marathon - definition and synonyms

 
noun [countable] 

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/ˈmærəθ(ə)n/
singularmarathon
pluralmarathons
  1. 1
    a race in which people run on roads over a distance of 42 kilometres or about 26 miles
  2. 2
    an activity that takes a long time to complete and needs a lot of energy and determination

    The meeting turned out to be a bit of a marathon.