To officially remove a priest from their position as a punishment, because of what they did or what they believe. The Church takes away the right to serve as a priest — the person is no longer allowed to lead services or do a priest's work. It is a formal word, mostly seen in news reports about scandals in the Church, and it is almost always used in the passive: a priest is unfrocked, not 'the bishop unfrocked him', though that is possible too. The image inside it is clean and easy to remember: a frock here is the long robe a priest wears, so to unfrock someone is to strip the robe off them, take away the clothing that showed who they were. English has a small family of these 'take away the badge of office' words — you can also 'defrock' a priest, which means exactly the same thing and is actually the more common form in modern news. Both are correct; if you only remember one, remember 'defrock'. Outside the Church the word is rare, but writers sometimes borrow it as a joke for anyone stripped of their title. Note also that the everyday meaning of 'frock' is a woman's dress, an old-fashioned British word — that is the same word, just a different sense.

革除神職、褫奪聖職（把神父的職務正式免掉）。新聞裡更常看到同義的 defrock。