overconfident

adjective over·con·fi·dent \ ˌō-vər-ˈkän-fə-dənt , -ˌdent \

Definition of overconfident

: excessively or unjustifiably confident : having too much confidence (as in one's abilities or judgment)
  • an overconfident driver
  • wasn't overconfident about their chances of winning
  • … he often starts cold, missing a few shots, allowing his opponent to get on a roll, to get overconfident.
  • —Brett Forrest

overconfidently

adverb
    • overconfidently predicted the team would win

First Known Use of overconfident

circa 1617



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