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
Earlier this month, a United flight landing at Newark airport struck a semitrailer truck and a light pole, though no one was injured.
—
CBS News, 1 June 2026
Earlier this month, a United flight landing at Newark airport struck a semitrailer truck and a light pole, though no one was injured.
—ABC News, 31 May 2026
An early morning rollover crash involving a semitrailer carrying fuel in Jefferson County shut down westbound Interstate 70 for more than seven hours Wednesday.
—Lauren Penington, Denver Post, 27 May 2026
Coming in at a whopping $500 fine, parking a boat, motor home, truck camper or vending cart for over 15 days is tied with on-street parking of truck tractors or semitrailers for the highest parking violation fines in the city.
—Kaitlyn McCormick, USA Today, 12 May 2026
See All Example Sentences for semitrailer
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CBS News, 1 June 2026
Earlier this month, a United flight landing at Newark airport struck a semitrailer truck and a light pole, though no one was injured.
—ABC News, 31 May 2026
An early morning rollover crash involving a semitrailer carrying fuel in Jefferson County shut down westbound Interstate 70 for more than seven hours Wednesday.
—Lauren Penington, Denver Post, 27 May 2026
Coming in at a whopping $500 fine, parking a boat, motor home, truck camper or vending cart for over 15 days is tied with on-street parking of truck tractors or semitrailers for the highest parking violation fines in the city.
—Kaitlyn McCormick, USA Today, 12 May 2026
See All Example Sentences for semitrailer
Cite this Entry
“Semitrailer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semitrailer. Accessed 5 Jun. 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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