intransitive. To exhibit pomp or splendour; to conduct oneself pompously or ostentatiously; †to boast, brag (obsolete). Also transitive with it.

Haughtily, pompously; pretentiously, boastfully; (in somewhat weakened use) confidently. Now chiefly in to talk big.

transitive. With it. To act with excessive pomp or self-importance; to act too tyrannically or autocratically. Obsolete. rare.

To behave pompously or pretentiously, swagger; to play the ‘swell’. Also with it.

intransitive. To perform the functions of a pontiff or other bishop; spec. to preside over a solemn high mass.