Pompous (adjective)

Having or showing an excessively high opinion of oneself; self-important.

Origin:

Early 17th century: from latin pompa "pomp" + -ous.

Examples:

1. He gave a pompous speech at the meeting.
2. She had a pompous attitude and acted superior to others.
3. His pompous manner made him seem arrogant and aloof.
4. The pompous official refused to listen to the complaints of the citizens.
5. The pompous professor's lectures were often more about himself than the subject matter.