Definition of Federal Rules of Appellate Procedure
These rules govern procedure in appeals to United States courts of appeals from the United States district courts and the Tax Court of the United States; in proceedings in the courts of appeals for review or enforcement of orders of administrative agencies, boards, commissions and officers of the United States; and in applications for writs or other relief which a court of appeals or a judge thereof is competent to give. Certain states have adopted rules patterned on such federal rules to govern practice in their appellate courts.
That's the definition of Federal Rules of Appellate Procedure in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.