The term 'secret file' can be summarized as a DOSSIER, which is a collection of documents or records related to a particular subject or purpose. A secret file is a type of DOSSIER that contains confidential information and is usually kept in a secure location. It is often used to store sensitive information such as financial records, legal documents, and other private information. The term 'DOSSIER' comes from the French word for 'FOLDER' and is used to refer to a collection of documents or records.