Definition of overconfidence in English:

overconfidence

noun

mass noun
  • The quality of being too confident; excessive confidence.

    ‘you have to guard against overconfidence’
    • ‘But it can easily get carried too far, as people develop overconfidence in the financial sector.’
    • ‘Hubris and overconfidence are deadly no matter who you are.’
    • ‘Once they had developed such overconfidence, they became wholly dedicated to their cause.’
    • ‘"Our studies found overconfidence helped people attain social status," he said.’
    • ‘Be warned, then: don't let overconfidence lure you into undervaluing the guarantee of a good job.’
    • ‘He denied that his decision betrayed overconfidence.’
    • ‘Training must be obediently maintained until lessons can be digested without displaying overconfidence.’
    • ‘Be alert for complacency, overconfidence, or a lack of communication.’
    • ‘We did not want to foster overconfidence.’
    • ‘Today's liberals have a naive overconfidence in seemingly easy, scientific answers to social problems.’

Pronunciation

overconfidence

/ˌəʊvəˈkɒnfɪd(ə)ns/