Pompous/ˈpɑːmpəs/ Definition 1 of 2Pro Tip 1/3Negative Tone Using 'pompous' can express disapproval and insult someone's behavior or speech. His pompous remarks made everyone roll their eyes. Pro Tip 2/3Unearned Importance 'Pompous' implies the importance a person expresses is not deserved. She came across as pompous, talking as though she knew everything. Pro Tip 3/3Over-Formality 'Pompous' suggests using a level of formality that's excessive for the situation. His pompous tone didn't fit the casual gathering.