seniority systemglossary / SENIORITY SYSTEM seniority system. Employment law. Any arrangement that recognizes length of service in making decisions about job layoffs and promotions or other advancements. 词条贡献者 法律翻译William,毕业于法国一流的高级翻译学院,擅长翻译有关农业和食品领域的法律文件。