What is the meaning of tailing?

noun

• The act of following someone secretly.
  • synonyms: shadowing

verb

• 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, trail, tail, tag, give chase, dog, go after, track
• Remove or shorten the tail of an animal.
  • synonyms: dock, tail, bob
• Remove the stalk of fruits or berries.
  • synonyms: tail