To run. The act of running. A pace faster than a walk. To move forward quickly, to go at a fast pace, to cause to move quickly.
Let's try some other definitions, shall we?
An interval or distance of time.
A series of tries in a game that were successful or unsuccessful.
A trial of an experiment.
A standard or unexceptional group or category.
The enclosure for an animal.
A sequence of cards in a suit in a card game.
And so on.
The one I find interesting is the trial of an experiment. So when a runner begins a run, is he or she an experiment? A test in how long they will survive?
An interval, distance of time, a series of tries. A run of bad luck.
An enclosure for an animal. A rabbit run.
You have to look at words, look at what they mean, not just what we think they mean. Because otherwise they will trap you.