A priory is a monastery of men or women under religious vows that is headed by a prior or prioress. Priories may be houses of mendicant friars or nuns (such as the Dominicans, Augustinians, Franciscans, and Carmelites, for instance), or monasteries of monks or nuns (as with the Benedictines). Houses of canons regular and canonesses regular also use this term, the alternative being "canonry".
In pre-Reformation England, if an abbey church was raised to cathedral status, the abbey became a Cathedral Priory. The bishop, in effect, took the place of the abbot, and the monastery itself was headed by a prior.