DictionaryaltoLower musical range
noun / adjective

alto

AL-toh/ˈæltəʊ/

A musical register between soprano and tenor.

The alto sings the harmony below the soprano melody.

An older female singer rehearses the low female part from a foreground score whose lower-register melody contrasts clearly with a higher melody, using only notes within the treble staff to avoid the failed ledger-line construction.
Etymology

The meaning “high” originally described a man's voice above the tenor, which carried the melody. The name later extended to the lower range of women's voices and to singers in that range.

In context

Tamara Nozik2:15
alto singers in contemporary or musical theater music. In contemporary music, I would probably think of the singers Lana Del Rey, Lorde and Amy Winehouse. They all have really low tones in their singing
Are YOU an ALTO Singer? The Low Female Choir Voice Part Explained In Simple Terms

More examples

  • The choir needs two more altos.
  • He switches from tenor saxophone to alto for the solo.
  • The arrangement includes a prominent alto part.

Forms

alto · altos

Similar words

contralto
More specifically names the lowest customary female vocal range.
mezzo-soprano
Generally lies higher than the alto range.