Other forms: prioresses
The head of a group of nuns is a prioress. Geoffrey Chaucer immortalized this figure by including The Prioress's Tale as one of his 14th-century Canterbury Tales.
In the hierarchy of religious figures at a Carmelite or Dominican monastery, a group of nuns is lead by a prioress, whose superior is called an abbess. The male version of these ranks are prior and abbot, leaders who preside over a group of Catholic monks.