trailer

noun

1. a person, animal, or thing that trails another
2. ☆ a cart, wagon, or large van, designed to be pulled by an automobile, truck, or tractor (sense ), for hauling freight, animals, a boat, etc.
3. ☆ a closed vehicle designed to be pulled by an automobile or truck and equipped as a place to live or work in, as one with beds, cooking facilities, etc.
4. ☆ Film
   1. an advertisement for a feature film, typically consisting of brief portions of scenes from that film
   2. a blank length of film at the end of a reel

transitive verb

intransitive verb