frock 
(frŏk)
(frŏk)n.
1. A dress.
2. A long loose outer garment, as that worn by artists and craftspeople; a smock.
3. A woolen garment formerly worn by sailors; a jersey.
4. A robe worn by monks, friars, and other clerics; a habit.
tr.v. frocked, frock·ing, frocks
1. To clothe in a frock.
2. To invest with clerical office.
[Middle English frok, a monk's habit, from Old French froc, from Medieval Latin froccus, of Germanic origin.]