The Collaborative International Dictionary of English v.0.48:
Provisor \Pro*vi"sor\, n. [L., fr. providere: cf. F. proviseur.
1. One who provides; a purveyor. [Obs.] "The chief provisor
of our horse." --Ford.
2. (R. C. Ch.)
(a) The purveyor, steward, or treasurer of a religious
(b) One who is regularly inducted into a benefice. See
Provision, 5. --P. Plowman.
3. (Eng. Hist.) One who procures or receives a papal
provision. See Provision, 6.