marathon Pronunciation: /ˈmærəθən; (US) -θɒn/Translate marathon | into German | into Italian | into Spanish French translation of marathonA. n marathon (m)B. adj 1 [Sport] marathon runner = marathonien/-ienne (m/f) 2 (massive) -marathon a marathon session = une séance-marathonmarathon in other Oxford dictionaries Definition of marathon in the British & World English dictionary Definition of marathon in the US English dictionary