Definitions for ultramarathonˌʌl trəˈmær əˌθɒn, -θən
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Random House Webster's College Dictionary
ul•tra•mar•a•thonˌʌl trəˈmær əˌθɒn, -θən(n.)
any footrace that is longer than a marathon.
Category: Sport
Origin of ultramarathon:
1975–80
ul`tra•mar′a•thon`er(n.)
Wiktionary
ultramarathon(Noun)
A running race over a distance longer than 42.195 km, the length of a marathon.
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