Definition of Federal Rules of Evidence
Rules which govern the admissibility of evidence at trials in the Federal District Courts and before U.S. Magistrates. Many states have adopted Evidence Rules patterned on these federal rules. See 28 U.S.C.A. §§ 2072-2074.
That's the definition of Federal Rules of Evidence in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.