Nun
A nun is a celibate Catholic woman who is called to serve God. Nuns usually work inside a convent and are part of an order. A nun will often wear a habit, a covering for the head. It is black and white and signifies that one serves God.
Each order has a mission, ordained by God. Some nuns work as teachers in Catholic schools or as nurses in hospitals. All nuns must take a vow of poverty, and any money they earn goes towards supporting their convent or order.
A woman who is a widow or is not a virgin may become a nun, but a divorcee may not, unless approved by the Vatican. In Catholicism, women are not allowed to become priests, but becoming a nun is considered a fulfilling and rewarding choice. Women interested in becoming nuns are encouraged to try living in a convent for a spell so they might decide whether they would really like to serve God in that capacity.
A beginner nun is called a novice and is required to take vows of chastity and poverty. Leaving the sisterhood after taking vows is frowned upon, much like divorce.