What is the meaning of trail?

noun

• A track or mark left by something that has passed.
  • usage: "there as a trail of blood"; "a tear left its trail on her cheek"
• A path or track roughly blazed through wild or hilly country.
• Evidence pointing to a possible solution.
  • usage: "the police are following a promising lead"; "the trail led straight to the perpetrator"
  • synonyms: lead, track

verb

• To lag or linger behind.
  • usage: "But in so many other areas we still are dragging"
  • synonyms: drag, get behind, hang back, drop behind, drop back
• Go after with the intent to catch.
  • usage: "The policeman chased the mugger down the alley"; "the dog chased the rabbit"
  • synonyms: chase, chase after, tail, tag, give chase, dog, go after, track
• Move, proceed, or walk draggingly or slowly.
  • usage: "John trailed behind his class mates"; "The Mercedes trailed behind the horse cart"
  • synonyms: shack
• Hang down so as to drag along the ground.
  • usage: "The bride's veiled trailed along the ground"
• Drag loosely along a surface; allow to sweep the ground.
  • usage: "The toddler was trailing his pants"; "She trained her long scarf behind her"
  • synonyms: train