ADULT Meaning of ADULT in English adult adjective, noun BrE AmE ˈæd ʌlt ə ˈdʌlt AmE \ ə ˈdʌlt ˈæd ʌlt ▷ adult|s s — Preference polls (noun), American English: •ˈ• 88%, ˈ•• 12%; British English: ˈ•• 84%, •ˈ• 16%. Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012