MARATHON
marathon, endurance contest
(noun) any long and arduous undertaking
Marathon, battle of Marathon
(noun) a battle in 490 BC in which the Athenians and their allies defeated the Persians
marathon
(noun) a footrace of 26 miles 385 yards
Source: WordNet® 3.1
Etymology
Noun
marathon (plural marathons)
A 42.195 kilometre (26 mile 385 yard) road race.
(figuratively, by extension) Any extended or sustained activity.
Verb
marathon (third-person singular simple present marathons, present participle marathoning, simple past and past participle marathoned)
To run a marathon.
(informal, transitive) To watch or read a large number of instalments of (a film, book, TV series, etc.) in one sitting.
Etymology
Proper noun
Marathon
A town in Attica, Greece, the site of the victory in 490 BC of heavily outnumbered Athenians against Persians.
Source: Wiktionary