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.
One of the weirdest parts of getting into long-distance running or triathlons is learning how much endurance athletes love and hate—and rely on—little packets of goo-like gels. Jennifer Heimlich, SELF, 26 June 2025 In an area roughly the size of Manhattan, Boa Vista Village contains hundreds of large homes and apartments, acres and acres of lush landscaping, golf courses, an equestrian center, a triathlon training center, two polo fields, a spa and a wave pool for surfing, among other amenities. David Moin, Footwear News, 6 June 2025 During their last year of completing work for doctoral degrees in physiology, twin sisters Michal Mor and Merav Mor started to compete in Ironman triathlon races. Afshan Musani, CNBC, 5 June 2025 His first-place win on Sunday marked his third title in three years, triathlon officials said. Deborah Laverty, Chicago Tribune, 2 June 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 6 Jul. 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)

More from Merriam-Webster on triathlon

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