柯林斯詞典dust jacket (also dust-jacket) (dust jackets) 1. N-COUNT A dust jacket is a loose paper cover which is put on a book to protect it. It often contains information about the book and its author. (常印有書籍和作者信息的)書籍保護套 返回 dust jacket劍橋詞典a paper cover for a book , usually with the title of the book and the name of the author (= writer ) printed on it （書籍的）護封，書套 返回 dust jacket