triathlon

noun

tri·​ath·​lon trī-ˈath-lən How to pronounce triathlon (audio)
-ˌlän,
 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
That category includes tennis, golf, swimming, track and field, wrestling, gymnastics, skiing, fencing, women’s bowling, indoor and outdoor cross country, women’s triathlon, women’s equestrian, rifle and skiing. Michael McCann, Sportico.com, 30 July 2025 The triathlon — beyond the stamina needed to complete it — is less intense, and can be completed on rowing machines, stationary bikes, and in the resort pool. Manal Albarakati, semafor.com, 21 July 2025 The river hosted several open-water events, including the swimming leg of the triathlon. Miriam Waldvogel, The Hill, 7 July 2025 The events on June 1 include the Sprint Distance triathlon (500-meter swim, 11.6-mile bike ride, and a 5-kilometer run) or the Olympic Distance triathlon (1,500-meter swim, a 23.2-mile bike ride, 10-kilometer run). Deborah Laverty, Chicago Tribune, 26 May 2025 See All Example Sentences for triathlon

Word History

Etymology

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

Browse Nearby Words

Cite this Entry

“Triathlon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/triathlon. Accessed 9 Aug. 2025.

Kids Definition

triathlon

noun
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)

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