A dump truck at a construction site.
dump truck definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a truck with a back end that can be tilted backward to dump a load through the opened tailgate
dump truck definition by American Heritage Dictionary
A heavy-duty truck having a bed that tilts backward to dump loose material.