overconfidence
/ˌəʊvəˈkɒnfɪd(ə)ns
/noun [mass noun]
The quality of being too confident; excessive confidence: you have to guard against overconfidence...
- Be warned, then: don't let overconfidence lure you into undervaluing the guarantee of a good job.
- Today's liberals have a naive overconfidence in seemingly easy, scientific answers to social problems.
- Once they had developed such overconfidence, they became wholly dedicated to their cause.