The senior monk of a monastery is known as an abbot. A nun of the same rank is called an abbess, and presides over a convent.
The word abbot means "father" and is derived from the Latin word "abbas," as well as the Old English words "abbod" and "abbad." The title is used in many religions, including Christianity.
A monk is man who has dedicated his life to serving his religion by taking holy orders. This process often involves taking vows of poverty, obedience and chastity. Monks live in a monastery, in which their daily life is structured according to rules set forth by church leaders, including the abbot. The rules emphasize honoring God and the church.