Определение warning track в Английский Язык Английский Язык словарь
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
Fly ball to deep center. Shelby goes back and makes the catch on the warning track.
A strip of dirt or gravel along the outfield wall, designed to warn outfielders when they are approaching the wall