| Pope | The bishop of Rome, vicar of Christ on earth, successor of St. Peter, visible head of the whole Catholic Church. |
| Cardinal | An honorary title given to priests or bishops because of their important positions in the Church; Cardinals elect the new Pope. |
| Bishop | Rules over the people and priests of his diocese; can give Confirmation and Holy Orders. |
| Monsignor | A priest gets this honorary title from the Pope because of his important position in the Church. |
| Pastor | Rules over a parish; is subject to the bishop of the diocese. |
| Priest | Diocesan priests work in a diocese; religious priests belong to a religious order - like the Franciscans, Dominicans, etc... |
| Monk | Monks live in a monastery, follow a strict rule under a superior - like the Benedictines and the Trappists; some are priests, others are brothers. |
| Brother | A man dedicated to teaching, hospital work or contemplation; takes vows of poverty, chastity and obedience, but does not receive the Sacrament of Holy Orders. |
| Sister | A woman dedicated to teaching, hospital or social work, or contemplation; takes vows of poverty, chastity and obedience and belongs to a religious order or community. Cloistered sisters are usually called nuns; loosely speaking, all sisters are often called nuns. |