A nun is a woman who takes monastic vows. In the Catholic tradition, these are typically vows of stability (that is, to remain a member of a single monastic community), obedience (to an abbess or prioress), and "conversion of life" (which includes the ideas of poverty and celibate chastity), in the various branches of the Benedictine tradition (Benedictines, Cistercian and Trappists), though in other groups like the Poor Clares (a Franciscan order) and cloistered Dominicans the three-fold vows of chastity, poverty and obedience are used.
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