the act of running; traveling on foot at a fast pace; "he broke into a run"; "his daily run keeps him fit";
the act of participating in an athletic competition involving running on a track;
(American football) a play in which a player runs with the ball; "the defensive line braced to stop the run"; "the coach put great emphasis on running";
the act of administering or being in charge of something; "he has responsibility for the running of two companies at the same time";
the state of being in operation; "the engine is running smoothly";