[trahy-ath-luh n]
  1. an athletic contest comprising three consecutive events, usually swimming, bicycling, and distance running.
  2. a women's track-and-field competition comprising the 100-meter dash, high jump, and shot put.
  3. British. a competition comprising fly-casting, horseback-riding, and trapshooting events.

Origin of triathlon

First recorded in 1970–75; tri- + (dec)athlon Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for triathlon

Contemporary Examples of triathlon

British Dictionary definitions for triathlon


  1. an athletic contest in which each athlete competes in three different events: swimming, cycling, and running
Derived Formstriathlete, noun

Word Origin for triathlon

C20: from tri- + Greek athlon contest
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

Word Origin and History for triathlon

1973, from tri- "three" + Greek athlon "contest;" formed on model of decathlon, etc.

Online Etymology Dictionary, © 2010 Douglas Harper