'dump truck' definitions:

Definition of 'dump truck'

(from WordNet)
noun
Truck whose contents can be emptied without handling; the front end of the platform can be pneumatically raised so that the load is discharged by gravity [syn: dump truck, dumper, tipper truck, tipper lorry, tip truck, tipper]

Definition of 'dump truck'

From: GCIDE
  • dump truck \dump" truck`\ n. a truck, usually with an open top, the carrying bopdy of which can be tilted so as to emptied its contents without handling.
  • Syn: dumper. [WordNet 1.5]