1. plural of overconfidence; excessive or unjustified confidence in one's abilities, judgment, or success
Usage: countable noun; typically used in plural form to refer to multiple instances or manifestations of excessive confidence

Examples

• The team's overconfidences led them to underestimate their opponents and lose the championship.
• His repeated overconfidences in his investment strategies eventually resulted in significant financial losses.
• The company's overconfidences about market dominance blinded them to emerging competitors.
• Several overconfidences in the project timeline caused delays and budget overruns.
• Athletes must guard against overconfidences that can undermine their performance in crucial moments.
• The overconfidences displayed by the startup founders prevented them from seeking necessary advice.