Real Dictionary

track
Railway tracks are the rails that a train travels along.
countable noun: A track is a narrow road or path.
countable noun: A track is a piece of ground, often oval-shaped, that is used for races involving athletes, cars, bicycles, horses, or dogs called greyhounds.

track in American English
a mark or series of marks or other discoverable evidence left by a person, animal, or thing that has passed, as a footprint, wheel rut, wake of a boat, etc.
to follow the track or footprints of
noun: a structure consisting of a pair of parallel lines of rails with their crossties, on which a railroad train, trolley, or the like runs

track in British English
noun: the mark or trail left by something that has passed by