/ ˌθʌrəˈgəʊɪŋ; NAmE ˌθɜːroʊˈgoʊɪŋ/ adjective [ only before noun ]
1.
very thorough; looking at every detail :
a thoroughgoing revision of the text
2.
complete :
a thoroughgoing commitment to change
THOROUGHGOING
Meaning of THOROUGHGOING in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005