n.
Pronunciation: ' al-( ˌ )t ō
Function: noun
Inflected Form: plural altos
Etymology: Italian, literally, high, from Latin altus
Date: circa 1724
1 a : COUNTERTENOR b : CONTRALTO
2 : the second highest voice part in a 4-part chorus
3 : a member of a family of instruments having a range lower than that of the treble or soprano especially : an alto saxophone