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 译者Lorna,毕业于国内一流的法学院,擅长翻译各种与商业秘密相关的法律文件。