BOISTEROUS Meaning of BOISTEROUS in English boisterous BrE AmE ˈbɔɪst ə r əs ⇨ˈbɔɪs trəs ▷ boisterous|ly li▷ boisterous|ness nəs nɪs Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012