Meanings of most grandiloquent in English

The Chancellor wrote him in his most grandiloquent style.

Hackers at their most grandiloquent perceive themselves as the elite pioneers of a new electronic world.

I assumed an exaggerated imitation of Dromanus' most grandiloquent manner and in his orotund unctuous delivery I declaimed:

His Highness is most grandiloquent.

As the Scout Master made this elaborate announcement in his most grandiloquent manner, the boys responded laughingly, clapping their hands appreciatively, but uttering no word.