Thoroughgoing/ˌθɜːrəʊˈɡəʊɪŋ/ Definition 1 of 2Pro Tip 1/3Total Commitment Use 'thoroughgoing' to show commitment to completing tasks with high standards. As a thoroughgoing detective, she checked every single clue. Pro Tip 2/3Attention to Detail Describes someone who's very detailed and leaves nothing unfinished. His thoroughgoing analysis caught all the discrepancies. Pro Tip 3/3No Half Measures 'Thoroughgoing' stress that all parts of something are dealt with. The renovation was a thoroughgoing process, revamping every room.