1. excessively or arrogantly proud; having too much pride
Usage: often used to describe someone who is proud to an unreasonable or unpleasant degree

Examples

• He was overproud of his small achievement and wouldn't stop bragging about it.
• The overproud athlete refused to acknowledge his teammates' contributions to the victory.
• She had an overproud attitude that made it difficult for others to work with her.
• His overproud nature prevented him from admitting his mistakes.
• The overproud family looked down on their neighbors.
• Despite his overproud demeanor, he was actually quite insecure.