Trailer may refer to:

Transportation

Trailer (vehicle) A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials. Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities where people can camp ...

, an unpowered vehicle pulled by a powered vehicle **

Baggage trailer A trailer is an unpowered vehicle towed by a powered vehicle. It is commonly used for the transport of goods and materials. Sometimes recreational vehicles, travel trailers, or mobile homes with limited living facilities where people can camp ...

, a large flatbed baggage trolley **

Bicycle trailer A bicycle trailer is a motorless wheeled frame with a hitch system for transporting cargo by bicycle. It can greatly increase a bike's cargo capacity, allowing point-to-point haulage of objects up to 4 cubic yards (3 cubic metres) in volu ...

, a wheeled frame for hitching to a bicycle to tow cargo or passengers **

Boat trailer A boat trailer is designed to launch, retrieve, carry and sometimes store boats. Commercial boat trailers Commercial hydraulic boat trailers are used by marinas, boat yards, boat haulers, boat dealers and boat builders. Generally this type ...

to carry small boats **

Horse trailer A horse trailer or horse van (also called a horse float in Australia and New Zealand or horsebox in the British Isles) is used to transport horses. There are many different designs, ranging in size from small units capable of holding two or thre ...

and other trailers designed to haul livestock **

Semi-trailer A semi-trailer is a trailer without a front axle. In the United States, the term is also used to refer to the combination of a truck and a semi-trailer; a tractor-trailer. A large proportion of a semi-trailer's weight is supported by a tracto ...

, a trailer without a front axle **

Travel trailer A caravan, travel trailer, camper, tourer or camper trailer is a trailer towed behind a road vehicle to provide a place to sleep which is more comfortable and protected than a tent (although there are fold-down trailer tents). It provides the ...

, or caravan, a type of recreational trailer designed to provide sleeping space *

Semi-trailer truck A semi-trailer truck, also known as a semitruck, (or semi, eighteen-wheeler, big rig, tractor-trailer or, by synecdoche, a semitrailer) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer ...

, the combination of a tractor unit and one or more semi-trailers

Shelter

Mobile home A mobile home (also known as a house trailer, park home, trailer, or trailer home) is a prefabricated structure, built in a factory on a permanently attached chassis before being transported to site (either by being towed or on a trailer). Us ...

, a relocatable housing unit with wheels and a hitch. *

Portable classroom A portable classroom (also known as a demountable or relocatable classroom, portables, bungalows), is a type of portable building installed at a school to temporarily and quickly provide additional classroom space where there is a shortage of ...

, a temporary classroom for schools with insufficient building capacity - not technically a trailer due to lack of wheels or hitch. This temporary shelter can be relocated with a trailer, but by definition, the structure itself is not a trailer. *

Construction trailer Construction trailers are mobile structures (trailers) used to accommodate temporary offices, dining facilities and storage of building materials during construction projects. Hook-ups Typically, trailers need to be equipped with telephone lines ...

, relocatable temporary accommodation with wheels and hitch used for offices and building materials storage on construction sites.

Computing

Trailer (computing) In information technology, a trailer or footer refers to supplemental data (metadata) placed at the end of a block of data being stored or transmitted, which may contain information for the handling of the data block, or simply mark the block's ...

, data appended to a main block of data to facilitate its processing

Multimedia

Trailer (promotion) A trailer (also known as a preview, coming attraction or attraction video) is a commercial advertisement, originally for a feature film that is going to be exhibited in the future at a movie theater/cinema. It is a product of creative and tech ...

, an advertisement, usually in the form of a brief excerpt or string of excerpts, for media work **

Teaser trailer A teaser (or more specifically teaser trailer) is a mini- trailer and a form of teaser campaign advertising that focuses on film and television programming. It is a videography pre-release move or television show advertisement. Short in length, te ...

, a truncated version of a trailer meant to "tease" an upcoming work

Music

* ''Trailer'' (album), a 1994 album from the Northern Irish musical group Ash *''

Tráiler ''Tráiler'' is the debut extended play by Spanish singer Aitana. It will be released through Universal Music's Spain subdivision on 30 November 2018. ''Tráiler'' was produced by Aitana, being the first musical project where the singer was involv ...

'', 2018 extended play by Spanish singer Aitana {{disambiguation