Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “triathlon”


noun [C]     /traɪˈæθ.lɒn/ US  /-lɑːn/
a competition in which the people competing must swim , ride a bicycle , and run particular distances without stopping between events Athletics triathlete     noun [C] someone who competes in a triathlonCompetitors and participants in sports and gamesAthletics
(Definition of triathlon noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of triathlon

Definitions of “triathlon” in other dictionaries

Translations of “triathlon”

Word of the Day

tie the knot

to get married

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More