Definitions of tail:

• noun:   the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body
• noun:   the rear part of an aircraft
• noun:   (usually plural) the reverse side of a coin that does not bear the representation of a person's head
• noun:   a spy employed to follow someone and report their movements
• noun:   any projection that resembles the tail of an animal
• noun:   the time of the last part of something

  Example: "The tail of the storm"

• noun:   the fleshy part of the human body that you sit on
• noun:   the rear part of a ship
• verb:   remove the stalk of fruits or berries
• verb:   remove or shorten the tail of an animal
• verb:   go after with the intent to catch
• name:  A surname (very rare: popularity rank in the U.S.: #77366)