Lewis & Short

pompātĭcus, a, um, adj. [pompa], showy, pompous, splendid (post-class.): femina, Tert. Cult. Fem. 9: genus vehiculi, for state occasions, Isid. 20, 12, 3.
Hence, adv.: pompātĭcē, with display, pompously, Vulg. Amos, 6, 1; Jul. Vict. Rhet. 10, p. 233: favor, App. M. 10, p. 253, 11.