A Trail

1. The track or indication marking the routefollowed by something that has passed, such as the footprints of animal on land or the contrail of an airplane in the sky.
2. A route for travel over land, especially a narrow, unpaved pathway for use by hikers, horseback riders, etc.
3. A trailer broadcast on television for a forthcoming film or programme.
4. (graph theory) A walk in which all the edgesare distinct.

Synonyms

• (track of an animal): spoor, sign
• (route for travel over land): dirt track, footpath, path, track