(1), Any person in orders, whether major or minor.
(2) Isidore of Seville speaks of a clerk occupying his dace position in the hiearchy as an "ecclesiastical clerk," in distinction from an irregular clerk.
⇒Bible concordance for ECCLESIASTICISM.
(3) Those who were so connected with a Church as to be unable to leave; its service were called in a special sense "ecclesiastical men." They were not slaves.