plural trailers
1
: a long platform or box with wheels that is pulled behind a truck or car and used to transport things
We helped them load the furniture onto the trailer.
a horse/boat trailer
2
chiefly US
a
: a vehicle that can be pulled by a truck or car and that can be parked and used as an office, vacation home, etc.
We parked our trailer [=(Brit) caravan] next to the lake for the summer.
b
3
: a selected group of scenes that are shown to advertise a movie : preview
a theatrical trailer
Cite this Entry
“Trailer.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/trailer. Accessed 21 Jun. 2026.
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