marathon
//ˈmærəθɒn//
Noun
marathonSingular
marathonsPlural
1
A long-distance running race of 42.195 kilometers (26.2 miles), typically run on roads.
She trained for six months to run her first marathon.
2
Any prolonged or difficult task, activity, or event requiring great endurance.
The meeting turned into a marathon that lasted over five hours.
Adjective
marathonCanonical form
1
Lasting an unusually long time; requiring great endurance.
The marathon meeting lasted over six hours.