exeat
A license or permit for absence from a university or a religious house (such as a monastery).
A permission which a bishop grants to a priest to go out of his diocese.
Leave of absence from a public school or college.
dated
[I]t was impossible to imagine her doing anything except eating ice-cream and smoking, like a child on an exeat from school.
A stage direction to leave the stage.
obsolete
Where it comes from
Borrowed from Latin exeat, third-person singular subjunctive of exeō (“depart”) used as an impersonal imperative, literally “let him go forth”.
Adapted from the Wiktionary entry exeat (CC BY-SA 4.0).