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.
The undefeated 2019 season, with Heisman Trophy-winning quarterback Joe Burrow, was the peak of Orgeron’s stint with the Tigers.
From Los Angeles Times • May 21, 2026
For the first time since going undefeated in 2003-04, the club from North London was an English champion.
From The Wall Street Journal • May 20, 2026
That performance came at a perfect time before this semi-final, with their win against Atletico completing an undefeated run to the final - with Arsenal conceding just six goals along the way.
From BBC • May 5, 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
Three hours later, Akhi and I were exchanging high fives because I had gone undefeated in the pool round, winning all six bouts, directly advancing on to the second day of competition.
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.
