semitrailer
noun
semi·trail·er
ˈse-ˌmī-ˌtrā-lər 
ˈse-mē-,
-mi-
plural semitrailers
1
: a freight trailer that when attached is supported at its forward end by the fifth wheel device of the truck tractor
2
: a trucking rig made up of a tractor and a semitrailer
called also big rig
Examples of semitrailer in a Sentence
Recent Examples on the Web
Another 28 people were injured in the 36-vehicle crash, which involved seven semitrailers and 29 passenger vehicles, according to the agency.
—
Lauren Penington, Denver Post, 18 Feb. 2026
The storm caused an hours-long mess on Interstate 85 northeast of the city, after a crash left dozens of semitrailers and other vehicles backed up into the evening, according to the State Highway Patrol.
—Adrian Sainz, Los Angeles Times, 1 Feb. 2026
The state announced travel restrictions for some commercial vehicles, such as semitrailers, on interstates starting Friday afternoon.
—Andrew Freedman, CNN Money, 26 Dec. 2025
The investigation showed that a sport utility vehicle driven by the 47-year-old woman struck the rear of a slowing semitrailer, according to the release.
—Cathy Kozlowicz, jsonline.com, 13 Nov. 2025
See All Example Sentences for semitrailer
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Lauren Penington, Denver Post, 18 Feb. 2026
The storm caused an hours-long mess on Interstate 85 northeast of the city, after a crash left dozens of semitrailers and other vehicles backed up into the evening, according to the State Highway Patrol.
—Adrian Sainz, Los Angeles Times, 1 Feb. 2026
The state announced travel restrictions for some commercial vehicles, such as semitrailers, on interstates starting Friday afternoon.
—Andrew Freedman, CNN Money, 26 Dec. 2025
The investigation showed that a sport utility vehicle driven by the 47-year-old woman struck the rear of a slowing semitrailer, according to the release.
—Cathy Kozlowicz, jsonline.com, 13 Nov. 2025
See All Example Sentences for semitrailer
Cite this Entry
“Semitrailer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semitrailer. Accessed 21 Feb. 2026.
Copy CitationKids Definition
semitrailer
noun
semi·trail·er
ˈsem-i-ˌtrā-lər
ˈsem-ˌī-
1
: a freight trailer that when attached is supported at its forward end by the truck tractor
2
: a trucking rig made up of a tractor and a semitrailer
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