In my diocese, when a priest retires, it is usually from “active ministry”. For example, let’s say say a priest was a pastor of a church. When he retires, he is no longer *obligated *to carry out the administrative duties that go along with that title. He may still help out at that parish or he may choose to reside and help out at another parish. He may spend more of his time on ministries that he enjoyed or felt called to, but could not dedicate himself to because of his role as pastor, such as hospital/hospice ministry, prison ministry, spiritual direction, etc.