Self-importance is an exaggerated sense of your own value or significance. Someone who shows self-importance acts as though they're more important than everyone else around them. They might interrupt others constantly, ignore advice because they think they already know best, or expect special treatment just for being themselves.

You can spot self-importance when someone talks endlessly about their own achievements but rarely asks about anyone else's day. A student with self-importance might dismiss a teammate's ideas without listening, assuming their own plan must be superior. Self-important people often believe the rules that apply to others shouldn't apply to them.

The word carries a critical tone. When someone describes a person as self-important, they're pointing out irritating behavior, not giving a compliment. It suggests someone has lost perspective about their actual place in the world.

This is different from healthy confidence or justified pride in real accomplishments. A scientist who makes a breakthrough can feel proud without being self-important. The difference lies in whether you still respect others, listen to different viewpoints, and recognize that everyone has value. Self-importance means you've stopped seeing that basic truth.