Definitions for "Impeding"
preventing movement; "the clogging crowds of revelers overflowing into the street"
Hindering the movement of an opposing player who does not have possession of the ball.
It is an ordinary foul to push, push off from or refrain the free limb movement of, or to impede in any way, an opponent who has not gained an offensive advantage and who is not holding the ball.
Keywords:  stride, runner, bumps, slow, violation
A violation in which one runner bumps, or cuts in front of, another runner forcing him to slow down or break stride.
Keywords:  obstructing