undefeated

British  

/ ˌʌndɪˈfiːtɪd /

adjective

1. not having been defeated

   the undefeated champion

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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

Kabayel is also undefeated in 27 professional bouts, winning 19 of those by stoppage - including victories over Makhmudov and Zhilei Zhang.

From BBC • Apr. 12, 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

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

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

If we think we can beat Independence Junior High — the defending champions, the number one seed, the only other undefeated team — then we will.

From "The Crossover" by Kwame Alexander

Related Words

• reigning
• unbeaten