eighteen-wheeler: Meaning and Definition of

eight•een-wheel•er

Pronunciation: (ā'tēn-hwē'lur, -wē'-), [key]
— n.
  1. a large tractor-trailer, usually having ten wheels on the cab and eight on the trailer.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.