[vest.ment] n [ME vestement, fr. MF, fr. L vestimentum, fr. vestire to clothe] (14c) 1 a: an outer garment; esp: a robe of ceremony or office b pl: clothing, garb
2: a covering resembling a garment
3: one of the articles of the ceremonial attire and insignia worn by ecclesiastical officiants and assistants as indicative of their rank and appropriate to the rite being celebrated -- vest.men.tal adj