letter rulingglossary / LETTER RULING letter ruling. Tax. A written statement issued by the IRS to an inquiring taxpayer, explaining the tax implications of a particular transaction. — Also termed private letter ruling. [Cases: Internal Revenue 3049.] 词条贡献者 资深译员玉晶,毕业于国内顶尖的高级翻译学院,擅长翻译各类与环境、安全与健康相关的法律文件。