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Lynn,知名国际商学院金融专业,专注翻译各种与贷款人责任及其他银行业与金融机构诉讼有关的法律文件。