Function

Definition of Function

Derived from Latin "functus,” the past participle of the verb "fungor” which means to perform, execute, administer. The nature and proper action of anything; activity appropriate to any business or profession. Rosenblum v. Anglim, D.C.Cal., 43 F.Supp. 889, 892. Office; duty; fulfillment of a definite end or set of ends by the correct adjustment of means. The occupation of an office. By the performance of its duties, the officer is said to fill his function. The proper activities or duties of municipality. Bean v. City of Knoxville, 180 Tenn. 448, 175 S.W.2d 954, 955.

That's the definition of Function in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.