Lewis & Short

cătaclīsta vestis = κατάκλειστον ίμάτιον [to be kept shut up; cf.: vestis seposita, Tib. 2, 5, 8], a splendid garment for festal occasions, a state dress, App. M. 11, p. 261, 21, p. 261 Bip.; Tert. Pall. 3.
Hence, cătaclīstĭcus, a, um, adj., of a state dress: fila, Ven. vit. S. Mart. 4 med.