- to overcome in a contest, election, battle, etc.; prevail over; vanquish: They defeated the enemy. She defeated her brother at tennis.
- to frustrate; thwart.
- to eliminate or deprive of something expected: The early returns defeated his hopes of election.
- Law. to annul.
- the act of overcoming in a contest: an overwhelming defeat of all opposition.
- an instance of defeat; setback: He considered his defeat a personal affront.
- an overthrow or overturning; vanquishment: the defeat of a government.
- a bringing to naught; frustration: the defeat of all his hopes and dreams.
- the act or event of being bested; losing: Defeat is not something she abides easily.
- Archaic. undoing; destruction; ruin.
Origin of defeat
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for undefeated
Undefeated Harvard, which had three games left, including its finale with Yale, did not follow suit.When West Point Football Turned Fatal
October 30, 2014
Now they are the undefeated winners of Group D, conquerors of Greece, and the latest quarterfinalists.What Hillary Clinton Can Learn From Portugal, Costa Rica, and England in the World Cup
July 1, 2014
The New England Patriots came into Super Bowl XLII, an undefeated 18-0 team that was poised to be the greatest in NFL history.Seahawks-Broncos and 7 Other Thrilling Super Bowl Matchups
February 6, 2014
In Super Bowl XLII, perhaps the most astounding Super Bowl ever played, the Giants managed to beat the undefeated Patriots 17-14.New York City Is the Storied Football Capital of the USA
January 26, 2014
In 2004, Smarty Jones—undefeated going into the race—had the benefit of a nice story.Scratching I’ll Have Another Lifts a Cloud of Suspicion off the Triple Crown
June 9, 2012
But there will be no peace for Europe while Germany remains an undefeated autocracy.The Devil's Paw
E. Phillips Oppenheim
And then there was a defiance about his nostrils that showed he was undefeated.The Crossing
But nevertheless you are a masculine being, strong and undefeated.Seductio Ad Absurdum
Jack snorted, but Sarella, undefeated, proceeded to put the case of his being ill.Mariquita
Meanwhile the poet in 1833 went on quietly and undefeated with his work.Alfred Tennyson
- not having been defeatedthe undefeated champion
- to overcome in a contest or competition; win a victory over
- to thwart or frustratethis accident has defeated all his hopes of winning
- law to render null and void; annul
- the act of defeating or state of being defeated
- an instance of defeat
- overthrow or destruction
- law an annulment
Word Origin and History for undefeated
1590s, from defeat (v.).
late 14c., from Anglo-French defeter, from Old French desfait, past participle of desfaire "to undo," from Vulgar Latin *diffacere "undo, destroy," from Latin dis- "un-, not" (see dis-) + facere "to do, perform" (see factitious). Original sense was of "bring ruination, cause destruction." Military sense of "conquer" is c.1600. Related: Defeated; defeating.