conceited
Definitions
Excessively proud of oneself; vain.
Having an exaggerated sense of one's own importance or abilities.
Examples
He was so conceited that he spent hours admiring his own reflection in the mirror.
It is difficult to work with someone who is so conceited that they refuse to listen to anyone else's ideas.
Synonyms
arrogant narcissistic vain haughty self-important egotistical pompous
Antonyms
humble modest unassuming meek self-effacing down-to-earth unpretentious