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
Hyundai Translead, North America’s leading semitrailer builder, struck an agreement with the state to establish major new manufacturing facilities in Will County, creating close to 2,500 new Illinois jobs.
—
The Editorial Board, Chicago Tribune, 23 Mar. 2026
The driver of the semitrailer was treated for minor conditions and declined to be taken to a hospital.
—Lauren Penington, Denver Post, 10 Mar. 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
See All Example Sentences for semitrailer
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The Editorial Board, Chicago Tribune, 23 Mar. 2026
The driver of the semitrailer was treated for minor conditions and declined to be taken to a hospital.
—Lauren Penington, Denver Post, 10 Mar. 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
See All Example Sentences for semitrailer
Cite this Entry
“Semitrailer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semitrailer. Accessed 31 Mar. 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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