undefeated
Britishadjective
Explanation
Has your volleyball team won every single game this season? Then it's undefeated — it hasn't been beaten yet! You'll almost always find this adjective describing sports teams or players who haven't suffered a loss, like the undefeated tennis player who's won all of her matches or the basketball team that's been undefeated for four games. Undefeated adds the prefix un-, or "not," to defeated, "beaten," which we can trace back to the Vulgar Latin diffacere, "destroy."
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.
According to AI, “LeBron James is undefeated, winning all 24 playoff series when his teams have taken a 2-0 lead.”
From Los Angeles Times • Apr. 25, 2026
South Carolina beat Clark’s Hawkeyes in the 2024 national championship to cap off an undefeated season.
From Los Angeles Times • Apr. 14, 2026
Tyson Fury says he took his undefeated record "for granted" as the British heavyweight appeared lean and sharp before Saturday's bout with Arslanbek Makhmudov at Tottenham Hotspur Stadium.
From BBC • Apr. 10, 2026
Kotaskova, who was previously undefeated, wore the damage of Cameron's relentless work by the end of the fifth round, with blood coming from her nose and markings under her eyes.
From BBC • Apr. 5, 2026
She had very dark lips and a buoyant, undefeated manner.
From "Americanah" by Chimamanda Ngozi Adichie
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.
