marathoner
nounUK /ˈmærəθənə/
US /ˈmærəθɑːnər/
A marathoner is a person who runs a very long race of about 26 miles.
My aunt is a marathoner who trains every morning before work.
OTHER MEANINGS
2. A person who shows great endurance in any long or difficult activity.
She's a marathoner when it comes to studying for exams.
3. Someone who competes regularly in marathon races.
The club is full of marathoners preparing for next month's event.
4. A person who finishes something that takes a very long time.
After the ten-hour meeting, we felt like marathoners.