THOROUGHGOING Meaning of THOROUGHGOING in English thoroughgoing BrE AmE ˌθʌr ə ˈɡəʊ ɪŋ ◂ AmE \ ˌθɝː oʊ ˈɡoʊ ɪŋ ◂ -ə- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012