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English definition of “marathon”

marathon

noun [C]     /ˈmærəθən/
RACE B2 a race in which people run for about 26 miles /42 km: the London marathon a marathon runner Athletics
LONG EVENT a very long event : a dance marathonLong periods of time
(Definition of marathon noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “marathon” in other dictionaries

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