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English definition of “alto”

alto

noun [C] uk   /ˈæl.təʊ/ us    /-toʊ/ (plural altos)
(a woman with) a low adult female singing voice or (a boy with) the lowest boys' singing voice or (a man with) the highest adult male singing voice: She began by singing soprano, then changed to alto. Voice ranges

alto

adjective uk   /ˈæl.təʊ/ us    /-toʊ/
refers to a musical instrument that is of a size and range between soprano and tenor: an alto saxophone/fluteMusical instruments in general
(Definition of alto from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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