tending to be overly confident in one's importance, worth, or abilities, often showing this by exaggerating one's qualities in a harsh and overpowering manner;
e.g. He was a very arrogant and opinionated man, so very few people liked to talk to him.
(adjective)
showing an attitude that one things they are better than (superior to) others, often resulting from an exaggerated opinion of one's importance, worth, or abilities;
e.g. We could tell from the arrogant tone of her question that she thought we were wasting her time.