Definitions:

1. A designated room in or near a church sanctuary used for the storage and preparation of liturgical objects, including chalices, communion elements, vestments, and altar linens. NOUN
   • The chalices and candles were carefully arranged in the sacristy.
2. Refers to a room in a church where sacred vessels, vestments, and other items used in worship are kept, and where clergy and altar servers prepare before services. NOUN
   • The priest entered the sacristy to robe before Mass.

Synonyms:

• aspe
• chancel
• sacrarium
• sanctuary
• vestiary
• vestry