ALTO Meaning of ALTO in English alto BrE AmE ˈælt əʊ ˈɒlt-, ˈɔːlt-, ˈɑːlt- AmE \ ˈælt oʊ▷ alto|s z — Preference poll, British English: ˈælt- 71%, ˈɒlt- 14%, ˈɔːlt- 8%, ˈɑːlt- 7%. Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012