Definition from Wiktionary, the free dictionary
vestry (plural vestries)
- A room in a church where the clergy put on their vestments and where these are stored; also used for meetings and classes; a sacristy
- The choirboys change into their cassocks in the vestry.
- A committee of parishioners elected to administer the temporal affairs of a parish
- The vestry meets the first Tuesday every month.
room in a church
committee of parishioners