track

A track is a line on the ground or in space that people, animals or vehicles follow.

Example: It's right where Hardy Road crosses the railroad tracks.

A track is a single part of an audio recording that can be separated from other parts of a recording.

Example: You can make digital copies of the CD tracks and save them in MP3 format.

A track is a mark left on the ground by somebody or something walking or driving.

Example: Phillip glanced at the policemen measuring and marking the tire tracks.

If you keep track of something, you follow it or always know where it is or what's happening with it.

Example: I use a watch in order to keep track of how long I've been studying.

Track is the sport of running and jumping on a track.

Example: No new records were set in the most recent track and field championships.