To Trail

1. (transitive) To follow behind (someone or something); to tail (someone or something).
2. (transitive) To drag (something) behind on the ground.
3. (transitive) To leave (a trail of).
4. (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. To be losing, to be behind in a competition.
6. (military) To carry (a firearm) with the breech near the ground and the upper part inclined forward, the piece being held by the right hand near the middle.
7. To flatten (grass, etc.) by walking through it; to tread down.
8. (dated) To take advantage of the ignorance of; to impose upon.