/keuhn tral"toh/ , n. , pl. contraltos , adj. Music.
n.
1. the lowest female voice or voice part, intermediate between soprano and tenor.
2. the alto, or highest male voice or voice part.
3. a singer with a contralto voice.
adj.
4. pertaining to the contralto voice or its compass.
[ 1720-30; contr ( a ) CONTRA- 2 + alto ALTO ]