any long and arduous undertaking
"The renovation of our entire house felt like a marathon, but we finally finished it today."
a footrace of 26 miles 385 yards
"After training for months, she finally crossed the finish line to complete her first marathon."
a battle in 490 BC in which the Athenians and their allies defeated the Persians
"The ancient marathon race honors the legendary run that followed the Athenian victory over the Persian forces at the Battle of Marathon."
A 42.195 kilometre (26 mile 385 yard) road race.
"She trained for months to complete the marathon, hoping to finish under four hours on race day."
To run a marathon.
"After weeks of training, Sarah finally decided to register for the city marathon."
A town in Attica, Greece, the site of the victory in 490 BC of heavily outnumbered Athenians against Persians.
"The ancient battle at Marathon remains a powerful symbol of how courage can overcome overwhelming odds when a city stands united to defend its freedom."