Exeat
exeat.
The absolute and perpetual release of a cleric from the diocese in which he has heretofore been incardinated. Excardination is not effective unless the cleric receives absolute and perpetual letters affiliating him with another diocese , vicariate, or prefecture Apostolic. This release must, for validity, be signed by the Ordinary of the place. A cleric is likewise excardinated if he receives the written permission of his Ordinary to accept a residential benefice in another diocese , or written permission to leave the diocese perpetually, having received such a residential benefice in another diocese . A religious who makes perpetual profession is likewise excardinated from his diocese .
Fuente: New Catholic Dictionary
Exeat
a Latin term, signifying either the permission given by a bishop to a clergyman of his diocese that he may for a time go out of his diocese, or the same permission given by an abbot to one of the “religious” of his monastery, or by the authorities of a college (in England) to a student.