0 having or showing too much confidence:
I think my expectations were high and I was maybe a little bit overconfident.
Swift progress made us overconfident.
Over-confident brashness may not impress an interview panel.
He seemed arrogant and overconfident of his squad's firepower and abilities.
He is somewhat overconfident, which sometimes gets him into trouble.
He is reasonably experienced, but can still occasionally be a little naive and overconfident.
However, like most of the other new recruits, he was overconfident about his skills.
Zell is slightly impulsive and overconfident in his own skill; however, he is loyal to his friends.