He is the head of a monastery or convent. A female abbot is an abbess, she is the head and leader of a convent or monastery for nuns.
In England, Abbot means abbey father. In Hebrew usage and Israel, Abbot means father.
Friars
monks
An Abbot is the leader of a monastery in the Roman Catholic Church; usually in the Benedictine order but also in the Cisterian order, and Carthusian.