plural altos
music
: a singing voice that is lower than the voice of a soprano and higher than the voice of a tenor
also
: a singer having such a voice
She sang in her school choir as an alto.
always used before a noun
: having a range that is lower than a soprano and higher than a tenor
an alto voice
He plays the alto sax/saxophone.
Cite this Entry
“Alto.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/alto. Accessed 20 Jun. 2026.
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