The part of a person's mind that tells them what is right and wrong, and makes them want to do what is right.
Having a strong superego is usually seen as a good thing because it means the person wants to do the right thing.
Examples:
His superego tells him not to steal.
She always listens to her superego.
My superego tells me to help my friend.
His superego is like a little voice in his head.
Her superego is so strong, she always does the right thing.
My superego is my guide to being good.