From BiblePortal Wikipedia

Webster's Dictionary [1]

(1): ( a.) Of or pertaining to province; constituting a province; as, a provincial government; a provincial dialect.

(2): ( a.) Exhibiting the ways or manners of a province; characteristic of the inhabitants of a province; not cosmopolitan; countrified; not polished; rude; hence, narrow; illiberal.

(3): ( a.) Of or pertaining to Provence; Provencal.

(4): ( a.) Of or pertaining to an ecclesiastical province, or to the jurisdiction of an archbishop; not ecumenical; as, a provincial synod.

(5): ( n.) A monastic superior, who, under the general of his order, has the direction of all the religious houses of the same fraternity in a given district, called a province of the order.

(6): ( n.) A person belonging to a province; one who is provincial.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]

The local superior of the monasteries (abbot, guardian, prior, etc.) stands under the supervision of the district superiors, or definitors; these are subordinated to the superiors of the province, or provincials, who are themselves under the direction of the general of the order, the head of the whole community.