thoroughly Pronunciation: /ˈθɜːrəʊli; ˈθʌrəli/Translate thoroughly | into French | into German | into Italian Spanish translation of thoroughlyadv 1 [wash/clean] a fondo, a conciencia; [research] rigurosamente; [examine] minuciosamente 2 (completely) [understand] perfectamente we thoroughly enjoyed ourselves = nos divertimos muchísimothoroughly in other Oxford dictionaries Definition of thoroughly in the British & World English dictionary Definition of thoroughly in the US English dictionary