vestment

Short definition from Wiktionary

Noun

1. 1
   A robe, gown, or other article of clothing worn as an indication of office.
2. 2
   Any of the special articles of clothing worn by members of the clergy etc., especially a garment worn at the celebration of the Eucharist.
3. 3
   Clothing.
4. 4
   An article of clothing, especially an outer garment.