drop letterglossary / DROP LETTER drop letter. A letter addressed to someone in the delivery area of the post office where the letter was posted. [Cases: Postal Service 23. C.J.S. Postal Service and Offenses Against Postal Laws § 22.] 词条贡献者 双语律师Roger,毕业于一所培养最顶级翻译人才的语言学院,擅长翻译各类与商业秘密咨询与诉讼相关的法律文件。