marathon
nounA cross-country footrace of 26 miles, 385 yards (42.195 kilometers).
nounA long-distance race other than a footrace.
nounA contest of endurance.
nounAn event or activity that requires prolonged effort, endurance, or attention.
nounA footrace of 26 miles 385 yards.
nounAny long and arduous undertaking, straining the endurance of the participants.
nouna battle in 490 BC in which the Athenians and their allies defeated the Persians.
nounA 42.195 kilometre (26 mile 385 yard) road race.