The difference between Preview and Trailer
When used as nouns, preview means a foretaste of something, whereas trailer means someone who or something that trails.
When used as verbs, preview means to show or watch something, or part of it, before it is complete, whereas trailer means to load on a trailer or to transport by trailer.
check bellow for the other definitions of Preview and Trailer
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Preview as a noun:
A foretaste of something.
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Preview as a noun (colloquial):
An advance showing of a film, exhibition etc.
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Preview as a noun:
Something seen in advance.
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Preview as a noun (computing):
a facility for seeing and checking a document, or changes to it, before saving and/or printing it.
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Preview as a verb:
To show or watch something, or part of it, before it is complete.
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Trailer as a noun:
Someone who or something that trails.
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Trailer as a noun:
Part of an object which extends some distance beyond the main body of the object.
Examples:
"synonyms: appendage attachment appendix extension extrusion"
"the trailer of a plant"
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Trailer as a noun:
An unpowered wheeled vehicle, not a caravan or camper, that is towed behind another, and used to carry equipment, etc, that cannot be carried in the leading vehicle.
Examples:
"At the end of the day, we put the snowmobiles back on the trailer."
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Trailer as a noun (US):
A furnished vehicle towed behind another, and used as a dwelling when stationary; a caravan; a camper.
Examples:
"We drove our trailer to Yellowstone Park."
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Trailer as a noun (US):
A prefabricated home that could be towed to a new destination, but typically is permanently left in an area designated for such homes.
Examples:
"The young couple′s first home was in a trailer."
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Trailer as a noun (chiefly, US, media):
A preview of a film, video game or TV show.
Examples:
"The trailer for that movie makes it seem like it would be fun."
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Trailer as a noun:
A short blank segment of film at the end of a reel, for convenient insertion of the film in a projector.
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Trailer as a noun (computing):
The final record of a list of data items, often identified by a key field with an otherwise invalid value that sorts last alphabetically (e.g., “ZZZZZ”) or numerically (“99999”); especially common in the context of punched cards, where the final card is called a trailer card.
Examples:
"The linked list terminates with a trailer record."
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Trailer as a noun (networking):
The last part of a packet, often containing a check sequence.
Examples:
"The encapsulation layer adds an eight-byte header and a two-byte trailer to each packet."
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Trailer as a verb:
To load on a trailer or to transport by trailer.
Examples:
"The engine wouldn't run any more so we had to trailer my old car to the wrecking yard."