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A dossier is a set of papers — or, now, a set of files — that gathers detailed information about one person or one subject, often information meant to stay private. Police, journalists, and offices keep dossiers. The word feels serious, even a little secret: “a dossier on someone” sounds like a file that could be used to judge or expose them, not a friendly . English borrowed it whole from French, so it still feels formal and a bit international. In everyday talk people often just say file or record; news and spy stories are fonder of dossier.
卷宗、檔案（一整套針對某人／某事的資料，常帶機密意味；不是電腦裡的一個檔案）
組成Taken whole from French dossier, not respelled. In French it was the bundle of papers with a label on the back (dos = “back”).
同家族的字
- dorsalboth go back to “back”: Latin dorsum / French dos
原始詞典資料1 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
dossiernoun/ˈdɔs.jeɪ/
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A collection of papers and/or other sources, containing detailed information about a particular person or subject, together with a synopsis of their content.
- For Lothian and Borders Police, the early-morning raid had come at the end one of biggest investigations carried out by the force, which had originally presented a dossier of evidence on the murder of Jodi Jones to the Edinburgh procurator-fiscal, William Gallagher, on 25 November last year.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。