1. noun /ɹʌn/
a) The act of running.
I just got back from my run.
b) The route taken while running or skiing.
Which run did you do today?
2. adjective /ɹʌn/
Put some run butter on the vegetables.
b) Exhausted; depleted (especially with "down" or "out".)
3. verb /ɹʌn/
a) To move forward quickly upon two feet by alternately making a short jump off of either foot, compare: walk.
Run, Sarah, run!
The horse ran the length of the track.
Wikipedia foundation.