1. A hinged board or closure at the rear of a vehicle, such as a pick-up truck, that can be lowered during loading and unloading. also called tailboard.
2. one of the pair of gates downstream in a canal lock.
3. to drive so closely behind (another vehicle) that one cannot stop or swerve with ease in an emergency.
4. slang to follow closely behind (another person), as in gaining access to an area requiring the use of an electronic identification card.
5. to follow another vehicle too closely.
6. to participate in a picnic that is served from the tailgate of a vehicle, as before a sports event.

1. A hinged board or hatch at the rear of a vehicle that can be lowered for loading and unloading; a tailboard.
2. the hinged rear door of a hatchback.
3. either of the downstream gates in a canal lock.
4. to drive dangerously close behind another vehicle
5. 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.
6. (of a broker) to privately purchase or sell a security immediately after trading in the same security for a client.

1. a gate at the rear of a vehicle; can be lowered for loading
2. follow at a dangerously close distance