noun
decathlon
dih-KATH-lun/dɪˈkæθlən/
An athletic contest consisting of ten track-and-field events.
The decathlon scorecard covers ten different track-and-field events.

Etymology
“Ten” and “contest” name a single composite athletic competition with ten challenges, rather than ten unrelated contests. The deeper origin of Greek athlon is uncertain.
In context
the decathlon competition spans two full days with five different events each day
More examples
- A strong pole vault improves his decathlon score.
- Training for the decathlon requires both speed and endurance.
- The decathlon ends with the fifteen-hundred-meter race.
Forms
decathlon · decathlons
Similar words
- triathlon
- A race with three disciplines rather than ten track-and-field events.
- heptathlon
- A heptathlon combines seven events; a decathlon combines ten.