Definition of Formality
The conditions, in regard to method, order, arrangement, use of technical expressions, performance of specific acts, etc., which are required by the law in the making of contracts or conveyances, or in the taking of legal proceedings, to insure their validity and regularity. Term generally refers to "procedure” in contrast to "substance”.
That's the definition of Formality in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.