THUNDER Meaning of THUNDER in English thunder BrE AmE ˈθʌnd ə AmE \ - ə r▷ thunder|ed d▷ thundering/ly ˈθʌnd‿ ə r ɪŋ /li▷ thunder|s z▶ ˌ Thunder ˈ Bay BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012