• (Britain) The hinged rear door of a hatchback.
  • A hinged board or hatch at the rear of a vehicle that can be lowered for loading and unloading; a tailboard.
  • Either of the downstream gates in a canal lock.


  • To follow another person through access control on their access, rather than on one’s own credentials, especially when entering a door controlled by a card reader.
  • (automotive) To drive dangerously close behind another vehicle.

    "That idiot has been tailgating me for the last five minutes."

  • (US) to have a tailgate party
  • (finance, of a broker) To privately purchase or sell a security immediately after trading in the same security for a client.

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