What is Ministerial Duty?

Legal Definition
A ministerial duty, the performance of which may in proper cases be required of a public officer by judicial proceedings, is one in respect to which nothing is left to discretion; it is a simple, definite duty arising under circumstances admitted or proved to exist and imposed by law. State v. McGrath, 92 Mo. 355, 5 S. W. 29; Mississippi v. Johnson, 4 Wall. 498, 18 In Ed. 437; People v. Jerome, 36 Misc. Rep. 256, 73 N. Y. Supp. 306; Duvall v. Swann, 94 Md. 608, 6l Atl. 617; Gledhill v. Governor, 25 N. J. Law, 351. A ministerial duty arises when an individual has such a legal interest in its performance that neglect of performance becomes a wrong to such individual. Morton v. Comptroller General, 4 S. C. 473.
-- Black's Law Dictionary
Legal Definition
the term that is given to the duty that is carried out by a person in a public position.