conceited
adj. C1 Advanced US //kənˈsitəd// UK //kənsˈiːtɪd// con·ceit·ed
adj. having too much pride in yourself and thinking you are better than everyone else. You use this to describe someone who is very full of themselves.
adj. characterised by excessive pride in one's own abilities or appearance. Often used to describe a person who overestimates their own importance or talent.
He was so conceited that he refused to listen to any advice.
The young athlete was conceited after winning the gold medal, thinking he was the best player in the world.
The protagonist's conceited nature eventually leads to his downfall, as his refusal to acknowledge his own flaws alienates those who could have helped him succeed.
From conceit + -ed.
See conceit (verb).