1. (

• alto

) a singer whose voice lies in the alto clef ;

2. (

• contralto ,
• alto

) the lowest female singing voice ;

3. (

• countertenor ,
• alto ,

) the highest adult male singing voice ;

4. (

• alto ,

) (of a musical instrument) the second highest instrument in a family of musical instruments ;

5. (

• alto

) the pitch range of the lowest female voice ;

1. (

• alto ,
• contralto

) of or being the lowest female voice ;

2. (

• countertenor ,
• alto ,

) of or being the highest male voice; having a range above that of tenor ;

3. (

• alto ,

) (of a musical instrument) second highest member of a group; "alto clarinet or recorder" ;