Definify.com

Webster 1913 Edition

Noun.

[L.: cf. F.

interventeur

One who intervenes; a mediator; especially

(Eccles. Hist.)

, a person designated by a church to reconcile parties, and unite them in the choice of officers.

Coleman.

interventor ‎(plural interventors)

One who intervenes; a mediator, especially one designated by a church to reconcile parties and unite them in the choice of officers.
- Lyman Coleman
  An effort was made, particularly in the Latin church, to correct the disorders of popular elections without taking away the rights of the people. This they did by the agency of an interventor, who was sent among the people to endeavour to unite their votes upon a given person […]

interventor m ‎(plural interventores, feminine interventora)