A Quick and Simple Dictionary

trail

1. Verb.  (transitive) To follow behind (someone or something); to tail (someone or something).
2. Verb.  (transitive) To drag (something) behind on the ground.
3. Verb.  (transitive) To leave (a trail of).
4. Verb.  (transitive) To show a trailer of (a film, TV show etc.); to release or publish a preview of (a report etc.) in advance of the full publication.
5. Verb.  To be losing, to be behind in a competition.
6. Noun.  The track or indication marking the route followed by something that has passed, such as the footprints of animal on land or the contrail of an airplane in the sky.
7. Noun.  A route for travel over land, especially a narrow, unpaved pathway for use by hikers, horseback riders, etc.
8. Noun.  A trailer broadcast on television for a forthcoming film or programme.