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Definition of marathon
marathon
/ˈmær.ə.θɑːn/
mar · a · thon
Plural:marathons
•Adjective:marathon
marathon Lexical Profile
CEFR
B1
Grade
4
Tier
2
Usage
Top 5k
marathon Game Scores & Validity
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WWF
Wordle Guess
• noun
1
A long-distance running race, strictly measuring 26 miles 385 yards (42.195 kilometers).
Example
"She trained for six months to run her first marathon in Boston."
2
A long-lasting, difficult, or exhausting task or activity requiring great endurance.
Example
"The treaty negotiations turned into a marathon, lasting well past midnight."
Synonyms
View all synonyms for marathon Antonyms
View all antonyms for marathonWord Origin & Etymology
Derived from the legend of the Greek messenger Pheidippides, who is said to have run from the battlefield of Marathon to Athens in 490 BC to announce the Greek victory over Persia before collapsing and dying. The place name 'Marathon' comes from Ancient Greek 'marathon', meaning 'a field of fennel'.
Cite this Entry
Wordmom. (2026). Definition of Marathon. In Wordmom Dictionary. Retrieved Oct 12, 2026, from https://wordmom.com/dictionary/marathon