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trailer

trailer /ˈtreɪlɚ/ noun
plural trailers
trailer
/ˈtreɪlɚ/
noun
plural trailers
Britannica Dictionary definition of TRAILER
[count]
: a long platform or box with wheels that is pulled behind a truck or car and used to transport things
see also tractor-trailer
chiefly US
: a vehicle that can be pulled by a truck or car and that can be parked and used as an office, vacation home, etc.
: mobile home
: a selected group of scenes that are shown to advertise a movie : preview