DictionaryrunningSport on foot
noun

running

RUN-ing/ˈrʌnɪŋ/

The activity or sport of moving quickly on foot.

She enjoys running along the river each morning.

A recreational runner captured mid-stride on a short stretch of running track, with both feet airborne, bent elbows and athletic clothing making exercise unmistakable.
Etymology

Run combined with the activity-forming -ing names the action itself. The noun already referred to rapid motion on foot in Old English, so the sporting sense preserves its central physical meaning.

In context

Gravitas Documentaries70:34
I think running has helped keep my body from becoming like a lot of 80 year-olds and has kept me healthy. I think running has strengthened my body so that I've healed more quickly.
The Human Race - Katherine Switzer - NYC Marathon - Inspirational Sports Documentary

More examples

  • Running strengthens his legs.
  • He took up running last spring.
  • The club welcomes beginners interested in running.

Forms

running

Similar words

jogging
Usually means running at a gentle, steady pace.
sprinting
Specifically running at high speed over a short distance.