1 self-important, affectedly grand or solemn.
2 (of language) pretentious; unduly grand in style.
3 archaic magnificent; splendid.
Derivatives:
pomposity n. (pl. -ies). pompously adv. pompousness n.
Etymology: ME f. OF pompeux f. LL pomposus (as POMP)
Useful english dictionary. 2012.