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marathon

noun [C] (RACE)
 
 
/ˈmær.ə.θən/ US  /-θɑːn/

Definition

B2 a running race of slightly over 26 miles (42.195 kilometres): the London/New York marathon She did/ran her first marathon in just under three hours.Athletics
(Definition of marathon noun (RACE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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