undisputed world champion

British

noun

boxing a boxer who holds the World Boxing Association, the World Boxing Council, the World Boxing Organization, and the International Boxing Federation world championship titles simultaneously

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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undisputed world champion

Katie Taylor ended her illustrious career as a three-time undisputed world champion as Croke Park gave one of Ireland's greatest sporting figures the grandest of farewells on a night of celebration, spectacle and music.

From BBC ● Sep. 5, 2026

Hennessy, the number one ranked challenger with the WBC, would become the youngest undisputed world champion in four-belt history if she defeats Thorslund.

From BBC ● Aug. 20, 2026

By the age of 25, Maca plans to be an undisputed world champion cruising around in a carbon black Bugatti.

From BBC ● Jun. 14, 2025

That Charlo, a 33-year-old undisputed world champion, knows he still needs to prove himself says it all.

From Los Angeles Times ● Sep. 28, 2023

Buchanan was Scotland's first undisputed world champion and arguably the country's greatest boxer.

From BBC ● Apr. 1, 2023

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023