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.
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
Two days earlier they had slammed the door on UConn’s undefeated season in the semifinal.
From The Wall Street Journal • Apr. 5, 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
Throughout their undefeated Big Ten season, the Bruins’ freshmen have established themselves as a cornerstone of the team.
From Los Angeles Times • Mar. 21, 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.
