[{"Bold_text": "noun", "List Items": ["the lowest female voice; contralto.", "the highest male voice; countertenor.", "a singer with such a voice.", "a musical part for such a voice.", "the second highest of the four parts of a mixed vocal chorus, or the voices or persons singing this part.", "the second highest instrument in a family of musical instruments, as the viola in the violin family or the althorn in the cornet family."]}, {"Bold_text": "adjective", "List Items": ["of, relating to, or having the tonal range of the alto.", "(of a musical instrument) second highest in a family of musical instruments:alto saxophone."]}, {"Bold_text": null, "List Items": ["variant of alti- :altostratus."]}]