What is the definition of trail?

1. A beaten path through a wilderness or unsettled region.

2. A route or course taken by a person, animal, or thing; a track or path.

3. A marked-out course for a race or other competition.

4. A blaze or mark left by a thing (such as a person, animal, or vehicle).

5. (in geology) a line of exposed underlying strata extending across a landscape.

6. A long narrow trench used for drainage.

7. A trace or indication.

8. (sports) the path of a ball or other object in flight through the air.

Trail (_verb_)

1. To follow by means of a trail or track.

2. To pursue in order to catch or obtain.

3. (sports) to follow (a ball or other object) in its flight through the air.