost part of a melody or a scale

“The altissimo of the song was a beautiful, soaring melody.”

3. adverb

to a very high or extreme degree

“The conductor instructed the orchestra to play altaltissimo, pushing the music to new heights.”