Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A big rig truck: a semi-trailer plus the truck or tractor pulling it.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the total number of wheels: two front steering wheels on the tractor, plus dual wheels on each end of two axles (total of 8) at the rear of the tractor and supporting the front of the trailer, plus dual wheels on two axles at the rear of the trailer.

Support

Help support Wordnik (and make this page ad-free) by adopting the word 18-wheeler.

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.