/ ˈtreɪlə(r); NAmE / noun
1.
a truck, or a container with wheels, that is pulled by another vehicle :
a car towing a trailer with a boat on it
—see also tractor-trailer
2.
( NAmE ) ( BrE mobile home ) a vehicle without an engine, that can be pulled by a car or truck or used as a home or an office when it is parked :
a trailer park (= an area where trailers are parked and used as homes)
3.
( NAmE ) = mobile home (1)
4.
( especially BrE ) ( NAmE usually preview ) a series of short scenes from a film / movie or television programme, shown in advance to advertise it
➡ note at ad