THIRD-CLASS Meaning of THIRD-CLASS in English third-class BrE AmE ˌθɜːd ˈklɑːs ◂ ⇨ˌθɜːɡ-, § -ˈklæs AmE ˌθɝːd ˈklæs ◂ Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012