ultramarathonEnglishOxford Dictionary of Englishultramarathon /ˈʌltrəmarəθ(ə)n / ▸ noun a long-distance running race that is longer than a marathon (which is strictly 26 miles 385 yards/42.195 km): the race was his third ultramarathon of 100 miles or more in six weeks [as modifier] an avid mountain biker and ultramarathon runner. – DERIVATIVES ultramarathoner /ˈʌltrəmarəθ(ə)nə(r)/ noun
EnglishOxford Dictionary of EnglishEnglishOxford Dictionary of English
