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.
He is undefeated in three heavyweight fights and stopped Ebenezer Tetteh last December in his most recent outing.
From BBC • Apr. 21, 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
As in the baffling series of self-inflicted mistakes the legendary UConn women’s basketball coach inflicted on himself and his program during and after South Carolina’s 62-48 upset of the previously undefeated Huskies.
From The Wall Street Journal • Apr. 5, 2026
And then, of course, they’d likely meet No. 1, undefeated UConn in the final, where the Huskies would be trying to win a second consecutive title.
From Los Angeles Times • Mar. 24, 2026
Everything about him was old except his eyes and they were the same color as the sea and were cheerful and undefeated.
From "The Old Man and The Sea" by Ernest Hemingway
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.
