də̇ˈkathlən, dēˈ-, -ˌlän noun
( -s )
Etymology: French décathlon, from déca- deca- + Greek athlon contest — more at athlete
: a 10-event athletic contest ; specifically : a composite contest that consists of the 100-meter, 400-meter, and 1500-meter runs, the 110-meter high hurdles, the javelin and discus throws, shot put, pole vault, high jump, and broad jump