Definition of Extra Allowance
In New York practice, a sum in addition to costs, which may, in the discretion of the court, be allowed to the successful party in cases of unusual difficulty. Hascall v. King, 54 App.Div. 441, 66 N.Y.S. 1112.
That's the definition of Extra Allowance in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.