Simple Definition of triathlon
sports : a long-distance race that has three parts (such as swimming, bicycling, and running)
Full Definition of triathlon
: an athletic contest that is a long-distance race consisting of three phases (as swimming, bicycling, and running)
Origin of triathlon
tri- + -athlon (as in decathlon)
First Known Use: 1973
Learn More about triathlon
Britannica.com: Encyclopedia article about "triathlon"
Seen and Heard
What made you want to look up triathlon? Please tell us where you read or heard it (including the quote, if possible).