- ADJ-GRADED (disapproval)If you say that someone is self-important, you disapprove of them because they behave as if they are more important than they really are.
He was self-important, vain and ignorant.
...self-important officials.Syn:pompous, arrogantDerived words:self-importance N-UNCOUNT
Many visitors complained of his bad manners and self-importance.
English dictionary. 2008.