English Reference

Word

undefeated

Phoneticsun·de·feat·ed

US/ˌəndɪˈfitɪd/

UK/ˌʌndɪfˈiːtɪd/

Definition

adj. having never lost a game, fight, or competition. You use this to describe a team or person with a perfect record.

adj. having suffered no defeats in a series of contests or competitions. Often used to describe a sports team's season or a professional fighter's career record.

Examples

“The local football team remains undefeated this season.”

“After twelve professional matches, the boxer is still undefeated and holds the championship belt.”

“Maintaining an undefeated record throughout a long tournament requires not only physical stamina but also the mental resilience to perform under the pressure of high expectations.”

Examples

simple

“The local football team remains undefeated this season.”

contextual

“After twelve professional matches, the boxer is still undefeated and holds the championship belt.”

complex

“Maintaining an undefeated record throughout a long tournament requires not only physical stamina but also the mental resilience to perform under the pressure of high expectations.”

Usage

Typically used as a predicative adjective following a linking verb like 'remain' or 'stay'.

Real-World Examples

“The 26-year-old has been in excellent form this season, undefeated in the event, but there was little to suggest that Karsten Warholm's 2021 mark of 45.94 seconds was in danger.”
BBC News · 27 Aug 2026

Etymology

From un- + defeated.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry

Level
B2 · Upper Intermediate
Frequency
Frequent
Updated

Scan code

englishreference.com/q/undefeated

English Reference