(softball, baseball) The dirt or other material on the edge of a baseball or softball field that warns a player that he or she is approaching the fence, especially the portion in the outfield.

(sports, chiefly racing) The lane or track nearest to the interior. / (figuratively) Any advantage.

railroad track, railway track / (topology) A set of curves lying in a surface, meeting one another at their respective endpoints in a specific way that resembles railroad tracks

(Australia, Canada, New Zealand, US) Sweatpants.

(of a railway) having a single set of lines so that trains can run only in one direction at a time; single-track / limited to one idea or thought

Away from an intended route; wayward / (of gambling) conducted away from a racetrack

(rail transport, US) A pair of formed steel rails, separated and supported usually on wooden or concrete ties or sleepers, forming a track along which flange-wheeled railroad vehicles may travel.

Using the correct general approach to a particular task or problem; pursuing something in a promising way.

plural of warning track

A pair of parallel rails along which a railway train runs.