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Synonyms

overconfident

American  
[oh-ver-kon-fi-duhnt] / ˈoʊ vərˈkɒn fɪ dənt /

adjective

  1. too confident.

    Synonyms:
    heedless, reckless, arrogant, bold, cocksure, certain, sure
overconfident British  
/ ˌəʊvəˈkɒnfɪdənt /

adjective

  1. excessively confident

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • overconfidence noun
  • overconfidently adverb

Etymology

Origin of overconfident

First recorded in 1610–20; over- + confident

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It comes off loud, blustery, and overconfident, as if to signal a blasé disengagement with the incredible stakes of the moment.

From Slate • Mar. 6, 2026

Kapralyk praised those who sign up to fight but worried that many, like Horbenko, were overconfident.

From The Wall Street Journal • Jan. 30, 2026

“They were overconfident because they underestimated the competition.”

From Los Angeles Times • Dec. 6, 2025

Maybe they're rude, overconfident or have a habit of helping themselves to snacks without asking.

From BBC • Nov. 16, 2025

I didn’t go out on the strip overconfident, because I knew Cecilia would be a tough opponent and I had just proved in my last bout that the underdog can win.

From "Proud" by Ibtihaj Muhammad

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.