the·sis/`θisɪs; ˈθiːsɪs/ n [C], plural theses /-siz; -siːz/ 1 a long piece of writing that you do for a university degree 〔为取得大学学位所写的〕论文,学位论文: She's writing her thesis on women criminals. 她正在写关于女性罪犯的学位论文。 2formal an idea or statement that tries to explain why something happens 【正式】 〔设法解释某事的〕论点,论述