foreign service instituteglossary / FOREIGN SERVICE INSTITUTE Foreign Service Institute. A unit in the U.S. Department of State responsible for training officers and employees of the Foreign Service as well as personnel in other agencies. — Abbr. FSI. 词条贡献者 法律翻译郭敏,毕业于欧洲顶尖的高级翻译学院,擅长翻译涉及互动娱乐领域的法律文件。