Definition of pentathlon noun from the Oxford Advanced American Dictionary

 

pentathlon

 noun
noun
NAmE//pɛnˈtæθlɑn//
 
, NAmE//pɛnˈtæθlən//
 
 
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a sporting event in which people compete in five different sports (running, riding, swimming, shooting, and fencing ) compare biathlon, decathlon, heptathlon, tetrathlon, triathlon
See the Oxford Advanced Learner's Dictionary entry: pentathlon