tri·​ath·​lon trī-ˈath-lən How to pronounce triathlon (audio)
 nonstandard  -ˈa-thə-
: an athletic contest that is a long-distance race consisting of three phases (such as swimming, bicycling, and running)

Examples of triathlon in a Sentence

Recent Examples on the Web Unfortunately, the biggest triathlon events tend to take place in hotter climates like Kona, Hawaii, the traditional site of the Ironman World Championships. Bill Gifford, Men's Health, 12 June 2023 Those include its iconic triathlons—consisting of a 2.4-mile swim, 112-mile bike ride, and a 140.6-mile run—as well as triathlons of half that distance, Ironman 70.3 races, and half-marathons. Phil Wahba, Fortune, 29 Jan. 2024 Braun says another key piece of his recovery puzzle was having a supportive community in the endurance-sports world in L.A., along with friends who supported his triathlon journey. Pamela Chelin, Los Angeles Times, 20 Dec. 2023 Sarah has participated alongside him in a few triathlons, making for some healthy competition. Kaitlin Stevens, Peoplemag, 13 Jan. 2024 For an outdoor athlete pushing their heart and lungs to the max in performance races like these triathlons, wildfire smoke is not good at all. Lori Nickel, Journal Sentinel, 5 Aug. 2023 As of December, 29 YMCAs in Connecticut and three other states have agreed to host a triathlon this year, says Rebecca. Kc Baker, Peoplemag, 14 Dec. 2023 Speaking of Olympians, Gwen Jorgenson, originally from Waukesha, won the gold medal at the 2016 Rio Olympics in the triathlon, the first American to win the event. Drew Dawson, Journal Sentinel, 31 July 2023 He’s also done several other triathlons, including an Ironman. Pamela Chelin, Los Angeles Times, 20 Dec. 2023 See More

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'triathlon.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


tri- + -athlon (as in decathlon)

First Known Use

1924, in the meaning defined above

Time Traveler
The first known use of triathlon was in 1924

Dictionary Entries Near triathlon

Cite this Entry

“Triathlon.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2024.

Kids Definition


tri·​ath·​lon ˌtrī-ˈath-ˌlän How to pronounce triathlon (audio)
: an athletic contest that is a long-distance race consisting of three phases (as swimming, bicycling, and running)

More from Merriam-Webster on triathlon

Last Updated: - Updated example sentences
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