He was a tough, burly, thick-headed gentleman, with a loud voice, a pompous manner, a tolerable command of sentences with no meaning in them, and, in short, every requisite for a very good member indeed.
There are no more uses of "pompous" in the book.
Show samples from other sources
She gave another pompous speech.
"Well done, Ron, excellent," said Percy Weasley pompously as "Zabini, Blaise," was made a Slytherin.
J.K. Rowling -- Harry Potter and the Sorcerer’s Stone