[ˈæltəʊ, ˈɑltəʊ]

Definitions

1. noun

the highest adult male singing voice

“The opera singer had a beautiful alto voice.”

2. adjective

high in pitch

“The alto note on the flute was clear and distinct.”

3. adverb

to a great or extreme degree

“The alto cold weather made the roads icy.”

4. adjective

relating to or characteristic of something that is high in pitch

“The alto keys on the piano were used in the melody.”